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Linux/drivers/hwmon/it87.c

  1 /*
  2  *  it87.c - Part of lm_sensors, Linux kernel modules for hardware
  3  *           monitoring.
  4  *
  5  *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a
  6  *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in
  7  *  addition to an Environment Controller (Enhanced Hardware Monitor and
  8  *  Fan Controller)
  9  *
 10  *  This driver supports only the Environment Controller in the IT8705F and
 11  *  similar parts.  The other devices are supported by different drivers.
 12  *
 13  *  Supports: IT8603E  Super I/O chip w/LPC interface
 14  *            IT8620E  Super I/O chip w/LPC interface
 15  *            IT8623E  Super I/O chip w/LPC interface
 16  *            IT8705F  Super I/O chip w/LPC interface
 17  *            IT8712F  Super I/O chip w/LPC interface
 18  *            IT8716F  Super I/O chip w/LPC interface
 19  *            IT8718F  Super I/O chip w/LPC interface
 20  *            IT8720F  Super I/O chip w/LPC interface
 21  *            IT8721F  Super I/O chip w/LPC interface
 22  *            IT8726F  Super I/O chip w/LPC interface
 23  *            IT8728F  Super I/O chip w/LPC interface
 24  *            IT8758E  Super I/O chip w/LPC interface
 25  *            IT8771E  Super I/O chip w/LPC interface
 26  *            IT8772E  Super I/O chip w/LPC interface
 27  *            IT8781F  Super I/O chip w/LPC interface
 28  *            IT8782F  Super I/O chip w/LPC interface
 29  *            IT8783E/F Super I/O chip w/LPC interface
 30  *            IT8786E  Super I/O chip w/LPC interface
 31  *            IT8790E  Super I/O chip w/LPC interface
 32  *            Sis950   A clone of the IT8705F
 33  *
 34  *  Copyright (C) 2001 Chris Gauthron
 35  *  Copyright (C) 2005-2010 Jean Delvare <jdelvare@suse.de>
 36  *
 37  *  This program is free software; you can redistribute it and/or modify
 38  *  it under the terms of the GNU General Public License as published by
 39  *  the Free Software Foundation; either version 2 of the License, or
 40  *  (at your option) any later version.
 41  *
 42  *  This program is distributed in the hope that it will be useful,
 43  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 44  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 45  *  GNU General Public License for more details.
 46  *
 47  *  You should have received a copy of the GNU General Public License
 48  *  along with this program; if not, write to the Free Software
 49  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 50  */
 51 
 52 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 53 
 54 #include <linux/module.h>
 55 #include <linux/init.h>
 56 #include <linux/slab.h>
 57 #include <linux/jiffies.h>
 58 #include <linux/platform_device.h>
 59 #include <linux/hwmon.h>
 60 #include <linux/hwmon-sysfs.h>
 61 #include <linux/hwmon-vid.h>
 62 #include <linux/err.h>
 63 #include <linux/mutex.h>
 64 #include <linux/sysfs.h>
 65 #include <linux/string.h>
 66 #include <linux/dmi.h>
 67 #include <linux/acpi.h>
 68 #include <linux/io.h>
 69 
 70 #define DRVNAME "it87"
 71 
 72 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
 73              it8772, it8781, it8782, it8783, it8786, it8790, it8603, it8620 };
 74 
 75 static unsigned short force_id;
 76 module_param(force_id, ushort, 0);
 77 MODULE_PARM_DESC(force_id, "Override the detected device ID");
 78 
 79 static struct platform_device *pdev;
 80 
 81 #define REG     0x2e    /* The register to read/write */
 82 #define DEV     0x07    /* Register: Logical device select */
 83 #define VAL     0x2f    /* The value to read/write */
 84 #define PME     0x04    /* The device with the fan registers in it */
 85 
 86 /* The device with the IT8718F/IT8720F VID value in it */
 87 #define GPIO    0x07
 88 
 89 #define DEVID   0x20    /* Register: Device ID */
 90 #define DEVREV  0x22    /* Register: Device Revision */
 91 
 92 static inline int superio_inb(int reg)
 93 {
 94         outb(reg, REG);
 95         return inb(VAL);
 96 }
 97 
 98 static inline void superio_outb(int reg, int val)
 99 {
100         outb(reg, REG);
101         outb(val, VAL);
102 }
103 
104 static int superio_inw(int reg)
105 {
106         int val;
107         outb(reg++, REG);
108         val = inb(VAL) << 8;
109         outb(reg, REG);
110         val |= inb(VAL);
111         return val;
112 }
113 
114 static inline void superio_select(int ldn)
115 {
116         outb(DEV, REG);
117         outb(ldn, VAL);
118 }
119 
120 static inline int superio_enter(void)
121 {
122         /*
123          * Try to reserve REG and REG + 1 for exclusive access.
124          */
125         if (!request_muxed_region(REG, 2, DRVNAME))
126                 return -EBUSY;
127 
128         outb(0x87, REG);
129         outb(0x01, REG);
130         outb(0x55, REG);
131         outb(0x55, REG);
132         return 0;
133 }
134 
135 static inline void superio_exit(void)
136 {
137         outb(0x02, REG);
138         outb(0x02, VAL);
139         release_region(REG, 2);
140 }
141 
142 /* Logical device 4 registers */
143 #define IT8712F_DEVID 0x8712
144 #define IT8705F_DEVID 0x8705
145 #define IT8716F_DEVID 0x8716
146 #define IT8718F_DEVID 0x8718
147 #define IT8720F_DEVID 0x8720
148 #define IT8721F_DEVID 0x8721
149 #define IT8726F_DEVID 0x8726
150 #define IT8728F_DEVID 0x8728
151 #define IT8771E_DEVID 0x8771
152 #define IT8772E_DEVID 0x8772
153 #define IT8781F_DEVID 0x8781
154 #define IT8782F_DEVID 0x8782
155 #define IT8783E_DEVID 0x8783
156 #define IT8786E_DEVID 0x8786
157 #define IT8790E_DEVID 0x8790
158 #define IT8603E_DEVID 0x8603
159 #define IT8620E_DEVID 0x8620
160 #define IT8623E_DEVID 0x8623
161 #define IT87_ACT_REG  0x30
162 #define IT87_BASE_REG 0x60
163 
164 /* Logical device 7 registers (IT8712F and later) */
165 #define IT87_SIO_GPIO1_REG      0x25
166 #define IT87_SIO_GPIO2_REG      0x26
167 #define IT87_SIO_GPIO3_REG      0x27
168 #define IT87_SIO_GPIO5_REG      0x29
169 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
170 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
171 #define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
172 #define IT87_SIO_VID_REG        0xfc    /* VID value */
173 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
174 
175 /* Update battery voltage after every reading if true */
176 static bool update_vbat;
177 
178 /* Not all BIOSes properly configure the PWM registers */
179 static bool fix_pwm_polarity;
180 
181 /* Many IT87 constants specified below */
182 
183 /* Length of ISA address segment */
184 #define IT87_EXTENT 8
185 
186 /* Length of ISA address segment for Environmental Controller */
187 #define IT87_EC_EXTENT 2
188 
189 /* Offset of EC registers from ISA base address */
190 #define IT87_EC_OFFSET 5
191 
192 /* Where are the ISA address/data registers relative to the EC base address */
193 #define IT87_ADDR_REG_OFFSET 0
194 #define IT87_DATA_REG_OFFSET 1
195 
196 /*----- The IT87 registers -----*/
197 
198 #define IT87_REG_CONFIG        0x00
199 
200 #define IT87_REG_ALARM1        0x01
201 #define IT87_REG_ALARM2        0x02
202 #define IT87_REG_ALARM3        0x03
203 
204 /*
205  * The IT8718F and IT8720F have the VID value in a different register, in
206  * Super-I/O configuration space.
207  */
208 #define IT87_REG_VID           0x0a
209 /*
210  * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
211  * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
212  * mode.
213  */
214 #define IT87_REG_FAN_DIV       0x0b
215 #define IT87_REG_FAN_16BIT     0x0c
216 
217 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
218 
219 static const u8 IT87_REG_FAN[]         = { 0x0d, 0x0e, 0x0f, 0x80, 0x82, 0x4c };
220 static const u8 IT87_REG_FAN_MIN[]     = { 0x10, 0x11, 0x12, 0x84, 0x86, 0x4e };
221 static const u8 IT87_REG_FANX[]        = { 0x18, 0x19, 0x1a, 0x81, 0x83, 0x4d };
222 static const u8 IT87_REG_FANX_MIN[]    = { 0x1b, 0x1c, 0x1d, 0x85, 0x87, 0x4f };
223 static const u8 IT87_REG_TEMP_OFFSET[] = { 0x56, 0x57, 0x59 };
224 
225 #define IT87_REG_FAN_MAIN_CTRL 0x13
226 #define IT87_REG_FAN_CTL       0x14
227 #define IT87_REG_PWM(nr)       (0x15 + (nr))
228 #define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
229 
230 #define IT87_REG_VIN(nr)       (0x20 + (nr))
231 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
232 
233 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
234 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
235 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
236 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
237 
238 #define IT87_REG_VIN_ENABLE    0x50
239 #define IT87_REG_TEMP_ENABLE   0x51
240 #define IT87_REG_TEMP_EXTRA    0x55
241 #define IT87_REG_BEEP_ENABLE   0x5c
242 
243 #define IT87_REG_CHIPID        0x58
244 
245 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
246 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
247 
248 struct it87_devices {
249         const char *name;
250         const char * const suffix;
251         u16 features;
252         u8 peci_mask;
253         u8 old_peci_mask;
254 };
255 
256 #define FEAT_12MV_ADC           (1 << 0)
257 #define FEAT_NEWER_AUTOPWM      (1 << 1)
258 #define FEAT_OLD_AUTOPWM        (1 << 2)
259 #define FEAT_16BIT_FANS         (1 << 3)
260 #define FEAT_TEMP_OFFSET        (1 << 4)
261 #define FEAT_TEMP_PECI          (1 << 5)
262 #define FEAT_TEMP_OLD_PECI      (1 << 6)
263 #define FEAT_FAN16_CONFIG       (1 << 7)        /* Need to enable 16-bit fans */
264 #define FEAT_FIVE_FANS          (1 << 8)        /* Supports five fans */
265 #define FEAT_VID                (1 << 9)        /* Set if chip supports VID */
266 #define FEAT_IN7_INTERNAL       (1 << 10)       /* Set if in7 is internal */
267 #define FEAT_SIX_FANS           (1 << 11)       /* Supports six fans */
268 
269 static const struct it87_devices it87_devices[] = {
270         [it87] = {
271                 .name = "it87",
272                 .suffix = "F",
273                 .features = FEAT_OLD_AUTOPWM,   /* may need to overwrite */
274         },
275         [it8712] = {
276                 .name = "it8712",
277                 .suffix = "F",
278                 .features = FEAT_OLD_AUTOPWM | FEAT_VID,
279                                                 /* may need to overwrite */
280         },
281         [it8716] = {
282                 .name = "it8716",
283                 .suffix = "F",
284                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
285                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
286         },
287         [it8718] = {
288                 .name = "it8718",
289                 .suffix = "F",
290                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
291                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
292                 .old_peci_mask = 0x4,
293         },
294         [it8720] = {
295                 .name = "it8720",
296                 .suffix = "F",
297                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET | FEAT_VID
298                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS,
299                 .old_peci_mask = 0x4,
300         },
301         [it8721] = {
302                 .name = "it8721",
303                 .suffix = "F",
304                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
305                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI
306                   | FEAT_FAN16_CONFIG | FEAT_FIVE_FANS | FEAT_IN7_INTERNAL,
307                 .peci_mask = 0x05,
308                 .old_peci_mask = 0x02,  /* Actually reports PCH */
309         },
310         [it8728] = {
311                 .name = "it8728",
312                 .suffix = "F",
313                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
314                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS
315                   | FEAT_IN7_INTERNAL,
316                 .peci_mask = 0x07,
317         },
318         [it8771] = {
319                 .name = "it8771",
320                 .suffix = "E",
321                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
322                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
323                                 /* PECI: guesswork */
324                                 /* 12mV ADC (OHM) */
325                                 /* 16 bit fans (OHM) */
326                                 /* three fans, always 16 bit (guesswork) */
327                 .peci_mask = 0x07,
328         },
329         [it8772] = {
330                 .name = "it8772",
331                 .suffix = "E",
332                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
333                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
334                                 /* PECI (coreboot) */
335                                 /* 12mV ADC (HWSensors4, OHM) */
336                                 /* 16 bit fans (HWSensors4, OHM) */
337                                 /* three fans, always 16 bit (datasheet) */
338                 .peci_mask = 0x07,
339         },
340         [it8781] = {
341                 .name = "it8781",
342                 .suffix = "F",
343                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
344                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
345                 .old_peci_mask = 0x4,
346         },
347         [it8782] = {
348                 .name = "it8782",
349                 .suffix = "F",
350                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
351                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
352                 .old_peci_mask = 0x4,
353         },
354         [it8783] = {
355                 .name = "it8783",
356                 .suffix = "E/F",
357                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
358                   | FEAT_TEMP_OLD_PECI | FEAT_FAN16_CONFIG,
359                 .old_peci_mask = 0x4,
360         },
361         [it8786] = {
362                 .name = "it8786",
363                 .suffix = "E",
364                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
365                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
366                 .peci_mask = 0x07,
367         },
368         [it8790] = {
369                 .name = "it8790",
370                 .suffix = "E",
371                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
372                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
373                 .peci_mask = 0x07,
374         },
375         [it8603] = {
376                 .name = "it8603",
377                 .suffix = "E",
378                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
379                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_IN7_INTERNAL,
380                 .peci_mask = 0x07,
381         },
382         [it8620] = {
383                 .name = "it8620",
384                 .suffix = "E",
385                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
386                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_SIX_FANS
387                   | FEAT_IN7_INTERNAL,
388                 .peci_mask = 0x07,
389         },
390 };
391 
392 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
393 #define has_12mv_adc(data)      ((data)->features & FEAT_12MV_ADC)
394 #define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
395 #define has_old_autopwm(data)   ((data)->features & FEAT_OLD_AUTOPWM)
396 #define has_temp_offset(data)   ((data)->features & FEAT_TEMP_OFFSET)
397 #define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
398                                  ((data)->peci_mask & (1 << nr)))
399 #define has_temp_old_peci(data, nr) \
400                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
401                                  ((data)->old_peci_mask & (1 << nr)))
402 #define has_fan16_config(data)  ((data)->features & FEAT_FAN16_CONFIG)
403 #define has_five_fans(data)     ((data)->features & (FEAT_FIVE_FANS | \
404                                                      FEAT_SIX_FANS))
405 #define has_vid(data)           ((data)->features & FEAT_VID)
406 #define has_in7_internal(data)  ((data)->features & FEAT_IN7_INTERNAL)
407 #define has_six_fans(data)      ((data)->features & FEAT_SIX_FANS)
408 
409 struct it87_sio_data {
410         enum chips type;
411         /* Values read from Super-I/O config space */
412         u8 revision;
413         u8 vid_value;
414         u8 beep_pin;
415         u8 internal;    /* Internal sensors can be labeled */
416         /* Features skipped based on config or DMI */
417         u16 skip_in;
418         u8 skip_vid;
419         u8 skip_fan;
420         u8 skip_pwm;
421         u8 skip_temp;
422 };
423 
424 /*
425  * For each registered chip, we need to keep some data in memory.
426  * The structure is dynamically allocated.
427  */
428 struct it87_data {
429         struct device *hwmon_dev;
430         enum chips type;
431         u16 features;
432         u8 peci_mask;
433         u8 old_peci_mask;
434 
435         unsigned short addr;
436         const char *name;
437         struct mutex update_lock;
438         char valid;             /* !=0 if following fields are valid */
439         unsigned long last_updated;     /* In jiffies */
440 
441         u16 in_scaled;          /* Internal voltage sensors are scaled */
442         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
443         u8 has_fan;             /* Bitfield, fans enabled */
444         u16 fan[6][2];          /* Register values, [nr][0]=fan, [1]=min */
445         u8 has_temp;            /* Bitfield, temp sensors enabled */
446         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
447         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
448         u8 extra;               /* Register value (IT87_REG_TEMP_EXTRA) */
449         u8 fan_div[3];          /* Register encoding, shifted right */
450         u8 vid;                 /* Register encoding, combined */
451         u8 vrm;
452         u32 alarms;             /* Register encoding, combined */
453         u8 beeps;               /* Register encoding */
454         u8 fan_main_ctrl;       /* Register value */
455         u8 fan_ctl;             /* Register value */
456 
457         /*
458          * The following 3 arrays correspond to the same registers up to
459          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
460          * 7, and we want to preserve settings on mode changes, so we have
461          * to track all values separately.
462          * Starting with the IT8721F, the manual PWM duty cycles are stored
463          * in separate registers (8-bit values), so the separate tracking
464          * is no longer needed, but it is still done to keep the driver
465          * simple.
466          */
467         u8 pwm_ctrl[3];         /* Register value */
468         u8 pwm_duty[3];         /* Manual PWM value set by user */
469         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
470 
471         /* Automatic fan speed control registers */
472         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
473         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
474 };
475 
476 static int adc_lsb(const struct it87_data *data, int nr)
477 {
478         int lsb = has_12mv_adc(data) ? 12 : 16;
479         if (data->in_scaled & (1 << nr))
480                 lsb <<= 1;
481         return lsb;
482 }
483 
484 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
485 {
486         val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
487         return clamp_val(val, 0, 255);
488 }
489 
490 static int in_from_reg(const struct it87_data *data, int nr, int val)
491 {
492         return val * adc_lsb(data, nr);
493 }
494 
495 static inline u8 FAN_TO_REG(long rpm, int div)
496 {
497         if (rpm == 0)
498                 return 255;
499         rpm = clamp_val(rpm, 1, 1000000);
500         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
501 }
502 
503 static inline u16 FAN16_TO_REG(long rpm)
504 {
505         if (rpm == 0)
506                 return 0xffff;
507         return clamp_val((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
508 }
509 
510 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
511                                 1350000 / ((val) * (div)))
512 /* The divider is fixed to 2 in 16-bit mode */
513 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
514                              1350000 / ((val) * 2))
515 
516 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (((val) - 500) / 1000) : \
517                                     ((val) + 500) / 1000), -128, 127))
518 #define TEMP_FROM_REG(val) ((val) * 1000)
519 
520 static u8 pwm_to_reg(const struct it87_data *data, long val)
521 {
522         if (has_newer_autopwm(data))
523                 return val;
524         else
525                 return val >> 1;
526 }
527 
528 static int pwm_from_reg(const struct it87_data *data, u8 reg)
529 {
530         if (has_newer_autopwm(data))
531                 return reg;
532         else
533                 return (reg & 0x7f) << 1;
534 }
535 
536 
537 static int DIV_TO_REG(int val)
538 {
539         int answer = 0;
540         while (answer < 7 && (val >>= 1))
541                 answer++;
542         return answer;
543 }
544 #define DIV_FROM_REG(val) (1 << (val))
545 
546 /*
547  * PWM base frequencies. The frequency has to be divided by either 128 or 256,
548  * depending on the chip type, to calculate the actual PWM frequency.
549  *
550  * Some of the chip datasheets suggest a base frequency of 51 kHz instead
551  * of 750 kHz for the slowest base frequency, resulting in a PWM frequency
552  * of 200 Hz. Sometimes both PWM frequency select registers are affected,
553  * sometimes just one. It is unknown if this is a datasheet error or real,
554  * so this is ignored for now.
555  */
556 static const unsigned int pwm_freq[8] = {
557         48000000,
558         24000000,
559         12000000,
560         8000000,
561         6000000,
562         3000000,
563         1500000,
564         750000,
565 };
566 
567 static int it87_probe(struct platform_device *pdev);
568 static int it87_remove(struct platform_device *pdev);
569 
570 static int it87_read_value(struct it87_data *data, u8 reg);
571 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
572 static struct it87_data *it87_update_device(struct device *dev);
573 static int it87_check_pwm(struct device *dev);
574 static void it87_init_device(struct platform_device *pdev);
575 
576 
577 static struct platform_driver it87_driver = {
578         .driver = {
579                 .name   = DRVNAME,
580         },
581         .probe  = it87_probe,
582         .remove = it87_remove,
583 };
584 
585 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
586                        char *buf)
587 {
588         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
589         int nr = sattr->nr;
590         int index = sattr->index;
591 
592         struct it87_data *data = it87_update_device(dev);
593         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
594 }
595 
596 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
597                       const char *buf, size_t count)
598 {
599         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
600         int nr = sattr->nr;
601         int index = sattr->index;
602 
603         struct it87_data *data = dev_get_drvdata(dev);
604         unsigned long val;
605 
606         if (kstrtoul(buf, 10, &val) < 0)
607                 return -EINVAL;
608 
609         mutex_lock(&data->update_lock);
610         data->in[nr][index] = in_to_reg(data, nr, val);
611         it87_write_value(data,
612                          index == 1 ? IT87_REG_VIN_MIN(nr)
613                                     : IT87_REG_VIN_MAX(nr),
614                          data->in[nr][index]);
615         mutex_unlock(&data->update_lock);
616         return count;
617 }
618 
619 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
620 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
621                             0, 1);
622 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
623                             0, 2);
624 
625 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
626 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
627                             1, 1);
628 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
629                             1, 2);
630 
631 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
632 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
633                             2, 1);
634 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
635                             2, 2);
636 
637 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
638 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
639                             3, 1);
640 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
641                             3, 2);
642 
643 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
644 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
645                             4, 1);
646 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
647                             4, 2);
648 
649 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
650 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
651                             5, 1);
652 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
653                             5, 2);
654 
655 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
656 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
657                             6, 1);
658 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
659                             6, 2);
660 
661 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
662 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
663                             7, 1);
664 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
665                             7, 2);
666 
667 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
668 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
669 
670 /* 3 temperatures */
671 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
672                          char *buf)
673 {
674         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
675         int nr = sattr->nr;
676         int index = sattr->index;
677         struct it87_data *data = it87_update_device(dev);
678 
679         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
680 }
681 
682 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
683                         const char *buf, size_t count)
684 {
685         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
686         int nr = sattr->nr;
687         int index = sattr->index;
688         struct it87_data *data = dev_get_drvdata(dev);
689         long val;
690         u8 reg, regval;
691 
692         if (kstrtol(buf, 10, &val) < 0)
693                 return -EINVAL;
694 
695         mutex_lock(&data->update_lock);
696 
697         switch (index) {
698         default:
699         case 1:
700                 reg = IT87_REG_TEMP_LOW(nr);
701                 break;
702         case 2:
703                 reg = IT87_REG_TEMP_HIGH(nr);
704                 break;
705         case 3:
706                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
707                 if (!(regval & 0x80)) {
708                         regval |= 0x80;
709                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
710                 }
711                 data->valid = 0;
712                 reg = IT87_REG_TEMP_OFFSET[nr];
713                 break;
714         }
715 
716         data->temp[nr][index] = TEMP_TO_REG(val);
717         it87_write_value(data, reg, data->temp[nr][index]);
718         mutex_unlock(&data->update_lock);
719         return count;
720 }
721 
722 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
723 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
724                             0, 1);
725 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
726                             0, 2);
727 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
728                             set_temp, 0, 3);
729 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
730 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
731                             1, 1);
732 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
733                             1, 2);
734 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
735                             set_temp, 1, 3);
736 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
737 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
738                             2, 1);
739 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
740                             2, 2);
741 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
742                             set_temp, 2, 3);
743 
744 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
745                               char *buf)
746 {
747         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
748         int nr = sensor_attr->index;
749         struct it87_data *data = it87_update_device(dev);
750         u8 reg = data->sensor;      /* In case value is updated while used */
751         u8 extra = data->extra;
752 
753         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
754             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
755                 return sprintf(buf, "6\n");  /* Intel PECI */
756         if (reg & (1 << nr))
757                 return sprintf(buf, "3\n");  /* thermal diode */
758         if (reg & (8 << nr))
759                 return sprintf(buf, "4\n");  /* thermistor */
760         return sprintf(buf, "\n");      /* disabled */
761 }
762 
763 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
764                              const char *buf, size_t count)
765 {
766         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
767         int nr = sensor_attr->index;
768 
769         struct it87_data *data = dev_get_drvdata(dev);
770         long val;
771         u8 reg, extra;
772 
773         if (kstrtol(buf, 10, &val) < 0)
774                 return -EINVAL;
775 
776         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
777         reg &= ~(1 << nr);
778         reg &= ~(8 << nr);
779         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
780                 reg &= 0x3f;
781         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
782         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
783                 extra &= 0x7f;
784         if (val == 2) { /* backwards compatibility */
785                 dev_warn(dev,
786                          "Sensor type 2 is deprecated, please use 4 instead\n");
787                 val = 4;
788         }
789         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
790         if (val == 3)
791                 reg |= 1 << nr;
792         else if (val == 4)
793                 reg |= 8 << nr;
794         else if (has_temp_peci(data, nr) && val == 6)
795                 reg |= (nr + 1) << 6;
796         else if (has_temp_old_peci(data, nr) && val == 6)
797                 extra |= 0x80;
798         else if (val != 0)
799                 return -EINVAL;
800 
801         mutex_lock(&data->update_lock);
802         data->sensor = reg;
803         data->extra = extra;
804         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
805         if (has_temp_old_peci(data, nr))
806                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
807         data->valid = 0;        /* Force cache refresh */
808         mutex_unlock(&data->update_lock);
809         return count;
810 }
811 
812 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
813                           set_temp_type, 0);
814 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
815                           set_temp_type, 1);
816 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
817                           set_temp_type, 2);
818 
819 /* 3 Fans */
820 
821 static int pwm_mode(const struct it87_data *data, int nr)
822 {
823         int ctrl = data->fan_main_ctrl & (1 << nr);
824 
825         if (ctrl == 0 && data->type != it8603)          /* Full speed */
826                 return 0;
827         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
828                 return 2;
829         else                                            /* Manual mode */
830                 return 1;
831 }
832 
833 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
834                         char *buf)
835 {
836         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
837         int nr = sattr->nr;
838         int index = sattr->index;
839         int speed;
840         struct it87_data *data = it87_update_device(dev);
841 
842         speed = has_16bit_fans(data) ?
843                 FAN16_FROM_REG(data->fan[nr][index]) :
844                 FAN_FROM_REG(data->fan[nr][index],
845                              DIV_FROM_REG(data->fan_div[nr]));
846         return sprintf(buf, "%d\n", speed);
847 }
848 
849 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
850                 char *buf)
851 {
852         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
853         int nr = sensor_attr->index;
854 
855         struct it87_data *data = it87_update_device(dev);
856         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
857 }
858 static ssize_t show_pwm_enable(struct device *dev,
859                 struct device_attribute *attr, char *buf)
860 {
861         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
862         int nr = sensor_attr->index;
863 
864         struct it87_data *data = it87_update_device(dev);
865         return sprintf(buf, "%d\n", pwm_mode(data, nr));
866 }
867 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
868                 char *buf)
869 {
870         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
871         int nr = sensor_attr->index;
872 
873         struct it87_data *data = it87_update_device(dev);
874         return sprintf(buf, "%d\n",
875                        pwm_from_reg(data, data->pwm_duty[nr]));
876 }
877 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
878                 char *buf)
879 {
880         struct it87_data *data = it87_update_device(dev);
881         int index = (data->fan_ctl >> 4) & 0x07;
882         unsigned int freq;
883 
884         freq = pwm_freq[index] / (has_newer_autopwm(data) ? 256 : 128);
885 
886         return sprintf(buf, "%u\n", freq);
887 }
888 
889 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
890                        const char *buf, size_t count)
891 {
892         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
893         int nr = sattr->nr;
894         int index = sattr->index;
895 
896         struct it87_data *data = dev_get_drvdata(dev);
897         long val;
898         u8 reg;
899 
900         if (kstrtol(buf, 10, &val) < 0)
901                 return -EINVAL;
902 
903         mutex_lock(&data->update_lock);
904 
905         if (has_16bit_fans(data)) {
906                 data->fan[nr][index] = FAN16_TO_REG(val);
907                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
908                                  data->fan[nr][index] & 0xff);
909                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
910                                  data->fan[nr][index] >> 8);
911         } else {
912                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
913                 switch (nr) {
914                 case 0:
915                         data->fan_div[nr] = reg & 0x07;
916                         break;
917                 case 1:
918                         data->fan_div[nr] = (reg >> 3) & 0x07;
919                         break;
920                 case 2:
921                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
922                         break;
923                 }
924                 data->fan[nr][index] =
925                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
926                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
927                                  data->fan[nr][index]);
928         }
929 
930         mutex_unlock(&data->update_lock);
931         return count;
932 }
933 
934 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
935                 const char *buf, size_t count)
936 {
937         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
938         int nr = sensor_attr->index;
939 
940         struct it87_data *data = dev_get_drvdata(dev);
941         unsigned long val;
942         int min;
943         u8 old;
944 
945         if (kstrtoul(buf, 10, &val) < 0)
946                 return -EINVAL;
947 
948         mutex_lock(&data->update_lock);
949         old = it87_read_value(data, IT87_REG_FAN_DIV);
950 
951         /* Save fan min limit */
952         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
953 
954         switch (nr) {
955         case 0:
956         case 1:
957                 data->fan_div[nr] = DIV_TO_REG(val);
958                 break;
959         case 2:
960                 if (val < 8)
961                         data->fan_div[nr] = 1;
962                 else
963                         data->fan_div[nr] = 3;
964         }
965         val = old & 0x80;
966         val |= (data->fan_div[0] & 0x07);
967         val |= (data->fan_div[1] & 0x07) << 3;
968         if (data->fan_div[2] == 3)
969                 val |= 0x1 << 6;
970         it87_write_value(data, IT87_REG_FAN_DIV, val);
971 
972         /* Restore fan min limit */
973         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
974         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
975 
976         mutex_unlock(&data->update_lock);
977         return count;
978 }
979 
980 /* Returns 0 if OK, -EINVAL otherwise */
981 static int check_trip_points(struct device *dev, int nr)
982 {
983         const struct it87_data *data = dev_get_drvdata(dev);
984         int i, err = 0;
985 
986         if (has_old_autopwm(data)) {
987                 for (i = 0; i < 3; i++) {
988                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
989                                 err = -EINVAL;
990                 }
991                 for (i = 0; i < 2; i++) {
992                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
993                                 err = -EINVAL;
994                 }
995         }
996 
997         if (err) {
998                 dev_err(dev,
999                         "Inconsistent trip points, not switching to automatic mode\n");
1000                 dev_err(dev, "Adjust the trip points and try again\n");
1001         }
1002         return err;
1003 }
1004 
1005 static ssize_t set_pwm_enable(struct device *dev,
1006                 struct device_attribute *attr, const char *buf, size_t count)
1007 {
1008         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1009         int nr = sensor_attr->index;
1010 
1011         struct it87_data *data = dev_get_drvdata(dev);
1012         long val;
1013 
1014         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
1015                 return -EINVAL;
1016 
1017         /* Check trip points before switching to automatic mode */
1018         if (val == 2) {
1019                 if (check_trip_points(dev, nr) < 0)
1020                         return -EINVAL;
1021         }
1022 
1023         /* IT8603E does not have on/off mode */
1024         if (val == 0 && data->type == it8603)
1025                 return -EINVAL;
1026 
1027         mutex_lock(&data->update_lock);
1028 
1029         if (val == 0) {
1030                 int tmp;
1031                 /* make sure the fan is on when in on/off mode */
1032                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1033                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
1034                 /* set on/off mode */
1035                 data->fan_main_ctrl &= ~(1 << nr);
1036                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1037                                  data->fan_main_ctrl);
1038         } else {
1039                 if (val == 1)                           /* Manual mode */
1040                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
1041                                              data->pwm_temp_map[nr] :
1042                                              data->pwm_duty[nr];
1043                 else                                    /* Automatic mode */
1044                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1045                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1046 
1047                 if (data->type != it8603) {
1048                         /* set SmartGuardian mode */
1049                         data->fan_main_ctrl |= (1 << nr);
1050                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1051                                          data->fan_main_ctrl);
1052                 }
1053         }
1054 
1055         mutex_unlock(&data->update_lock);
1056         return count;
1057 }
1058 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
1059                 const char *buf, size_t count)
1060 {
1061         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1062         int nr = sensor_attr->index;
1063 
1064         struct it87_data *data = dev_get_drvdata(dev);
1065         long val;
1066 
1067         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1068                 return -EINVAL;
1069 
1070         mutex_lock(&data->update_lock);
1071         if (has_newer_autopwm(data)) {
1072                 /*
1073                  * If we are in automatic mode, the PWM duty cycle register
1074                  * is read-only so we can't write the value.
1075                  */
1076                 if (data->pwm_ctrl[nr] & 0x80) {
1077                         mutex_unlock(&data->update_lock);
1078                         return -EBUSY;
1079                 }
1080                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1081                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1082                                  data->pwm_duty[nr]);
1083         } else {
1084                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1085                 /*
1086                  * If we are in manual mode, write the duty cycle immediately;
1087                  * otherwise, just store it for later use.
1088                  */
1089                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1090                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1091                         it87_write_value(data, IT87_REG_PWM(nr),
1092                                          data->pwm_ctrl[nr]);
1093                 }
1094         }
1095         mutex_unlock(&data->update_lock);
1096         return count;
1097 }
1098 static ssize_t set_pwm_freq(struct device *dev,
1099                 struct device_attribute *attr, const char *buf, size_t count)
1100 {
1101         struct it87_data *data = dev_get_drvdata(dev);
1102         unsigned long val;
1103         int i;
1104 
1105         if (kstrtoul(buf, 10, &val) < 0)
1106                 return -EINVAL;
1107 
1108         val = clamp_val(val, 0, 1000000);
1109         val *= has_newer_autopwm(data) ? 256 : 128;
1110 
1111         /* Search for the nearest available frequency */
1112         for (i = 0; i < 7; i++) {
1113                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1114                         break;
1115         }
1116 
1117         mutex_lock(&data->update_lock);
1118         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1119         data->fan_ctl |= i << 4;
1120         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1121         mutex_unlock(&data->update_lock);
1122 
1123         return count;
1124 }
1125 static ssize_t show_pwm_temp_map(struct device *dev,
1126                 struct device_attribute *attr, char *buf)
1127 {
1128         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1129         int nr = sensor_attr->index;
1130 
1131         struct it87_data *data = it87_update_device(dev);
1132         int map;
1133 
1134         if (data->pwm_temp_map[nr] < 3)
1135                 map = 1 << data->pwm_temp_map[nr];
1136         else
1137                 map = 0;                        /* Should never happen */
1138         return sprintf(buf, "%d\n", map);
1139 }
1140 static ssize_t set_pwm_temp_map(struct device *dev,
1141                 struct device_attribute *attr, const char *buf, size_t count)
1142 {
1143         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1144         int nr = sensor_attr->index;
1145 
1146         struct it87_data *data = dev_get_drvdata(dev);
1147         long val;
1148         u8 reg;
1149 
1150         /*
1151          * This check can go away if we ever support automatic fan speed
1152          * control on newer chips.
1153          */
1154         if (!has_old_autopwm(data)) {
1155                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1156                 return -EINVAL;
1157         }
1158 
1159         if (kstrtol(buf, 10, &val) < 0)
1160                 return -EINVAL;
1161 
1162         switch (val) {
1163         case (1 << 0):
1164                 reg = 0x00;
1165                 break;
1166         case (1 << 1):
1167                 reg = 0x01;
1168                 break;
1169         case (1 << 2):
1170                 reg = 0x02;
1171                 break;
1172         default:
1173                 return -EINVAL;
1174         }
1175 
1176         mutex_lock(&data->update_lock);
1177         data->pwm_temp_map[nr] = reg;
1178         /*
1179          * If we are in automatic mode, write the temp mapping immediately;
1180          * otherwise, just store it for later use.
1181          */
1182         if (data->pwm_ctrl[nr] & 0x80) {
1183                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1184                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1185         }
1186         mutex_unlock(&data->update_lock);
1187         return count;
1188 }
1189 
1190 static ssize_t show_auto_pwm(struct device *dev,
1191                 struct device_attribute *attr, char *buf)
1192 {
1193         struct it87_data *data = it87_update_device(dev);
1194         struct sensor_device_attribute_2 *sensor_attr =
1195                         to_sensor_dev_attr_2(attr);
1196         int nr = sensor_attr->nr;
1197         int point = sensor_attr->index;
1198 
1199         return sprintf(buf, "%d\n",
1200                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1201 }
1202 
1203 static ssize_t set_auto_pwm(struct device *dev,
1204                 struct device_attribute *attr, const char *buf, size_t count)
1205 {
1206         struct it87_data *data = dev_get_drvdata(dev);
1207         struct sensor_device_attribute_2 *sensor_attr =
1208                         to_sensor_dev_attr_2(attr);
1209         int nr = sensor_attr->nr;
1210         int point = sensor_attr->index;
1211         long val;
1212 
1213         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1214                 return -EINVAL;
1215 
1216         mutex_lock(&data->update_lock);
1217         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1218         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1219                          data->auto_pwm[nr][point]);
1220         mutex_unlock(&data->update_lock);
1221         return count;
1222 }
1223 
1224 static ssize_t show_auto_temp(struct device *dev,
1225                 struct device_attribute *attr, char *buf)
1226 {
1227         struct it87_data *data = it87_update_device(dev);
1228         struct sensor_device_attribute_2 *sensor_attr =
1229                         to_sensor_dev_attr_2(attr);
1230         int nr = sensor_attr->nr;
1231         int point = sensor_attr->index;
1232 
1233         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1234 }
1235 
1236 static ssize_t set_auto_temp(struct device *dev,
1237                 struct device_attribute *attr, const char *buf, size_t count)
1238 {
1239         struct it87_data *data = dev_get_drvdata(dev);
1240         struct sensor_device_attribute_2 *sensor_attr =
1241                         to_sensor_dev_attr_2(attr);
1242         int nr = sensor_attr->nr;
1243         int point = sensor_attr->index;
1244         long val;
1245 
1246         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1247                 return -EINVAL;
1248 
1249         mutex_lock(&data->update_lock);
1250         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1251         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1252                          data->auto_temp[nr][point]);
1253         mutex_unlock(&data->update_lock);
1254         return count;
1255 }
1256 
1257 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1258 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1259                             0, 1);
1260 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1261                           set_fan_div, 0);
1262 
1263 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1264 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1265                             1, 1);
1266 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1267                           set_fan_div, 1);
1268 
1269 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1270 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1271                             2, 1);
1272 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1273                           set_fan_div, 2);
1274 
1275 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1276 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1277                             3, 1);
1278 
1279 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1280 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1281                             4, 1);
1282 
1283 static SENSOR_DEVICE_ATTR_2(fan6_input, S_IRUGO, show_fan, NULL, 5, 0);
1284 static SENSOR_DEVICE_ATTR_2(fan6_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1285                             5, 1);
1286 
1287 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1288                           show_pwm_enable, set_pwm_enable, 0);
1289 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1290 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1291 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1292                           show_pwm_temp_map, set_pwm_temp_map, 0);
1293 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1294                             show_auto_pwm, set_auto_pwm, 0, 0);
1295 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1296                             show_auto_pwm, set_auto_pwm, 0, 1);
1297 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1298                             show_auto_pwm, set_auto_pwm, 0, 2);
1299 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1300                             show_auto_pwm, NULL, 0, 3);
1301 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1302                             show_auto_temp, set_auto_temp, 0, 1);
1303 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1304                             show_auto_temp, set_auto_temp, 0, 0);
1305 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1306                             show_auto_temp, set_auto_temp, 0, 2);
1307 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1308                             show_auto_temp, set_auto_temp, 0, 3);
1309 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1310                             show_auto_temp, set_auto_temp, 0, 4);
1311 
1312 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1313                           show_pwm_enable, set_pwm_enable, 1);
1314 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1315 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1316 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1317                           show_pwm_temp_map, set_pwm_temp_map, 1);
1318 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1319                             show_auto_pwm, set_auto_pwm, 1, 0);
1320 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1321                             show_auto_pwm, set_auto_pwm, 1, 1);
1322 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1323                             show_auto_pwm, set_auto_pwm, 1, 2);
1324 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1325                             show_auto_pwm, NULL, 1, 3);
1326 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1327                             show_auto_temp, set_auto_temp, 1, 1);
1328 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1329                             show_auto_temp, set_auto_temp, 1, 0);
1330 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1331                             show_auto_temp, set_auto_temp, 1, 2);
1332 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1333                             show_auto_temp, set_auto_temp, 1, 3);
1334 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1335                             show_auto_temp, set_auto_temp, 1, 4);
1336 
1337 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1338                           show_pwm_enable, set_pwm_enable, 2);
1339 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1340 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1341 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1342                           show_pwm_temp_map, set_pwm_temp_map, 2);
1343 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1344                             show_auto_pwm, set_auto_pwm, 2, 0);
1345 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1346                             show_auto_pwm, set_auto_pwm, 2, 1);
1347 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1348                             show_auto_pwm, set_auto_pwm, 2, 2);
1349 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1350                             show_auto_pwm, NULL, 2, 3);
1351 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1352                             show_auto_temp, set_auto_temp, 2, 1);
1353 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1354                             show_auto_temp, set_auto_temp, 2, 0);
1355 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1356                             show_auto_temp, set_auto_temp, 2, 2);
1357 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1358                             show_auto_temp, set_auto_temp, 2, 3);
1359 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1360                             show_auto_temp, set_auto_temp, 2, 4);
1361 
1362 /* Alarms */
1363 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1364                 char *buf)
1365 {
1366         struct it87_data *data = it87_update_device(dev);
1367         return sprintf(buf, "%u\n", data->alarms);
1368 }
1369 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1370 
1371 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1372                 char *buf)
1373 {
1374         int bitnr = to_sensor_dev_attr(attr)->index;
1375         struct it87_data *data = it87_update_device(dev);
1376         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1377 }
1378 
1379 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1380                 *attr, const char *buf, size_t count)
1381 {
1382         struct it87_data *data = dev_get_drvdata(dev);
1383         long val;
1384         int config;
1385 
1386         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1387                 return -EINVAL;
1388 
1389         mutex_lock(&data->update_lock);
1390         config = it87_read_value(data, IT87_REG_CONFIG);
1391         if (config < 0) {
1392                 count = config;
1393         } else {
1394                 config |= 1 << 5;
1395                 it87_write_value(data, IT87_REG_CONFIG, config);
1396                 /* Invalidate cache to force re-read */
1397                 data->valid = 0;
1398         }
1399         mutex_unlock(&data->update_lock);
1400 
1401         return count;
1402 }
1403 
1404 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1405 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1406 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1407 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1408 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1409 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1410 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1411 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1412 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1413 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1414 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1415 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1416 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1417 static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 7);
1418 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1419 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1420 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1421 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1422                           show_alarm, clear_intrusion, 4);
1423 
1424 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1425                 char *buf)
1426 {
1427         int bitnr = to_sensor_dev_attr(attr)->index;
1428         struct it87_data *data = it87_update_device(dev);
1429         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1430 }
1431 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1432                 const char *buf, size_t count)
1433 {
1434         int bitnr = to_sensor_dev_attr(attr)->index;
1435         struct it87_data *data = dev_get_drvdata(dev);
1436         long val;
1437 
1438         if (kstrtol(buf, 10, &val) < 0
1439          || (val != 0 && val != 1))
1440                 return -EINVAL;
1441 
1442         mutex_lock(&data->update_lock);
1443         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1444         if (val)
1445                 data->beeps |= (1 << bitnr);
1446         else
1447                 data->beeps &= ~(1 << bitnr);
1448         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1449         mutex_unlock(&data->update_lock);
1450         return count;
1451 }
1452 
1453 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1454                           show_beep, set_beep, 1);
1455 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1456 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1457 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1458 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1459 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1460 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1461 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1462 /* fanX_beep writability is set later */
1463 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1464 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1465 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1466 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1467 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1468 static SENSOR_DEVICE_ATTR(fan6_beep, S_IRUGO, show_beep, set_beep, 0);
1469 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1470                           show_beep, set_beep, 2);
1471 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1472 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1473 
1474 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1475                 char *buf)
1476 {
1477         struct it87_data *data = dev_get_drvdata(dev);
1478         return sprintf(buf, "%u\n", data->vrm);
1479 }
1480 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1481                 const char *buf, size_t count)
1482 {
1483         struct it87_data *data = dev_get_drvdata(dev);
1484         unsigned long val;
1485 
1486         if (kstrtoul(buf, 10, &val) < 0)
1487                 return -EINVAL;
1488 
1489         data->vrm = val;
1490 
1491         return count;
1492 }
1493 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1494 
1495 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1496                 char *buf)
1497 {
1498         struct it87_data *data = it87_update_device(dev);
1499         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1500 }
1501 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1502 
1503 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1504                 char *buf)
1505 {
1506         static const char * const labels[] = {
1507                 "+5V",
1508                 "5VSB",
1509                 "Vbat",
1510         };
1511         static const char * const labels_it8721[] = {
1512                 "+3.3V",
1513                 "3VSB",
1514                 "Vbat",
1515         };
1516         struct it87_data *data = dev_get_drvdata(dev);
1517         int nr = to_sensor_dev_attr(attr)->index;
1518 
1519         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1520                                                        : labels[nr]);
1521 }
1522 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1523 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1524 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1525 /* special AVCC3 IT8603E in9 */
1526 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1527 
1528 static ssize_t show_name(struct device *dev, struct device_attribute
1529                          *devattr, char *buf)
1530 {
1531         struct it87_data *data = dev_get_drvdata(dev);
1532         return sprintf(buf, "%s\n", data->name);
1533 }
1534 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1535 
1536 static struct attribute *it87_attributes_in[10][5] = {
1537 {
1538         &sensor_dev_attr_in0_input.dev_attr.attr,
1539         &sensor_dev_attr_in0_min.dev_attr.attr,
1540         &sensor_dev_attr_in0_max.dev_attr.attr,
1541         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1542         NULL
1543 }, {
1544         &sensor_dev_attr_in1_input.dev_attr.attr,
1545         &sensor_dev_attr_in1_min.dev_attr.attr,
1546         &sensor_dev_attr_in1_max.dev_attr.attr,
1547         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1548         NULL
1549 }, {
1550         &sensor_dev_attr_in2_input.dev_attr.attr,
1551         &sensor_dev_attr_in2_min.dev_attr.attr,
1552         &sensor_dev_attr_in2_max.dev_attr.attr,
1553         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1554         NULL
1555 }, {
1556         &sensor_dev_attr_in3_input.dev_attr.attr,
1557         &sensor_dev_attr_in3_min.dev_attr.attr,
1558         &sensor_dev_attr_in3_max.dev_attr.attr,
1559         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1560         NULL
1561 }, {
1562         &sensor_dev_attr_in4_input.dev_attr.attr,
1563         &sensor_dev_attr_in4_min.dev_attr.attr,
1564         &sensor_dev_attr_in4_max.dev_attr.attr,
1565         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1566         NULL
1567 }, {
1568         &sensor_dev_attr_in5_input.dev_attr.attr,
1569         &sensor_dev_attr_in5_min.dev_attr.attr,
1570         &sensor_dev_attr_in5_max.dev_attr.attr,
1571         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1572         NULL
1573 }, {
1574         &sensor_dev_attr_in6_input.dev_attr.attr,
1575         &sensor_dev_attr_in6_min.dev_attr.attr,
1576         &sensor_dev_attr_in6_max.dev_attr.attr,
1577         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1578         NULL
1579 }, {
1580         &sensor_dev_attr_in7_input.dev_attr.attr,
1581         &sensor_dev_attr_in7_min.dev_attr.attr,
1582         &sensor_dev_attr_in7_max.dev_attr.attr,
1583         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1584         NULL
1585 }, {
1586         &sensor_dev_attr_in8_input.dev_attr.attr,
1587         NULL
1588 }, {
1589         &sensor_dev_attr_in9_input.dev_attr.attr,
1590         NULL
1591 } };
1592 
1593 static const struct attribute_group it87_group_in[10] = {
1594         { .attrs = it87_attributes_in[0] },
1595         { .attrs = it87_attributes_in[1] },
1596         { .attrs = it87_attributes_in[2] },
1597         { .attrs = it87_attributes_in[3] },
1598         { .attrs = it87_attributes_in[4] },
1599         { .attrs = it87_attributes_in[5] },
1600         { .attrs = it87_attributes_in[6] },
1601         { .attrs = it87_attributes_in[7] },
1602         { .attrs = it87_attributes_in[8] },
1603         { .attrs = it87_attributes_in[9] },
1604 };
1605 
1606 static struct attribute *it87_attributes_temp[3][6] = {
1607 {
1608         &sensor_dev_attr_temp1_input.dev_attr.attr,
1609         &sensor_dev_attr_temp1_max.dev_attr.attr,
1610         &sensor_dev_attr_temp1_min.dev_attr.attr,
1611         &sensor_dev_attr_temp1_type.dev_attr.attr,
1612         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1613         NULL
1614 } , {
1615         &sensor_dev_attr_temp2_input.dev_attr.attr,
1616         &sensor_dev_attr_temp2_max.dev_attr.attr,
1617         &sensor_dev_attr_temp2_min.dev_attr.attr,
1618         &sensor_dev_attr_temp2_type.dev_attr.attr,
1619         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1620         NULL
1621 } , {
1622         &sensor_dev_attr_temp3_input.dev_attr.attr,
1623         &sensor_dev_attr_temp3_max.dev_attr.attr,
1624         &sensor_dev_attr_temp3_min.dev_attr.attr,
1625         &sensor_dev_attr_temp3_type.dev_attr.attr,
1626         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1627         NULL
1628 } };
1629 
1630 static const struct attribute_group it87_group_temp[3] = {
1631         { .attrs = it87_attributes_temp[0] },
1632         { .attrs = it87_attributes_temp[1] },
1633         { .attrs = it87_attributes_temp[2] },
1634 };
1635 
1636 static struct attribute *it87_attributes_temp_offset[] = {
1637         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1638         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1639         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1640 };
1641 
1642 static struct attribute *it87_attributes[] = {
1643         &dev_attr_alarms.attr,
1644         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1645         &dev_attr_name.attr,
1646         NULL
1647 };
1648 
1649 static const struct attribute_group it87_group = {
1650         .attrs = it87_attributes,
1651 };
1652 
1653 static struct attribute *it87_attributes_in_beep[] = {
1654         &sensor_dev_attr_in0_beep.dev_attr.attr,
1655         &sensor_dev_attr_in1_beep.dev_attr.attr,
1656         &sensor_dev_attr_in2_beep.dev_attr.attr,
1657         &sensor_dev_attr_in3_beep.dev_attr.attr,
1658         &sensor_dev_attr_in4_beep.dev_attr.attr,
1659         &sensor_dev_attr_in5_beep.dev_attr.attr,
1660         &sensor_dev_attr_in6_beep.dev_attr.attr,
1661         &sensor_dev_attr_in7_beep.dev_attr.attr,
1662         NULL,
1663         NULL,
1664 };
1665 
1666 static struct attribute *it87_attributes_temp_beep[] = {
1667         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1668         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1669         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1670 };
1671 
1672 static struct attribute *it87_attributes_fan[6][3+1] = { {
1673         &sensor_dev_attr_fan1_input.dev_attr.attr,
1674         &sensor_dev_attr_fan1_min.dev_attr.attr,
1675         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1676         NULL
1677 }, {
1678         &sensor_dev_attr_fan2_input.dev_attr.attr,
1679         &sensor_dev_attr_fan2_min.dev_attr.attr,
1680         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1681         NULL
1682 }, {
1683         &sensor_dev_attr_fan3_input.dev_attr.attr,
1684         &sensor_dev_attr_fan3_min.dev_attr.attr,
1685         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1686         NULL
1687 }, {
1688         &sensor_dev_attr_fan4_input.dev_attr.attr,
1689         &sensor_dev_attr_fan4_min.dev_attr.attr,
1690         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1691         NULL
1692 }, {
1693         &sensor_dev_attr_fan5_input.dev_attr.attr,
1694         &sensor_dev_attr_fan5_min.dev_attr.attr,
1695         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1696         NULL
1697 }, {
1698         &sensor_dev_attr_fan6_input.dev_attr.attr,
1699         &sensor_dev_attr_fan6_min.dev_attr.attr,
1700         &sensor_dev_attr_fan6_alarm.dev_attr.attr,
1701         NULL
1702 } };
1703 
1704 static const struct attribute_group it87_group_fan[6] = {
1705         { .attrs = it87_attributes_fan[0] },
1706         { .attrs = it87_attributes_fan[1] },
1707         { .attrs = it87_attributes_fan[2] },
1708         { .attrs = it87_attributes_fan[3] },
1709         { .attrs = it87_attributes_fan[4] },
1710         { .attrs = it87_attributes_fan[5] },
1711 };
1712 
1713 static const struct attribute *it87_attributes_fan_div[] = {
1714         &sensor_dev_attr_fan1_div.dev_attr.attr,
1715         &sensor_dev_attr_fan2_div.dev_attr.attr,
1716         &sensor_dev_attr_fan3_div.dev_attr.attr,
1717 };
1718 
1719 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1720         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1721         &sensor_dev_attr_pwm1.dev_attr.attr,
1722         &dev_attr_pwm1_freq.attr,
1723         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1724         NULL
1725 }, {
1726         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1727         &sensor_dev_attr_pwm2.dev_attr.attr,
1728         &dev_attr_pwm2_freq.attr,
1729         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1730         NULL
1731 }, {
1732         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1733         &sensor_dev_attr_pwm3.dev_attr.attr,
1734         &dev_attr_pwm3_freq.attr,
1735         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1736         NULL
1737 } };
1738 
1739 static const struct attribute_group it87_group_pwm[3] = {
1740         { .attrs = it87_attributes_pwm[0] },
1741         { .attrs = it87_attributes_pwm[1] },
1742         { .attrs = it87_attributes_pwm[2] },
1743 };
1744 
1745 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1746         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1747         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1748         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1749         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1750         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1751         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1752         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1753         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1754         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1755         NULL
1756 }, {
1757         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1758         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1759         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1760         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1761         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1762         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1763         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1764         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1765         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1766         NULL
1767 }, {
1768         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1769         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1770         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1771         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1772         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1773         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1774         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1775         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1776         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1777         NULL
1778 } };
1779 
1780 static const struct attribute_group it87_group_autopwm[3] = {
1781         { .attrs = it87_attributes_autopwm[0] },
1782         { .attrs = it87_attributes_autopwm[1] },
1783         { .attrs = it87_attributes_autopwm[2] },
1784 };
1785 
1786 static struct attribute *it87_attributes_fan_beep[] = {
1787         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1788         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1789         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1790         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1791         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1792         &sensor_dev_attr_fan6_beep.dev_attr.attr,
1793 };
1794 
1795 static struct attribute *it87_attributes_vid[] = {
1796         &dev_attr_vrm.attr,
1797         &dev_attr_cpu0_vid.attr,
1798         NULL
1799 };
1800 
1801 static const struct attribute_group it87_group_vid = {
1802         .attrs = it87_attributes_vid,
1803 };
1804 
1805 static struct attribute *it87_attributes_label[] = {
1806         &sensor_dev_attr_in3_label.dev_attr.attr,
1807         &sensor_dev_attr_in7_label.dev_attr.attr,
1808         &sensor_dev_attr_in8_label.dev_attr.attr,
1809         &sensor_dev_attr_in9_label.dev_attr.attr,
1810         NULL
1811 };
1812 
1813 static const struct attribute_group it87_group_label = {
1814         .attrs = it87_attributes_label,
1815 };
1816 
1817 /* SuperIO detection - will change isa_address if a chip is found */
1818 static int __init it87_find(unsigned short *address,
1819         struct it87_sio_data *sio_data)
1820 {
1821         int err;
1822         u16 chip_type;
1823         const char *board_vendor, *board_name;
1824         const struct it87_devices *config;
1825 
1826         err = superio_enter();
1827         if (err)
1828                 return err;
1829 
1830         err = -ENODEV;
1831         chip_type = force_id ? force_id : superio_inw(DEVID);
1832 
1833         switch (chip_type) {
1834         case IT8705F_DEVID:
1835                 sio_data->type = it87;
1836                 break;
1837         case IT8712F_DEVID:
1838                 sio_data->type = it8712;
1839                 break;
1840         case IT8716F_DEVID:
1841         case IT8726F_DEVID:
1842                 sio_data->type = it8716;
1843                 break;
1844         case IT8718F_DEVID:
1845                 sio_data->type = it8718;
1846                 break;
1847         case IT8720F_DEVID:
1848                 sio_data->type = it8720;
1849                 break;
1850         case IT8721F_DEVID:
1851                 sio_data->type = it8721;
1852                 break;
1853         case IT8728F_DEVID:
1854                 sio_data->type = it8728;
1855                 break;
1856         case IT8771E_DEVID:
1857                 sio_data->type = it8771;
1858                 break;
1859         case IT8772E_DEVID:
1860                 sio_data->type = it8772;
1861                 break;
1862         case IT8781F_DEVID:
1863                 sio_data->type = it8781;
1864                 break;
1865         case IT8782F_DEVID:
1866                 sio_data->type = it8782;
1867                 break;
1868         case IT8783E_DEVID:
1869                 sio_data->type = it8783;
1870                 break;
1871         case IT8786E_DEVID:
1872                 sio_data->type = it8786;
1873                 break;
1874         case IT8790E_DEVID:
1875                 sio_data->type = it8790;
1876                 break;
1877         case IT8603E_DEVID:
1878         case IT8623E_DEVID:
1879                 sio_data->type = it8603;
1880                 break;
1881         case IT8620E_DEVID:
1882                 sio_data->type = it8620;
1883                 break;
1884         case 0xffff:    /* No device at all */
1885                 goto exit;
1886         default:
1887                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1888                 goto exit;
1889         }
1890 
1891         superio_select(PME);
1892         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1893                 pr_info("Device not activated, skipping\n");
1894                 goto exit;
1895         }
1896 
1897         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1898         if (*address == 0) {
1899                 pr_info("Base address not set, skipping\n");
1900                 goto exit;
1901         }
1902 
1903         err = 0;
1904         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1905         pr_info("Found IT%04x%s chip at 0x%x, revision %d\n", chip_type,
1906                 it87_devices[sio_data->type].suffix,
1907                 *address, sio_data->revision);
1908 
1909         config = &it87_devices[sio_data->type];
1910 
1911         /* in7 (VSB or VCCH5V) is always internal on some chips */
1912         if (has_in7_internal(config))
1913                 sio_data->internal |= (1 << 1);
1914 
1915         /* in8 (Vbat) is always internal */
1916         sio_data->internal |= (1 << 2);
1917 
1918         /* Only the IT8603E has in9 */
1919         if (sio_data->type != it8603)
1920                 sio_data->skip_in |= (1 << 9);
1921 
1922         if (!has_vid(config))
1923                 sio_data->skip_vid = 1;
1924 
1925         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1926         if (sio_data->type == it87) {
1927                 /* The IT8705F has a different LD number for GPIO */
1928                 superio_select(5);
1929                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1930         } else if (sio_data->type == it8783) {
1931                 int reg25, reg27, reg2a, reg2c, regef;
1932 
1933                 superio_select(GPIO);
1934 
1935                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1936                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1937                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1938                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1939                 regef = superio_inb(IT87_SIO_SPI_REG);
1940 
1941                 /* Check if fan3 is there or not */
1942                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1943                         sio_data->skip_fan |= (1 << 2);
1944                 if ((reg25 & (1 << 4))
1945                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1946                         sio_data->skip_pwm |= (1 << 2);
1947 
1948                 /* Check if fan2 is there or not */
1949                 if (reg27 & (1 << 7))
1950                         sio_data->skip_fan |= (1 << 1);
1951                 if (reg27 & (1 << 3))
1952                         sio_data->skip_pwm |= (1 << 1);
1953 
1954                 /* VIN5 */
1955                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1956                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1957 
1958                 /* VIN6 */
1959                 if (reg27 & (1 << 1))
1960                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1961 
1962                 /*
1963                  * VIN7
1964                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1965                  */
1966                 if (reg27 & (1 << 2)) {
1967                         /*
1968                          * The data sheet is a bit unclear regarding the
1969                          * internal voltage divider for VCCH5V. It says
1970                          * "This bit enables and switches VIN7 (pin 91) to the
1971                          * internal voltage divider for VCCH5V".
1972                          * This is different to other chips, where the internal
1973                          * voltage divider would connect VIN7 to an internal
1974                          * voltage source. Maybe that is the case here as well.
1975                          *
1976                          * Since we don't know for sure, re-route it if that is
1977                          * not the case, and ask the user to report if the
1978                          * resulting voltage is sane.
1979                          */
1980                         if (!(reg2c & (1 << 1))) {
1981                                 reg2c |= (1 << 1);
1982                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
1983                                 pr_notice("Routing internal VCCH5V to in7.\n");
1984                         }
1985                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1986                         pr_notice("Please report if it displays a reasonable voltage.\n");
1987                 }
1988 
1989                 if (reg2c & (1 << 0))
1990                         sio_data->internal |= (1 << 0);
1991                 if (reg2c & (1 << 1))
1992                         sio_data->internal |= (1 << 1);
1993 
1994                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1995         } else if (sio_data->type == it8603) {
1996                 int reg27, reg29;
1997 
1998                 superio_select(GPIO);
1999 
2000                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
2001 
2002                 /* Check if fan3 is there or not */
2003                 if (reg27 & (1 << 6))
2004                         sio_data->skip_pwm |= (1 << 2);
2005                 if (reg27 & (1 << 7))
2006                         sio_data->skip_fan |= (1 << 2);
2007 
2008                 /* Check if fan2 is there or not */
2009                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
2010                 if (reg29 & (1 << 1))
2011                         sio_data->skip_pwm |= (1 << 1);
2012                 if (reg29 & (1 << 2))
2013                         sio_data->skip_fan |= (1 << 1);
2014 
2015                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
2016                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
2017 
2018                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
2019 
2020                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2021         } else if (sio_data->type == it8620) {
2022                 int reg;
2023 
2024                 superio_select(GPIO);
2025 
2026                 /* Check for fan4, fan5 */
2027                 reg = superio_inb(IT87_SIO_GPIO2_REG);
2028                 if (!(reg & (1 << 5)))
2029                         sio_data->skip_fan |= (1 << 3);
2030                 if (!(reg & (1 << 4)))
2031                         sio_data->skip_fan |= (1 << 4);
2032 
2033                 /* Check for pwm3, fan3 */
2034                 reg = superio_inb(IT87_SIO_GPIO3_REG);
2035                 if (reg & (1 << 6))
2036                         sio_data->skip_pwm |= (1 << 2);
2037                 if (reg & (1 << 7))
2038                         sio_data->skip_fan |= (1 << 2);
2039 
2040                 /* Check for pwm2, fan2 */
2041                 reg = superio_inb(IT87_SIO_GPIO5_REG);
2042                 if (reg & (1 << 1))
2043                         sio_data->skip_pwm |= (1 << 1);
2044                 if (reg & (1 << 2))
2045                         sio_data->skip_fan |= (1 << 1);
2046 
2047                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2048         } else {
2049                 int reg;
2050                 bool uart6;
2051 
2052                 superio_select(GPIO);
2053 
2054                 reg = superio_inb(IT87_SIO_GPIO3_REG);
2055                 if (!sio_data->skip_vid) {
2056                         /* We need at least 4 VID pins */
2057                         if (reg & 0x0f) {
2058                                 pr_info("VID is disabled (pins used for GPIO)\n");
2059                                 sio_data->skip_vid = 1;
2060                         }
2061                 }
2062 
2063                 /* Check if fan3 is there or not */
2064                 if (reg & (1 << 6))
2065                         sio_data->skip_pwm |= (1 << 2);
2066                 if (reg & (1 << 7))
2067                         sio_data->skip_fan |= (1 << 2);
2068 
2069                 /* Check if fan2 is there or not */
2070                 reg = superio_inb(IT87_SIO_GPIO5_REG);
2071                 if (reg & (1 << 1))
2072                         sio_data->skip_pwm |= (1 << 1);
2073                 if (reg & (1 << 2))
2074                         sio_data->skip_fan |= (1 << 1);
2075 
2076                 if ((sio_data->type == it8718 || sio_data->type == it8720)
2077                  && !(sio_data->skip_vid))
2078                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
2079 
2080                 reg = superio_inb(IT87_SIO_PINX2_REG);
2081 
2082                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
2083 
2084                 /*
2085                  * The IT8720F has no VIN7 pin, so VCCH should always be
2086                  * routed internally to VIN7 with an internal divider.
2087                  * Curiously, there still is a configuration bit to control
2088                  * this, which means it can be set incorrectly. And even
2089                  * more curiously, many boards out there are improperly
2090                  * configured, even though the IT8720F datasheet claims
2091                  * that the internal routing of VCCH to VIN7 is the default
2092                  * setting. So we force the internal routing in this case.
2093                  *
2094                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
2095                  * If UART6 is enabled, re-route VIN7 to the internal divider
2096                  * if that is not already the case.
2097                  */
2098                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
2099                         reg |= (1 << 1);
2100                         superio_outb(IT87_SIO_PINX2_REG, reg);
2101                         pr_notice("Routing internal VCCH to in7\n");
2102                 }
2103                 if (reg & (1 << 0))
2104                         sio_data->internal |= (1 << 0);
2105                 if (reg & (1 << 1))
2106                         sio_data->internal |= (1 << 1);
2107 
2108                 /*
2109                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
2110                  * While VIN7 can be routed to the internal voltage divider,
2111                  * VIN5 and VIN6 are not available if UART6 is enabled.
2112                  *
2113                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
2114                  * is the temperature source. Since we can not read the
2115                  * temperature source here, skip_temp is preliminary.
2116                  */
2117                 if (uart6) {
2118                         sio_data->skip_in |= (1 << 5) | (1 << 6);
2119                         sio_data->skip_temp |= (1 << 2);
2120                 }
2121 
2122                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2123         }
2124         if (sio_data->beep_pin)
2125                 pr_info("Beeping is supported\n");
2126 
2127         /* Disable specific features based on DMI strings */
2128         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2129         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2130         if (board_vendor && board_name) {
2131                 if (strcmp(board_vendor, "nVIDIA") == 0
2132                  && strcmp(board_name, "FN68PT") == 0) {
2133                         /*
2134                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2135                          * connected to a fan, but to something else. One user
2136                          * has reported instant system power-off when changing
2137                          * the PWM2 duty cycle, so we disable it.
2138                          * I use the board name string as the trigger in case
2139                          * the same board is ever used in other systems.
2140                          */
2141                         pr_info("Disabling pwm2 due to hardware constraints\n");
2142                         sio_data->skip_pwm = (1 << 1);
2143                 }
2144         }
2145 
2146 exit:
2147         superio_exit();
2148         return err;
2149 }
2150 
2151 static void it87_remove_files(struct device *dev)
2152 {
2153         struct it87_data *data = platform_get_drvdata(pdev);
2154         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2155         int i;
2156 
2157         sysfs_remove_group(&dev->kobj, &it87_group);
2158         for (i = 0; i < 10; i++) {
2159                 if (sio_data->skip_in & (1 << i))
2160                         continue;
2161                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2162                 if (it87_attributes_in_beep[i])
2163                         sysfs_remove_file(&dev->kobj,
2164                                           it87_attributes_in_beep[i]);
2165         }
2166         for (i = 0; i < 3; i++) {
2167                 if (!(data->has_temp & (1 << i)))
2168                         continue;
2169                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2170                 if (has_temp_offset(data))
2171                         sysfs_remove_file(&dev->kobj,
2172                                           it87_attributes_temp_offset[i]);
2173                 if (sio_data->beep_pin)
2174                         sysfs_remove_file(&dev->kobj,
2175                                           it87_attributes_temp_beep[i]);
2176         }
2177         for (i = 0; i < 6; i++) {
2178                 if (!(data->has_fan & (1 << i)))
2179                         continue;
2180                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2181                 if (sio_data->beep_pin)
2182                         sysfs_remove_file(&dev->kobj,
2183                                           it87_attributes_fan_beep[i]);
2184                 if (i < 3 && !has_16bit_fans(data))
2185                         sysfs_remove_file(&dev->kobj,
2186                                           it87_attributes_fan_div[i]);
2187         }
2188         for (i = 0; i < 3; i++) {
2189                 if (sio_data->skip_pwm & (1 << i))
2190                         continue;
2191                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2192                 if (has_old_autopwm(data))
2193                         sysfs_remove_group(&dev->kobj,
2194                                            &it87_group_autopwm[i]);
2195         }
2196         if (!sio_data->skip_vid)
2197                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2198         sysfs_remove_group(&dev->kobj, &it87_group_label);
2199 }
2200 
2201 static int it87_probe(struct platform_device *pdev)
2202 {
2203         struct it87_data *data;
2204         struct resource *res;
2205         struct device *dev = &pdev->dev;
2206         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2207         int err = 0, i;
2208         int enable_pwm_interface;
2209         int fan_beep_need_rw;
2210 
2211         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2212         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2213                                  DRVNAME)) {
2214                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2215                         (unsigned long)res->start,
2216                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2217                 return -EBUSY;
2218         }
2219 
2220         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2221         if (!data)
2222                 return -ENOMEM;
2223 
2224         data->addr = res->start;
2225         data->type = sio_data->type;
2226         data->features = it87_devices[sio_data->type].features;
2227         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2228         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2229         data->name = it87_devices[sio_data->type].name;
2230         /*
2231          * IT8705F Datasheet 0.4.1, 3h == Version G.
2232          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2233          * These are the first revisions with 16-bit tachometer support.
2234          */
2235         switch (data->type) {
2236         case it87:
2237                 if (sio_data->revision >= 0x03) {
2238                         data->features &= ~FEAT_OLD_AUTOPWM;
2239                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS;
2240                 }
2241                 break;
2242         case it8712:
2243                 if (sio_data->revision >= 0x08) {
2244                         data->features &= ~FEAT_OLD_AUTOPWM;
2245                         data->features |= FEAT_FAN16_CONFIG | FEAT_16BIT_FANS |
2246                                           FEAT_FIVE_FANS;
2247                 }
2248                 break;
2249         default:
2250                 break;
2251         }
2252 
2253         /* Now, we do the remaining detection. */
2254         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2255          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2256                 return -ENODEV;
2257 
2258         platform_set_drvdata(pdev, data);
2259 
2260         mutex_init(&data->update_lock);
2261 
2262         /* Check PWM configuration */
2263         enable_pwm_interface = it87_check_pwm(dev);
2264 
2265         /* Starting with IT8721F, we handle scaling of internal voltages */
2266         if (has_12mv_adc(data)) {
2267                 if (sio_data->internal & (1 << 0))
2268                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2269                 if (sio_data->internal & (1 << 1))
2270                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2271                 if (sio_data->internal & (1 << 2))
2272                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2273                 if (sio_data->internal & (1 << 3))
2274                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2275         } else if (sio_data->type == it8781 || sio_data->type == it8782 ||
2276                    sio_data->type == it8783) {
2277                 if (sio_data->internal & (1 << 0))
2278                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2279                 if (sio_data->internal & (1 << 1))
2280                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2281         }
2282 
2283         data->has_temp = 0x07;
2284         if (sio_data->skip_temp & (1 << 2)) {
2285                 if (sio_data->type == it8782
2286                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2287                         data->has_temp &= ~(1 << 2);
2288         }
2289 
2290         /* Initialize the IT87 chip */
2291         it87_init_device(pdev);
2292 
2293         /* Register sysfs hooks */
2294         err = sysfs_create_group(&dev->kobj, &it87_group);
2295         if (err)
2296                 return err;
2297 
2298         for (i = 0; i < 10; i++) {
2299                 if (sio_data->skip_in & (1 << i))
2300                         continue;
2301                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2302                 if (err)
2303                         goto error;
2304                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2305                         err = sysfs_create_file(&dev->kobj,
2306                                                 it87_attributes_in_beep[i]);
2307                         if (err)
2308                                 goto error;
2309                 }
2310         }
2311 
2312         for (i = 0; i < 3; i++) {
2313                 if (!(data->has_temp & (1 << i)))
2314                         continue;
2315                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2316                 if (err)
2317                         goto error;
2318                 if (has_temp_offset(data)) {
2319                         err = sysfs_create_file(&dev->kobj,
2320                                                 it87_attributes_temp_offset[i]);
2321                         if (err)
2322                                 goto error;
2323                 }
2324                 if (sio_data->beep_pin) {
2325                         err = sysfs_create_file(&dev->kobj,
2326                                                 it87_attributes_temp_beep[i]);
2327                         if (err)
2328                                 goto error;
2329                 }
2330         }
2331 
2332         /* Do not create fan files for disabled fans */
2333         fan_beep_need_rw = 1;
2334         for (i = 0; i < 6; i++) {
2335                 if (!(data->has_fan & (1 << i)))
2336                         continue;
2337                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2338                 if (err)
2339                         goto error;
2340 
2341                 if (i < 3 && !has_16bit_fans(data)) {
2342                         err = sysfs_create_file(&dev->kobj,
2343                                                 it87_attributes_fan_div[i]);
2344                         if (err)
2345                                 goto error;
2346                 }
2347 
2348                 if (sio_data->beep_pin) {
2349                         err = sysfs_create_file(&dev->kobj,
2350                                                 it87_attributes_fan_beep[i]);
2351                         if (err)
2352                                 goto error;
2353                         if (!fan_beep_need_rw)
2354                                 continue;
2355 
2356                         /*
2357                          * As we have a single beep enable bit for all fans,
2358                          * only the first enabled fan has a writable attribute
2359                          * for it.
2360                          */
2361                         if (sysfs_chmod_file(&dev->kobj,
2362                                              it87_attributes_fan_beep[i],
2363                                              S_IRUGO | S_IWUSR))
2364                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2365                                         i + 1);
2366                         fan_beep_need_rw = 0;
2367                 }
2368         }
2369 
2370         if (enable_pwm_interface) {
2371                 for (i = 0; i < 3; i++) {
2372                         if (sio_data->skip_pwm & (1 << i))
2373                                 continue;
2374                         err = sysfs_create_group(&dev->kobj,
2375                                                  &it87_group_pwm[i]);
2376                         if (err)
2377                                 goto error;
2378 
2379                         if (!has_old_autopwm(data))
2380                                 continue;
2381                         err = sysfs_create_group(&dev->kobj,
2382                                                  &it87_group_autopwm[i]);
2383                         if (err)
2384                                 goto error;
2385                 }
2386         }
2387 
2388         if (!sio_data->skip_vid) {
2389                 data->vrm = vid_which_vrm();
2390                 /* VID reading from Super-I/O config space if available */
2391                 data->vid = sio_data->vid_value;
2392                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2393                 if (err)
2394                         goto error;
2395         }
2396 
2397         /* Export labels for internal sensors */
2398         for (i = 0; i < 4; i++) {
2399                 if (!(sio_data->internal & (1 << i)))
2400                         continue;
2401                 err = sysfs_create_file(&dev->kobj,
2402                                         it87_attributes_label[i]);
2403                 if (err)
2404                         goto error;
2405         }
2406 
2407         data->hwmon_dev = hwmon_device_register(dev);
2408         if (IS_ERR(data->hwmon_dev)) {
2409                 err = PTR_ERR(data->hwmon_dev);
2410                 goto error;
2411         }
2412 
2413         return 0;
2414 
2415 error:
2416         it87_remove_files(dev);
2417         return err;
2418 }
2419 
2420 static int it87_remove(struct platform_device *pdev)
2421 {
2422         struct it87_data *data = platform_get_drvdata(pdev);
2423 
2424         hwmon_device_unregister(data->hwmon_dev);
2425         it87_remove_files(&pdev->dev);
2426 
2427         return 0;
2428 }
2429 
2430 /*
2431  * Must be called with data->update_lock held, except during initialization.
2432  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2433  * would slow down the IT87 access and should not be necessary.
2434  */
2435 static int it87_read_value(struct it87_data *data, u8 reg)
2436 {
2437         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2438         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2439 }
2440 
2441 /*
2442  * Must be called with data->update_lock held, except during initialization.
2443  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2444  * would slow down the IT87 access and should not be necessary.
2445  */
2446 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2447 {
2448         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2449         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2450 }
2451 
2452 /* Return 1 if and only if the PWM interface is safe to use */
2453 static int it87_check_pwm(struct device *dev)
2454 {
2455         struct it87_data *data = dev_get_drvdata(dev);
2456         /*
2457          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2458          * and polarity set to active low is sign that this is the case so we
2459          * disable pwm control to protect the user.
2460          */
2461         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2462         if ((tmp & 0x87) == 0) {
2463                 if (fix_pwm_polarity) {
2464                         /*
2465                          * The user asks us to attempt a chip reconfiguration.
2466                          * This means switching to active high polarity and
2467                          * inverting all fan speed values.
2468                          */
2469                         int i;
2470                         u8 pwm[3];
2471 
2472                         for (i = 0; i < 3; i++)
2473                                 pwm[i] = it87_read_value(data,
2474                                                          IT87_REG_PWM(i));
2475 
2476                         /*
2477                          * If any fan is in automatic pwm mode, the polarity
2478                          * might be correct, as suspicious as it seems, so we
2479                          * better don't change anything (but still disable the
2480                          * PWM interface).
2481                          */
2482                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2483                                 dev_info(dev,
2484                                          "Reconfiguring PWM to active high polarity\n");
2485                                 it87_write_value(data, IT87_REG_FAN_CTL,
2486                                                  tmp | 0x87);
2487                                 for (i = 0; i < 3; i++)
2488                                         it87_write_value(data,
2489                                                          IT87_REG_PWM(i),
2490                                                          0x7f & ~pwm[i]);
2491                                 return 1;
2492                         }
2493 
2494                         dev_info(dev,
2495                                  "PWM configuration is too broken to be fixed\n");
2496                 }
2497 
2498                 dev_info(dev,
2499                          "Detected broken BIOS defaults, disabling PWM interface\n");
2500                 return 0;
2501         } else if (fix_pwm_polarity) {
2502                 dev_info(dev,
2503                          "PWM configuration looks sane, won't touch\n");
2504         }
2505 
2506         return 1;
2507 }
2508 
2509 /* Called when we have found a new IT87. */
2510 static void it87_init_device(struct platform_device *pdev)
2511 {
2512         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2513         struct it87_data *data = platform_get_drvdata(pdev);
2514         int tmp, i;
2515         u8 mask;
2516 
2517         /*
2518          * For each PWM channel:
2519          * - If it is in automatic mode, setting to manual mode should set
2520          *   the fan to full speed by default.
2521          * - If it is in manual mode, we need a mapping to temperature
2522          *   channels to use when later setting to automatic mode later.
2523          *   Use a 1:1 mapping by default (we are clueless.)
2524          * In both cases, the value can (and should) be changed by the user
2525          * prior to switching to a different mode.
2526          * Note that this is no longer needed for the IT8721F and later, as
2527          * these have separate registers for the temperature mapping and the
2528          * manual duty cycle.
2529          */
2530         for (i = 0; i < 3; i++) {
2531                 data->pwm_temp_map[i] = i;
2532                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2533                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2534         }
2535 
2536         /*
2537          * Some chips seem to have default value 0xff for all limit
2538          * registers. For low voltage limits it makes no sense and triggers
2539          * alarms, so change to 0 instead. For high temperature limits, it
2540          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2541          * but is still confusing, so change to 127 degrees C.
2542          */
2543         for (i = 0; i < 8; i++) {
2544                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2545                 if (tmp == 0xff)
2546                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2547         }
2548         for (i = 0; i < 3; i++) {
2549                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2550                 if (tmp == 0xff)
2551                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2552         }
2553 
2554         /*
2555          * Temperature channels are not forcibly enabled, as they can be
2556          * set to two different sensor types and we can't guess which one
2557          * is correct for a given system. These channels can be enabled at
2558          * run-time through the temp{1-3}_type sysfs accessors if needed.
2559          */
2560 
2561         /* Check if voltage monitors are reset manually or by some reason */
2562         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2563         if ((tmp & 0xff) == 0) {
2564                 /* Enable all voltage monitors */
2565                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2566         }
2567 
2568         /* Check if tachometers are reset manually or by some reason */
2569         mask = 0x70 & ~(sio_data->skip_fan << 4);
2570         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2571         if ((data->fan_main_ctrl & mask) == 0) {
2572                 /* Enable all fan tachometers */
2573                 data->fan_main_ctrl |= mask;
2574                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2575                                  data->fan_main_ctrl);
2576         }
2577         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2578 
2579         tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2580 
2581         /* Set tachometers to 16-bit mode if needed */
2582         if (has_fan16_config(data)) {
2583                 if (~tmp & 0x07 & data->has_fan) {
2584                         dev_dbg(&pdev->dev,
2585                                 "Setting fan1-3 to 16-bit mode\n");
2586                         it87_write_value(data, IT87_REG_FAN_16BIT,
2587                                          tmp | 0x07);
2588                 }
2589         }
2590 
2591         /* Check for additional fans */
2592         if (has_five_fans(data)) {
2593                 if (tmp & (1 << 4))
2594                         data->has_fan |= (1 << 3); /* fan4 enabled */
2595                 if (tmp & (1 << 5))
2596                         data->has_fan |= (1 << 4); /* fan5 enabled */
2597                 if (has_six_fans(data) && (tmp & (1 << 2)))
2598                         data->has_fan |= (1 << 5); /* fan6 enabled */
2599         }
2600 
2601         /* Fan input pins may be used for alternative functions */
2602         data->has_fan &= ~sio_data->skip_fan;
2603 
2604         /* Start monitoring */
2605         it87_write_value(data, IT87_REG_CONFIG,
2606                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2607                          | (update_vbat ? 0x41 : 0x01));
2608 }
2609 
2610 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2611 {
2612         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2613         if (has_newer_autopwm(data)) {
2614                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2615                 data->pwm_duty[nr] = it87_read_value(data,
2616                                                      IT87_REG_PWM_DUTY(nr));
2617         } else {
2618                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2619                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2620                 else                            /* Manual mode */
2621                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2622         }
2623 
2624         if (has_old_autopwm(data)) {
2625                 int i;
2626 
2627                 for (i = 0; i < 5 ; i++)
2628                         data->auto_temp[nr][i] = it87_read_value(data,
2629                                                 IT87_REG_AUTO_TEMP(nr, i));
2630                 for (i = 0; i < 3 ; i++)
2631                         data->auto_pwm[nr][i] = it87_read_value(data,
2632                                                 IT87_REG_AUTO_PWM(nr, i));
2633         }
2634 }
2635 
2636 static struct it87_data *it87_update_device(struct device *dev)
2637 {
2638         struct it87_data *data = dev_get_drvdata(dev);
2639         int i;
2640 
2641         mutex_lock(&data->update_lock);
2642 
2643         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2644             || !data->valid) {
2645                 if (update_vbat) {
2646                         /*
2647                          * Cleared after each update, so reenable.  Value
2648                          * returned by this read will be previous value
2649                          */
2650                         it87_write_value(data, IT87_REG_CONFIG,
2651                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2652                 }
2653                 for (i = 0; i <= 7; i++) {
2654                         data->in[i][0] =
2655                                 it87_read_value(data, IT87_REG_VIN(i));
2656                         data->in[i][1] =
2657                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2658                         data->in[i][2] =
2659                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2660                 }
2661                 /* in8 (battery) has no limit registers */
2662                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2663                 if (data->type == it8603)
2664                         data->in[9][0] = it87_read_value(data, 0x2f);
2665 
2666                 for (i = 0; i < 6; i++) {
2667                         /* Skip disabled fans */
2668                         if (!(data->has_fan & (1 << i)))
2669                                 continue;
2670 
2671                         data->fan[i][1] =
2672                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2673                         data->fan[i][0] = it87_read_value(data,
2674                                        IT87_REG_FAN[i]);
2675                         /* Add high byte if in 16-bit mode */
2676                         if (has_16bit_fans(data)) {
2677                                 data->fan[i][0] |= it87_read_value(data,
2678                                                 IT87_REG_FANX[i]) << 8;
2679                                 data->fan[i][1] |= it87_read_value(data,
2680                                                 IT87_REG_FANX_MIN[i]) << 8;
2681                         }
2682                 }
2683                 for (i = 0; i < 3; i++) {
2684                         if (!(data->has_temp & (1 << i)))
2685                                 continue;
2686                         data->temp[i][0] =
2687                                 it87_read_value(data, IT87_REG_TEMP(i));
2688                         data->temp[i][1] =
2689                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2690                         data->temp[i][2] =
2691                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2692                         if (has_temp_offset(data))
2693                                 data->temp[i][3] =
2694                                   it87_read_value(data,
2695                                                   IT87_REG_TEMP_OFFSET[i]);
2696                 }
2697 
2698                 /* Newer chips don't have clock dividers */
2699                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2700                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2701                         data->fan_div[0] = i & 0x07;
2702                         data->fan_div[1] = (i >> 3) & 0x07;
2703                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2704                 }
2705 
2706                 data->alarms =
2707                         it87_read_value(data, IT87_REG_ALARM1) |
2708                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2709                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2710                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2711 
2712                 data->fan_main_ctrl = it87_read_value(data,
2713                                 IT87_REG_FAN_MAIN_CTRL);
2714                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2715                 for (i = 0; i < 3; i++)
2716                         it87_update_pwm_ctrl(data, i);
2717 
2718                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2719                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2720                 /*
2721                  * The IT8705F does not have VID capability.
2722                  * The IT8718F and later don't use IT87_REG_VID for the
2723                  * same purpose.
2724                  */
2725                 if (data->type == it8712 || data->type == it8716) {
2726                         data->vid = it87_read_value(data, IT87_REG_VID);
2727                         /*
2728                          * The older IT8712F revisions had only 5 VID pins,
2729                          * but we assume it is always safe to read 6 bits.
2730                          */
2731                         data->vid &= 0x3f;
2732                 }
2733                 data->last_updated = jiffies;
2734                 data->valid = 1;
2735         }
2736 
2737         mutex_unlock(&data->update_lock);
2738 
2739         return data;
2740 }
2741 
2742 static int __init it87_device_add(unsigned short address,
2743                                   const struct it87_sio_data *sio_data)
2744 {
2745         struct resource res = {
2746                 .start  = address + IT87_EC_OFFSET,
2747                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2748                 .name   = DRVNAME,
2749                 .flags  = IORESOURCE_IO,
2750         };
2751         int err;
2752 
2753         err = acpi_check_resource_conflict(&res);
2754         if (err)
2755                 goto exit;
2756 
2757         pdev = platform_device_alloc(DRVNAME, address);
2758         if (!pdev) {
2759                 err = -ENOMEM;
2760                 pr_err("Device allocation failed\n");
2761                 goto exit;
2762         }
2763 
2764         err = platform_device_add_resources(pdev, &res, 1);
2765         if (err) {
2766                 pr_err("Device resource addition failed (%d)\n", err);
2767                 goto exit_device_put;
2768         }
2769 
2770         err = platform_device_add_data(pdev, sio_data,
2771                                        sizeof(struct it87_sio_data));
2772         if (err) {
2773                 pr_err("Platform data allocation failed\n");
2774                 goto exit_device_put;
2775         }
2776 
2777         err = platform_device_add(pdev);
2778         if (err) {
2779                 pr_err("Device addition failed (%d)\n", err);
2780                 goto exit_device_put;
2781         }
2782 
2783         return 0;
2784 
2785 exit_device_put:
2786         platform_device_put(pdev);
2787 exit:
2788         return err;
2789 }
2790 
2791 static int __init sm_it87_init(void)
2792 {
2793         int err;
2794         unsigned short isa_address = 0;
2795         struct it87_sio_data sio_data;
2796 
2797         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2798         err = it87_find(&isa_address, &sio_data);
2799         if (err)
2800                 return err;
2801         err = platform_driver_register(&it87_driver);
2802         if (err)
2803                 return err;
2804 
2805         err = it87_device_add(isa_address, &sio_data);
2806         if (err) {
2807                 platform_driver_unregister(&it87_driver);
2808                 return err;
2809         }
2810 
2811         return 0;
2812 }
2813 
2814 static void __exit sm_it87_exit(void)
2815 {
2816         platform_device_unregister(pdev);
2817         platform_driver_unregister(&it87_driver);
2818 }
2819 
2820 
2821 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2822 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2823 module_param(update_vbat, bool, 0);
2824 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2825 module_param(fix_pwm_polarity, bool, 0);
2826 MODULE_PARM_DESC(fix_pwm_polarity,
2827                  "Force PWM polarity to active high (DANGEROUS)");
2828 MODULE_LICENSE("GPL");
2829 
2830 module_init(sm_it87_init);
2831 module_exit(sm_it87_exit);
2832 

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