Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

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

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