Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 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

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                 .owner  = THIS_MODULE,
502                 .name   = DRVNAME,
503         },
504         .probe  = it87_probe,
505         .remove = it87_remove,
506 };
507 
508 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
509                        char *buf)
510 {
511         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
512         int nr = sattr->nr;
513         int index = sattr->index;
514 
515         struct it87_data *data = it87_update_device(dev);
516         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
517 }
518 
519 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
520                       const char *buf, size_t count)
521 {
522         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
523         int nr = sattr->nr;
524         int index = sattr->index;
525 
526         struct it87_data *data = dev_get_drvdata(dev);
527         unsigned long val;
528 
529         if (kstrtoul(buf, 10, &val) < 0)
530                 return -EINVAL;
531 
532         mutex_lock(&data->update_lock);
533         data->in[nr][index] = in_to_reg(data, nr, val);
534         it87_write_value(data,
535                          index == 1 ? IT87_REG_VIN_MIN(nr)
536                                     : IT87_REG_VIN_MAX(nr),
537                          data->in[nr][index]);
538         mutex_unlock(&data->update_lock);
539         return count;
540 }
541 
542 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
543 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
544                             0, 1);
545 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
546                             0, 2);
547 
548 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
549 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
550                             1, 1);
551 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
552                             1, 2);
553 
554 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
555 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
556                             2, 1);
557 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
558                             2, 2);
559 
560 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
561 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
562                             3, 1);
563 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
564                             3, 2);
565 
566 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
567 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
568                             4, 1);
569 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
570                             4, 2);
571 
572 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
573 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
574                             5, 1);
575 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
576                             5, 2);
577 
578 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
579 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
580                             6, 1);
581 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
582                             6, 2);
583 
584 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
585 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
586                             7, 1);
587 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
588                             7, 2);
589 
590 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
591 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
592 
593 /* 3 temperatures */
594 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
595                          char *buf)
596 {
597         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
598         int nr = sattr->nr;
599         int index = sattr->index;
600         struct it87_data *data = it87_update_device(dev);
601 
602         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
603 }
604 
605 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
606                         const char *buf, size_t count)
607 {
608         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
609         int nr = sattr->nr;
610         int index = sattr->index;
611         struct it87_data *data = dev_get_drvdata(dev);
612         long val;
613         u8 reg, regval;
614 
615         if (kstrtol(buf, 10, &val) < 0)
616                 return -EINVAL;
617 
618         mutex_lock(&data->update_lock);
619 
620         switch (index) {
621         default:
622         case 1:
623                 reg = IT87_REG_TEMP_LOW(nr);
624                 break;
625         case 2:
626                 reg = IT87_REG_TEMP_HIGH(nr);
627                 break;
628         case 3:
629                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
630                 if (!(regval & 0x80)) {
631                         regval |= 0x80;
632                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
633                 }
634                 data->valid = 0;
635                 reg = IT87_REG_TEMP_OFFSET[nr];
636                 break;
637         }
638 
639         data->temp[nr][index] = TEMP_TO_REG(val);
640         it87_write_value(data, reg, data->temp[nr][index]);
641         mutex_unlock(&data->update_lock);
642         return count;
643 }
644 
645 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
646 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
647                             0, 1);
648 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
649                             0, 2);
650 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
651                             set_temp, 0, 3);
652 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
653 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
654                             1, 1);
655 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
656                             1, 2);
657 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
658                             set_temp, 1, 3);
659 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
660 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
661                             2, 1);
662 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
663                             2, 2);
664 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
665                             set_temp, 2, 3);
666 
667 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
668                               char *buf)
669 {
670         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
671         int nr = sensor_attr->index;
672         struct it87_data *data = it87_update_device(dev);
673         u8 reg = data->sensor;      /* In case value is updated while used */
674         u8 extra = data->extra;
675 
676         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
677             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
678                 return sprintf(buf, "6\n");  /* Intel PECI */
679         if (reg & (1 << nr))
680                 return sprintf(buf, "3\n");  /* thermal diode */
681         if (reg & (8 << nr))
682                 return sprintf(buf, "4\n");  /* thermistor */
683         return sprintf(buf, "\n");      /* disabled */
684 }
685 
686 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
687                              const char *buf, size_t count)
688 {
689         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
690         int nr = sensor_attr->index;
691 
692         struct it87_data *data = dev_get_drvdata(dev);
693         long val;
694         u8 reg, extra;
695 
696         if (kstrtol(buf, 10, &val) < 0)
697                 return -EINVAL;
698 
699         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
700         reg &= ~(1 << nr);
701         reg &= ~(8 << nr);
702         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
703                 reg &= 0x3f;
704         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
705         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
706                 extra &= 0x7f;
707         if (val == 2) { /* backwards compatibility */
708                 dev_warn(dev,
709                          "Sensor type 2 is deprecated, please use 4 instead\n");
710                 val = 4;
711         }
712         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
713         if (val == 3)
714                 reg |= 1 << nr;
715         else if (val == 4)
716                 reg |= 8 << nr;
717         else if (has_temp_peci(data, nr) && val == 6)
718                 reg |= (nr + 1) << 6;
719         else if (has_temp_old_peci(data, nr) && val == 6)
720                 extra |= 0x80;
721         else if (val != 0)
722                 return -EINVAL;
723 
724         mutex_lock(&data->update_lock);
725         data->sensor = reg;
726         data->extra = extra;
727         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
728         if (has_temp_old_peci(data, nr))
729                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
730         data->valid = 0;        /* Force cache refresh */
731         mutex_unlock(&data->update_lock);
732         return count;
733 }
734 
735 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
736                           set_temp_type, 0);
737 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
738                           set_temp_type, 1);
739 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
740                           set_temp_type, 2);
741 
742 /* 3 Fans */
743 
744 static int pwm_mode(const struct it87_data *data, int nr)
745 {
746         int ctrl = data->fan_main_ctrl & (1 << nr);
747 
748         if (ctrl == 0 && data->type != it8603)          /* Full speed */
749                 return 0;
750         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
751                 return 2;
752         else                                            /* Manual mode */
753                 return 1;
754 }
755 
756 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
757                         char *buf)
758 {
759         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
760         int nr = sattr->nr;
761         int index = sattr->index;
762         int speed;
763         struct it87_data *data = it87_update_device(dev);
764 
765         speed = has_16bit_fans(data) ?
766                 FAN16_FROM_REG(data->fan[nr][index]) :
767                 FAN_FROM_REG(data->fan[nr][index],
768                              DIV_FROM_REG(data->fan_div[nr]));
769         return sprintf(buf, "%d\n", speed);
770 }
771 
772 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
773                 char *buf)
774 {
775         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
776         int nr = sensor_attr->index;
777 
778         struct it87_data *data = it87_update_device(dev);
779         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
780 }
781 static ssize_t show_pwm_enable(struct device *dev,
782                 struct device_attribute *attr, char *buf)
783 {
784         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
785         int nr = sensor_attr->index;
786 
787         struct it87_data *data = it87_update_device(dev);
788         return sprintf(buf, "%d\n", pwm_mode(data, nr));
789 }
790 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
791                 char *buf)
792 {
793         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
794         int nr = sensor_attr->index;
795 
796         struct it87_data *data = it87_update_device(dev);
797         return sprintf(buf, "%d\n",
798                        pwm_from_reg(data, data->pwm_duty[nr]));
799 }
800 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
801                 char *buf)
802 {
803         struct it87_data *data = it87_update_device(dev);
804         int index = (data->fan_ctl >> 4) & 0x07;
805 
806         return sprintf(buf, "%u\n", pwm_freq[index]);
807 }
808 
809 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
810                        const char *buf, size_t count)
811 {
812         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
813         int nr = sattr->nr;
814         int index = sattr->index;
815 
816         struct it87_data *data = dev_get_drvdata(dev);
817         long val;
818         u8 reg;
819 
820         if (kstrtol(buf, 10, &val) < 0)
821                 return -EINVAL;
822 
823         mutex_lock(&data->update_lock);
824 
825         if (has_16bit_fans(data)) {
826                 data->fan[nr][index] = FAN16_TO_REG(val);
827                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
828                                  data->fan[nr][index] & 0xff);
829                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
830                                  data->fan[nr][index] >> 8);
831         } else {
832                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
833                 switch (nr) {
834                 case 0:
835                         data->fan_div[nr] = reg & 0x07;
836                         break;
837                 case 1:
838                         data->fan_div[nr] = (reg >> 3) & 0x07;
839                         break;
840                 case 2:
841                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
842                         break;
843                 }
844                 data->fan[nr][index] =
845                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
846                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
847                                  data->fan[nr][index]);
848         }
849 
850         mutex_unlock(&data->update_lock);
851         return count;
852 }
853 
854 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
855                 const char *buf, size_t count)
856 {
857         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
858         int nr = sensor_attr->index;
859 
860         struct it87_data *data = dev_get_drvdata(dev);
861         unsigned long val;
862         int min;
863         u8 old;
864 
865         if (kstrtoul(buf, 10, &val) < 0)
866                 return -EINVAL;
867 
868         mutex_lock(&data->update_lock);
869         old = it87_read_value(data, IT87_REG_FAN_DIV);
870 
871         /* Save fan min limit */
872         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
873 
874         switch (nr) {
875         case 0:
876         case 1:
877                 data->fan_div[nr] = DIV_TO_REG(val);
878                 break;
879         case 2:
880                 if (val < 8)
881                         data->fan_div[nr] = 1;
882                 else
883                         data->fan_div[nr] = 3;
884         }
885         val = old & 0x80;
886         val |= (data->fan_div[0] & 0x07);
887         val |= (data->fan_div[1] & 0x07) << 3;
888         if (data->fan_div[2] == 3)
889                 val |= 0x1 << 6;
890         it87_write_value(data, IT87_REG_FAN_DIV, val);
891 
892         /* Restore fan min limit */
893         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
894         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
895 
896         mutex_unlock(&data->update_lock);
897         return count;
898 }
899 
900 /* Returns 0 if OK, -EINVAL otherwise */
901 static int check_trip_points(struct device *dev, int nr)
902 {
903         const struct it87_data *data = dev_get_drvdata(dev);
904         int i, err = 0;
905 
906         if (has_old_autopwm(data)) {
907                 for (i = 0; i < 3; i++) {
908                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
909                                 err = -EINVAL;
910                 }
911                 for (i = 0; i < 2; i++) {
912                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
913                                 err = -EINVAL;
914                 }
915         }
916 
917         if (err) {
918                 dev_err(dev,
919                         "Inconsistent trip points, not switching to automatic mode\n");
920                 dev_err(dev, "Adjust the trip points and try again\n");
921         }
922         return err;
923 }
924 
925 static ssize_t set_pwm_enable(struct device *dev,
926                 struct device_attribute *attr, const char *buf, size_t count)
927 {
928         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
929         int nr = sensor_attr->index;
930 
931         struct it87_data *data = dev_get_drvdata(dev);
932         long val;
933 
934         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
935                 return -EINVAL;
936 
937         /* Check trip points before switching to automatic mode */
938         if (val == 2) {
939                 if (check_trip_points(dev, nr) < 0)
940                         return -EINVAL;
941         }
942 
943         /* IT8603E does not have on/off mode */
944         if (val == 0 && data->type == it8603)
945                 return -EINVAL;
946 
947         mutex_lock(&data->update_lock);
948 
949         if (val == 0) {
950                 int tmp;
951                 /* make sure the fan is on when in on/off mode */
952                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
953                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
954                 /* set on/off mode */
955                 data->fan_main_ctrl &= ~(1 << nr);
956                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
957                                  data->fan_main_ctrl);
958         } else {
959                 if (val == 1)                           /* Manual mode */
960                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
961                                              data->pwm_temp_map[nr] :
962                                              data->pwm_duty[nr];
963                 else                                    /* Automatic mode */
964                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
965                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
966 
967                 if (data->type != it8603) {
968                         /* set SmartGuardian mode */
969                         data->fan_main_ctrl |= (1 << nr);
970                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
971                                          data->fan_main_ctrl);
972                 }
973         }
974 
975         mutex_unlock(&data->update_lock);
976         return count;
977 }
978 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
979                 const char *buf, size_t count)
980 {
981         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
982         int nr = sensor_attr->index;
983 
984         struct it87_data *data = dev_get_drvdata(dev);
985         long val;
986 
987         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
988                 return -EINVAL;
989 
990         mutex_lock(&data->update_lock);
991         if (has_newer_autopwm(data)) {
992                 /*
993                  * If we are in automatic mode, the PWM duty cycle register
994                  * is read-only so we can't write the value.
995                  */
996                 if (data->pwm_ctrl[nr] & 0x80) {
997                         mutex_unlock(&data->update_lock);
998                         return -EBUSY;
999                 }
1000                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1001                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1002                                  data->pwm_duty[nr]);
1003         } else {
1004                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1005                 /*
1006                  * If we are in manual mode, write the duty cycle immediately;
1007                  * otherwise, just store it for later use.
1008                  */
1009                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1010                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1011                         it87_write_value(data, IT87_REG_PWM(nr),
1012                                          data->pwm_ctrl[nr]);
1013                 }
1014         }
1015         mutex_unlock(&data->update_lock);
1016         return count;
1017 }
1018 static ssize_t set_pwm_freq(struct device *dev,
1019                 struct device_attribute *attr, const char *buf, size_t count)
1020 {
1021         struct it87_data *data = dev_get_drvdata(dev);
1022         unsigned long val;
1023         int i;
1024 
1025         if (kstrtoul(buf, 10, &val) < 0)
1026                 return -EINVAL;
1027 
1028         /* Search for the nearest available frequency */
1029         for (i = 0; i < 7; i++) {
1030                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1031                         break;
1032         }
1033 
1034         mutex_lock(&data->update_lock);
1035         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1036         data->fan_ctl |= i << 4;
1037         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1038         mutex_unlock(&data->update_lock);
1039 
1040         return count;
1041 }
1042 static ssize_t show_pwm_temp_map(struct device *dev,
1043                 struct device_attribute *attr, char *buf)
1044 {
1045         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1046         int nr = sensor_attr->index;
1047 
1048         struct it87_data *data = it87_update_device(dev);
1049         int map;
1050 
1051         if (data->pwm_temp_map[nr] < 3)
1052                 map = 1 << data->pwm_temp_map[nr];
1053         else
1054                 map = 0;                        /* Should never happen */
1055         return sprintf(buf, "%d\n", map);
1056 }
1057 static ssize_t set_pwm_temp_map(struct device *dev,
1058                 struct device_attribute *attr, const char *buf, size_t count)
1059 {
1060         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1061         int nr = sensor_attr->index;
1062 
1063         struct it87_data *data = dev_get_drvdata(dev);
1064         long val;
1065         u8 reg;
1066 
1067         /*
1068          * This check can go away if we ever support automatic fan speed
1069          * control on newer chips.
1070          */
1071         if (!has_old_autopwm(data)) {
1072                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1073                 return -EINVAL;
1074         }
1075 
1076         if (kstrtol(buf, 10, &val) < 0)
1077                 return -EINVAL;
1078 
1079         switch (val) {
1080         case (1 << 0):
1081                 reg = 0x00;
1082                 break;
1083         case (1 << 1):
1084                 reg = 0x01;
1085                 break;
1086         case (1 << 2):
1087                 reg = 0x02;
1088                 break;
1089         default:
1090                 return -EINVAL;
1091         }
1092 
1093         mutex_lock(&data->update_lock);
1094         data->pwm_temp_map[nr] = reg;
1095         /*
1096          * If we are in automatic mode, write the temp mapping immediately;
1097          * otherwise, just store it for later use.
1098          */
1099         if (data->pwm_ctrl[nr] & 0x80) {
1100                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1101                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1102         }
1103         mutex_unlock(&data->update_lock);
1104         return count;
1105 }
1106 
1107 static ssize_t show_auto_pwm(struct device *dev,
1108                 struct device_attribute *attr, char *buf)
1109 {
1110         struct it87_data *data = it87_update_device(dev);
1111         struct sensor_device_attribute_2 *sensor_attr =
1112                         to_sensor_dev_attr_2(attr);
1113         int nr = sensor_attr->nr;
1114         int point = sensor_attr->index;
1115 
1116         return sprintf(buf, "%d\n",
1117                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1118 }
1119 
1120 static ssize_t set_auto_pwm(struct device *dev,
1121                 struct device_attribute *attr, const char *buf, size_t count)
1122 {
1123         struct it87_data *data = dev_get_drvdata(dev);
1124         struct sensor_device_attribute_2 *sensor_attr =
1125                         to_sensor_dev_attr_2(attr);
1126         int nr = sensor_attr->nr;
1127         int point = sensor_attr->index;
1128         long val;
1129 
1130         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1131                 return -EINVAL;
1132 
1133         mutex_lock(&data->update_lock);
1134         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1135         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1136                          data->auto_pwm[nr][point]);
1137         mutex_unlock(&data->update_lock);
1138         return count;
1139 }
1140 
1141 static ssize_t show_auto_temp(struct device *dev,
1142                 struct device_attribute *attr, char *buf)
1143 {
1144         struct it87_data *data = it87_update_device(dev);
1145         struct sensor_device_attribute_2 *sensor_attr =
1146                         to_sensor_dev_attr_2(attr);
1147         int nr = sensor_attr->nr;
1148         int point = sensor_attr->index;
1149 
1150         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1151 }
1152 
1153 static ssize_t set_auto_temp(struct device *dev,
1154                 struct device_attribute *attr, const char *buf, size_t count)
1155 {
1156         struct it87_data *data = dev_get_drvdata(dev);
1157         struct sensor_device_attribute_2 *sensor_attr =
1158                         to_sensor_dev_attr_2(attr);
1159         int nr = sensor_attr->nr;
1160         int point = sensor_attr->index;
1161         long val;
1162 
1163         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1164                 return -EINVAL;
1165 
1166         mutex_lock(&data->update_lock);
1167         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1168         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1169                          data->auto_temp[nr][point]);
1170         mutex_unlock(&data->update_lock);
1171         return count;
1172 }
1173 
1174 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1175 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1176                             0, 1);
1177 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1178                           set_fan_div, 0);
1179 
1180 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1181 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1182                             1, 1);
1183 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1184                           set_fan_div, 1);
1185 
1186 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1187 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1188                             2, 1);
1189 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1190                           set_fan_div, 2);
1191 
1192 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1193 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1194                             3, 1);
1195 
1196 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1197 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1198                             4, 1);
1199 
1200 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1201                           show_pwm_enable, set_pwm_enable, 0);
1202 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1203 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1204 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1205                           show_pwm_temp_map, set_pwm_temp_map, 0);
1206 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1207                             show_auto_pwm, set_auto_pwm, 0, 0);
1208 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1209                             show_auto_pwm, set_auto_pwm, 0, 1);
1210 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1211                             show_auto_pwm, set_auto_pwm, 0, 2);
1212 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1213                             show_auto_pwm, NULL, 0, 3);
1214 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1215                             show_auto_temp, set_auto_temp, 0, 1);
1216 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1217                             show_auto_temp, set_auto_temp, 0, 0);
1218 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1219                             show_auto_temp, set_auto_temp, 0, 2);
1220 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1221                             show_auto_temp, set_auto_temp, 0, 3);
1222 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1223                             show_auto_temp, set_auto_temp, 0, 4);
1224 
1225 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1226                           show_pwm_enable, set_pwm_enable, 1);
1227 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1228 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1229 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1230                           show_pwm_temp_map, set_pwm_temp_map, 1);
1231 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1232                             show_auto_pwm, set_auto_pwm, 1, 0);
1233 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1234                             show_auto_pwm, set_auto_pwm, 1, 1);
1235 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1236                             show_auto_pwm, set_auto_pwm, 1, 2);
1237 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1238                             show_auto_pwm, NULL, 1, 3);
1239 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1240                             show_auto_temp, set_auto_temp, 1, 1);
1241 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1242                             show_auto_temp, set_auto_temp, 1, 0);
1243 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1244                             show_auto_temp, set_auto_temp, 1, 2);
1245 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1246                             show_auto_temp, set_auto_temp, 1, 3);
1247 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1248                             show_auto_temp, set_auto_temp, 1, 4);
1249 
1250 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1251                           show_pwm_enable, set_pwm_enable, 2);
1252 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1253 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1254 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1255                           show_pwm_temp_map, set_pwm_temp_map, 2);
1256 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1257                             show_auto_pwm, set_auto_pwm, 2, 0);
1258 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1259                             show_auto_pwm, set_auto_pwm, 2, 1);
1260 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1261                             show_auto_pwm, set_auto_pwm, 2, 2);
1262 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1263                             show_auto_pwm, NULL, 2, 3);
1264 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1265                             show_auto_temp, set_auto_temp, 2, 1);
1266 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1267                             show_auto_temp, set_auto_temp, 2, 0);
1268 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1269                             show_auto_temp, set_auto_temp, 2, 2);
1270 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1271                             show_auto_temp, set_auto_temp, 2, 3);
1272 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1273                             show_auto_temp, set_auto_temp, 2, 4);
1274 
1275 /* Alarms */
1276 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1277                 char *buf)
1278 {
1279         struct it87_data *data = it87_update_device(dev);
1280         return sprintf(buf, "%u\n", data->alarms);
1281 }
1282 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1283 
1284 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1285                 char *buf)
1286 {
1287         int bitnr = to_sensor_dev_attr(attr)->index;
1288         struct it87_data *data = it87_update_device(dev);
1289         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1290 }
1291 
1292 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1293                 *attr, const char *buf, size_t count)
1294 {
1295         struct it87_data *data = dev_get_drvdata(dev);
1296         long val;
1297         int config;
1298 
1299         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1300                 return -EINVAL;
1301 
1302         mutex_lock(&data->update_lock);
1303         config = it87_read_value(data, IT87_REG_CONFIG);
1304         if (config < 0) {
1305                 count = config;
1306         } else {
1307                 config |= 1 << 5;
1308                 it87_write_value(data, IT87_REG_CONFIG, config);
1309                 /* Invalidate cache to force re-read */
1310                 data->valid = 0;
1311         }
1312         mutex_unlock(&data->update_lock);
1313 
1314         return count;
1315 }
1316 
1317 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1318 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1319 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1320 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1321 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1322 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1323 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1324 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1325 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1326 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1327 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1328 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1329 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1330 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1331 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1332 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1333 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1334                           show_alarm, clear_intrusion, 4);
1335 
1336 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1337                 char *buf)
1338 {
1339         int bitnr = to_sensor_dev_attr(attr)->index;
1340         struct it87_data *data = it87_update_device(dev);
1341         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1342 }
1343 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1344                 const char *buf, size_t count)
1345 {
1346         int bitnr = to_sensor_dev_attr(attr)->index;
1347         struct it87_data *data = dev_get_drvdata(dev);
1348         long val;
1349 
1350         if (kstrtol(buf, 10, &val) < 0
1351          || (val != 0 && val != 1))
1352                 return -EINVAL;
1353 
1354         mutex_lock(&data->update_lock);
1355         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1356         if (val)
1357                 data->beeps |= (1 << bitnr);
1358         else
1359                 data->beeps &= ~(1 << bitnr);
1360         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1361         mutex_unlock(&data->update_lock);
1362         return count;
1363 }
1364 
1365 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1366                           show_beep, set_beep, 1);
1367 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1368 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1369 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1370 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1371 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1372 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1373 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1374 /* fanX_beep writability is set later */
1375 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1376 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1377 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1378 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1379 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1380 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1381                           show_beep, set_beep, 2);
1382 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1383 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1384 
1385 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1386                 char *buf)
1387 {
1388         struct it87_data *data = dev_get_drvdata(dev);
1389         return sprintf(buf, "%u\n", data->vrm);
1390 }
1391 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1392                 const char *buf, size_t count)
1393 {
1394         struct it87_data *data = dev_get_drvdata(dev);
1395         unsigned long val;
1396 
1397         if (kstrtoul(buf, 10, &val) < 0)
1398                 return -EINVAL;
1399 
1400         data->vrm = val;
1401 
1402         return count;
1403 }
1404 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1405 
1406 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1407                 char *buf)
1408 {
1409         struct it87_data *data = it87_update_device(dev);
1410         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1411 }
1412 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1413 
1414 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1415                 char *buf)
1416 {
1417         static const char * const labels[] = {
1418                 "+5V",
1419                 "5VSB",
1420                 "Vbat",
1421         };
1422         static const char * const labels_it8721[] = {
1423                 "+3.3V",
1424                 "3VSB",
1425                 "Vbat",
1426         };
1427         struct it87_data *data = dev_get_drvdata(dev);
1428         int nr = to_sensor_dev_attr(attr)->index;
1429 
1430         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1431                                                        : labels[nr]);
1432 }
1433 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1434 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1435 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1436 /* special AVCC3 IT8603E in9 */
1437 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1438 
1439 static ssize_t show_name(struct device *dev, struct device_attribute
1440                          *devattr, char *buf)
1441 {
1442         struct it87_data *data = dev_get_drvdata(dev);
1443         return sprintf(buf, "%s\n", data->name);
1444 }
1445 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1446 
1447 static struct attribute *it87_attributes_in[10][5] = {
1448 {
1449         &sensor_dev_attr_in0_input.dev_attr.attr,
1450         &sensor_dev_attr_in0_min.dev_attr.attr,
1451         &sensor_dev_attr_in0_max.dev_attr.attr,
1452         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1453         NULL
1454 }, {
1455         &sensor_dev_attr_in1_input.dev_attr.attr,
1456         &sensor_dev_attr_in1_min.dev_attr.attr,
1457         &sensor_dev_attr_in1_max.dev_attr.attr,
1458         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1459         NULL
1460 }, {
1461         &sensor_dev_attr_in2_input.dev_attr.attr,
1462         &sensor_dev_attr_in2_min.dev_attr.attr,
1463         &sensor_dev_attr_in2_max.dev_attr.attr,
1464         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1465         NULL
1466 }, {
1467         &sensor_dev_attr_in3_input.dev_attr.attr,
1468         &sensor_dev_attr_in3_min.dev_attr.attr,
1469         &sensor_dev_attr_in3_max.dev_attr.attr,
1470         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1471         NULL
1472 }, {
1473         &sensor_dev_attr_in4_input.dev_attr.attr,
1474         &sensor_dev_attr_in4_min.dev_attr.attr,
1475         &sensor_dev_attr_in4_max.dev_attr.attr,
1476         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1477         NULL
1478 }, {
1479         &sensor_dev_attr_in5_input.dev_attr.attr,
1480         &sensor_dev_attr_in5_min.dev_attr.attr,
1481         &sensor_dev_attr_in5_max.dev_attr.attr,
1482         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1483         NULL
1484 }, {
1485         &sensor_dev_attr_in6_input.dev_attr.attr,
1486         &sensor_dev_attr_in6_min.dev_attr.attr,
1487         &sensor_dev_attr_in6_max.dev_attr.attr,
1488         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1489         NULL
1490 }, {
1491         &sensor_dev_attr_in7_input.dev_attr.attr,
1492         &sensor_dev_attr_in7_min.dev_attr.attr,
1493         &sensor_dev_attr_in7_max.dev_attr.attr,
1494         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1495         NULL
1496 }, {
1497         &sensor_dev_attr_in8_input.dev_attr.attr,
1498         NULL
1499 }, {
1500         &sensor_dev_attr_in9_input.dev_attr.attr,
1501         NULL
1502 } };
1503 
1504 static const struct attribute_group it87_group_in[10] = {
1505         { .attrs = it87_attributes_in[0] },
1506         { .attrs = it87_attributes_in[1] },
1507         { .attrs = it87_attributes_in[2] },
1508         { .attrs = it87_attributes_in[3] },
1509         { .attrs = it87_attributes_in[4] },
1510         { .attrs = it87_attributes_in[5] },
1511         { .attrs = it87_attributes_in[6] },
1512         { .attrs = it87_attributes_in[7] },
1513         { .attrs = it87_attributes_in[8] },
1514         { .attrs = it87_attributes_in[9] },
1515 };
1516 
1517 static struct attribute *it87_attributes_temp[3][6] = {
1518 {
1519         &sensor_dev_attr_temp1_input.dev_attr.attr,
1520         &sensor_dev_attr_temp1_max.dev_attr.attr,
1521         &sensor_dev_attr_temp1_min.dev_attr.attr,
1522         &sensor_dev_attr_temp1_type.dev_attr.attr,
1523         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1524         NULL
1525 } , {
1526         &sensor_dev_attr_temp2_input.dev_attr.attr,
1527         &sensor_dev_attr_temp2_max.dev_attr.attr,
1528         &sensor_dev_attr_temp2_min.dev_attr.attr,
1529         &sensor_dev_attr_temp2_type.dev_attr.attr,
1530         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1531         NULL
1532 } , {
1533         &sensor_dev_attr_temp3_input.dev_attr.attr,
1534         &sensor_dev_attr_temp3_max.dev_attr.attr,
1535         &sensor_dev_attr_temp3_min.dev_attr.attr,
1536         &sensor_dev_attr_temp3_type.dev_attr.attr,
1537         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1538         NULL
1539 } };
1540 
1541 static const struct attribute_group it87_group_temp[3] = {
1542         { .attrs = it87_attributes_temp[0] },
1543         { .attrs = it87_attributes_temp[1] },
1544         { .attrs = it87_attributes_temp[2] },
1545 };
1546 
1547 static struct attribute *it87_attributes_temp_offset[] = {
1548         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1549         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1550         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1551 };
1552 
1553 static struct attribute *it87_attributes[] = {
1554         &dev_attr_alarms.attr,
1555         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1556         &dev_attr_name.attr,
1557         NULL
1558 };
1559 
1560 static const struct attribute_group it87_group = {
1561         .attrs = it87_attributes,
1562 };
1563 
1564 static struct attribute *it87_attributes_in_beep[] = {
1565         &sensor_dev_attr_in0_beep.dev_attr.attr,
1566         &sensor_dev_attr_in1_beep.dev_attr.attr,
1567         &sensor_dev_attr_in2_beep.dev_attr.attr,
1568         &sensor_dev_attr_in3_beep.dev_attr.attr,
1569         &sensor_dev_attr_in4_beep.dev_attr.attr,
1570         &sensor_dev_attr_in5_beep.dev_attr.attr,
1571         &sensor_dev_attr_in6_beep.dev_attr.attr,
1572         &sensor_dev_attr_in7_beep.dev_attr.attr,
1573         NULL,
1574         NULL,
1575 };
1576 
1577 static struct attribute *it87_attributes_temp_beep[] = {
1578         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1579         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1580         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1581 };
1582 
1583 static struct attribute *it87_attributes_fan[5][3+1] = { {
1584         &sensor_dev_attr_fan1_input.dev_attr.attr,
1585         &sensor_dev_attr_fan1_min.dev_attr.attr,
1586         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1587         NULL
1588 }, {
1589         &sensor_dev_attr_fan2_input.dev_attr.attr,
1590         &sensor_dev_attr_fan2_min.dev_attr.attr,
1591         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1592         NULL
1593 }, {
1594         &sensor_dev_attr_fan3_input.dev_attr.attr,
1595         &sensor_dev_attr_fan3_min.dev_attr.attr,
1596         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1597         NULL
1598 }, {
1599         &sensor_dev_attr_fan4_input.dev_attr.attr,
1600         &sensor_dev_attr_fan4_min.dev_attr.attr,
1601         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1602         NULL
1603 }, {
1604         &sensor_dev_attr_fan5_input.dev_attr.attr,
1605         &sensor_dev_attr_fan5_min.dev_attr.attr,
1606         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1607         NULL
1608 } };
1609 
1610 static const struct attribute_group it87_group_fan[5] = {
1611         { .attrs = it87_attributes_fan[0] },
1612         { .attrs = it87_attributes_fan[1] },
1613         { .attrs = it87_attributes_fan[2] },
1614         { .attrs = it87_attributes_fan[3] },
1615         { .attrs = it87_attributes_fan[4] },
1616 };
1617 
1618 static const struct attribute *it87_attributes_fan_div[] = {
1619         &sensor_dev_attr_fan1_div.dev_attr.attr,
1620         &sensor_dev_attr_fan2_div.dev_attr.attr,
1621         &sensor_dev_attr_fan3_div.dev_attr.attr,
1622 };
1623 
1624 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1625         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1626         &sensor_dev_attr_pwm1.dev_attr.attr,
1627         &dev_attr_pwm1_freq.attr,
1628         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1629         NULL
1630 }, {
1631         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1632         &sensor_dev_attr_pwm2.dev_attr.attr,
1633         &dev_attr_pwm2_freq.attr,
1634         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1635         NULL
1636 }, {
1637         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1638         &sensor_dev_attr_pwm3.dev_attr.attr,
1639         &dev_attr_pwm3_freq.attr,
1640         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1641         NULL
1642 } };
1643 
1644 static const struct attribute_group it87_group_pwm[3] = {
1645         { .attrs = it87_attributes_pwm[0] },
1646         { .attrs = it87_attributes_pwm[1] },
1647         { .attrs = it87_attributes_pwm[2] },
1648 };
1649 
1650 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1651         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1652         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1653         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1654         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1655         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1656         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1657         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1658         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1659         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1660         NULL
1661 }, {
1662         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1663         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1664         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1665         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1666         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1667         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1668         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1669         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1670         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1671         NULL
1672 }, {
1673         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1674         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1675         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1676         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1677         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1678         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1679         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1680         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1681         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1682         NULL
1683 } };
1684 
1685 static const struct attribute_group it87_group_autopwm[3] = {
1686         { .attrs = it87_attributes_autopwm[0] },
1687         { .attrs = it87_attributes_autopwm[1] },
1688         { .attrs = it87_attributes_autopwm[2] },
1689 };
1690 
1691 static struct attribute *it87_attributes_fan_beep[] = {
1692         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1693         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1694         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1695         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1696         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1697 };
1698 
1699 static struct attribute *it87_attributes_vid[] = {
1700         &dev_attr_vrm.attr,
1701         &dev_attr_cpu0_vid.attr,
1702         NULL
1703 };
1704 
1705 static const struct attribute_group it87_group_vid = {
1706         .attrs = it87_attributes_vid,
1707 };
1708 
1709 static struct attribute *it87_attributes_label[] = {
1710         &sensor_dev_attr_in3_label.dev_attr.attr,
1711         &sensor_dev_attr_in7_label.dev_attr.attr,
1712         &sensor_dev_attr_in8_label.dev_attr.attr,
1713         &sensor_dev_attr_in9_label.dev_attr.attr,
1714         NULL
1715 };
1716 
1717 static const struct attribute_group it87_group_label = {
1718         .attrs = it87_attributes_label,
1719 };
1720 
1721 /* SuperIO detection - will change isa_address if a chip is found */
1722 static int __init it87_find(unsigned short *address,
1723         struct it87_sio_data *sio_data)
1724 {
1725         int err;
1726         u16 chip_type;
1727         const char *board_vendor, *board_name;
1728 
1729         err = superio_enter();
1730         if (err)
1731                 return err;
1732 
1733         err = -ENODEV;
1734         chip_type = force_id ? force_id : superio_inw(DEVID);
1735 
1736         switch (chip_type) {
1737         case IT8705F_DEVID:
1738                 sio_data->type = it87;
1739                 break;
1740         case IT8712F_DEVID:
1741                 sio_data->type = it8712;
1742                 break;
1743         case IT8716F_DEVID:
1744         case IT8726F_DEVID:
1745                 sio_data->type = it8716;
1746                 break;
1747         case IT8718F_DEVID:
1748                 sio_data->type = it8718;
1749                 break;
1750         case IT8720F_DEVID:
1751                 sio_data->type = it8720;
1752                 break;
1753         case IT8721F_DEVID:
1754                 sio_data->type = it8721;
1755                 break;
1756         case IT8728F_DEVID:
1757                 sio_data->type = it8728;
1758                 break;
1759         case IT8771E_DEVID:
1760                 sio_data->type = it8771;
1761                 break;
1762         case IT8772E_DEVID:
1763                 sio_data->type = it8772;
1764                 break;
1765         case IT8782F_DEVID:
1766                 sio_data->type = it8782;
1767                 break;
1768         case IT8783E_DEVID:
1769                 sio_data->type = it8783;
1770                 break;
1771         case IT8603E_DEVID:
1772         case IT8623E_DEVID:
1773                 sio_data->type = it8603;
1774                 break;
1775         case 0xffff:    /* No device at all */
1776                 goto exit;
1777         default:
1778                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1779                 goto exit;
1780         }
1781 
1782         superio_select(PME);
1783         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1784                 pr_info("Device not activated, skipping\n");
1785                 goto exit;
1786         }
1787 
1788         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1789         if (*address == 0) {
1790                 pr_info("Base address not set, skipping\n");
1791                 goto exit;
1792         }
1793 
1794         err = 0;
1795         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1796         pr_info("Found IT%04x%c chip at 0x%x, revision %d\n", chip_type,
1797                 chip_type == 0x8771 || chip_type == 0x8772 ||
1798                 chip_type == 0x8603 ? 'E' : 'F', *address,
1799                 sio_data->revision);
1800 
1801         /* in8 (Vbat) is always internal */
1802         sio_data->internal = (1 << 2);
1803         /* Only the IT8603E has in9 */
1804         if (sio_data->type != it8603)
1805                 sio_data->skip_in |= (1 << 9);
1806 
1807         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1808         if (sio_data->type == it87) {
1809                 /* The IT8705F doesn't have VID pins at all */
1810                 sio_data->skip_vid = 1;
1811 
1812                 /* The IT8705F has a different LD number for GPIO */
1813                 superio_select(5);
1814                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1815         } else if (sio_data->type == it8783) {
1816                 int reg25, reg27, reg2a, reg2c, regef;
1817 
1818                 sio_data->skip_vid = 1; /* No VID */
1819 
1820                 superio_select(GPIO);
1821 
1822                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1823                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1824                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1825                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1826                 regef = superio_inb(IT87_SIO_SPI_REG);
1827 
1828                 /* Check if fan3 is there or not */
1829                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1830                         sio_data->skip_fan |= (1 << 2);
1831                 if ((reg25 & (1 << 4))
1832                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1833                         sio_data->skip_pwm |= (1 << 2);
1834 
1835                 /* Check if fan2 is there or not */
1836                 if (reg27 & (1 << 7))
1837                         sio_data->skip_fan |= (1 << 1);
1838                 if (reg27 & (1 << 3))
1839                         sio_data->skip_pwm |= (1 << 1);
1840 
1841                 /* VIN5 */
1842                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1843                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1844 
1845                 /* VIN6 */
1846                 if (reg27 & (1 << 1))
1847                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1848 
1849                 /*
1850                  * VIN7
1851                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1852                  */
1853                 if (reg27 & (1 << 2)) {
1854                         /*
1855                          * The data sheet is a bit unclear regarding the
1856                          * internal voltage divider for VCCH5V. It says
1857                          * "This bit enables and switches VIN7 (pin 91) to the
1858                          * internal voltage divider for VCCH5V".
1859                          * This is different to other chips, where the internal
1860                          * voltage divider would connect VIN7 to an internal
1861                          * voltage source. Maybe that is the case here as well.
1862                          *
1863                          * Since we don't know for sure, re-route it if that is
1864                          * not the case, and ask the user to report if the
1865                          * resulting voltage is sane.
1866                          */
1867                         if (!(reg2c & (1 << 1))) {
1868                                 reg2c |= (1 << 1);
1869                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
1870                                 pr_notice("Routing internal VCCH5V to in7.\n");
1871                         }
1872                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1873                         pr_notice("Please report if it displays a reasonable voltage.\n");
1874                 }
1875 
1876                 if (reg2c & (1 << 0))
1877                         sio_data->internal |= (1 << 0);
1878                 if (reg2c & (1 << 1))
1879                         sio_data->internal |= (1 << 1);
1880 
1881                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1882         } else if (sio_data->type == it8603) {
1883                 int reg27, reg29;
1884 
1885                 sio_data->skip_vid = 1; /* No VID */
1886                 superio_select(GPIO);
1887 
1888                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1889 
1890                 /* Check if fan3 is there or not */
1891                 if (reg27 & (1 << 6))
1892                         sio_data->skip_pwm |= (1 << 2);
1893                 if (reg27 & (1 << 7))
1894                         sio_data->skip_fan |= (1 << 2);
1895 
1896                 /* Check if fan2 is there or not */
1897                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
1898                 if (reg29 & (1 << 1))
1899                         sio_data->skip_pwm |= (1 << 1);
1900                 if (reg29 & (1 << 2))
1901                         sio_data->skip_fan |= (1 << 1);
1902 
1903                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
1904                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
1905 
1906                 /* no fan4 */
1907                 sio_data->skip_pwm |= (1 << 3);
1908                 sio_data->skip_fan |= (1 << 3);
1909 
1910                 sio_data->internal |= (1 << 1); /* in7 is VSB */
1911                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
1912 
1913                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1914         } else {
1915                 int reg;
1916                 bool uart6;
1917 
1918                 superio_select(GPIO);
1919 
1920                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1921                 if (sio_data->type == it8721 || sio_data->type == it8728 ||
1922                     sio_data->type == it8771 || sio_data->type == it8772 ||
1923                     sio_data->type == it8782) {
1924                         /*
1925                          * IT8721F/IT8758E, and IT8782F don't have VID pins
1926                          * at all, not sure about the IT8728F and compatibles.
1927                          */
1928                         sio_data->skip_vid = 1;
1929                 } else {
1930                         /* We need at least 4 VID pins */
1931                         if (reg & 0x0f) {
1932                                 pr_info("VID is disabled (pins used for GPIO)\n");
1933                                 sio_data->skip_vid = 1;
1934                         }
1935                 }
1936 
1937                 /* Check if fan3 is there or not */
1938                 if (reg & (1 << 6))
1939                         sio_data->skip_pwm |= (1 << 2);
1940                 if (reg & (1 << 7))
1941                         sio_data->skip_fan |= (1 << 2);
1942 
1943                 /* Check if fan2 is there or not */
1944                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1945                 if (reg & (1 << 1))
1946                         sio_data->skip_pwm |= (1 << 1);
1947                 if (reg & (1 << 2))
1948                         sio_data->skip_fan |= (1 << 1);
1949 
1950                 if ((sio_data->type == it8718 || sio_data->type == it8720)
1951                  && !(sio_data->skip_vid))
1952                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1953 
1954                 reg = superio_inb(IT87_SIO_PINX2_REG);
1955 
1956                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
1957 
1958                 /*
1959                  * The IT8720F has no VIN7 pin, so VCCH should always be
1960                  * routed internally to VIN7 with an internal divider.
1961                  * Curiously, there still is a configuration bit to control
1962                  * this, which means it can be set incorrectly. And even
1963                  * more curiously, many boards out there are improperly
1964                  * configured, even though the IT8720F datasheet claims
1965                  * that the internal routing of VCCH to VIN7 is the default
1966                  * setting. So we force the internal routing in this case.
1967                  *
1968                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1969                  * If UART6 is enabled, re-route VIN7 to the internal divider
1970                  * if that is not already the case.
1971                  */
1972                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
1973                         reg |= (1 << 1);
1974                         superio_outb(IT87_SIO_PINX2_REG, reg);
1975                         pr_notice("Routing internal VCCH to in7\n");
1976                 }
1977                 if (reg & (1 << 0))
1978                         sio_data->internal |= (1 << 0);
1979                 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1980                     sio_data->type == it8728 ||
1981                     sio_data->type == it8771 ||
1982                     sio_data->type == it8772)
1983                         sio_data->internal |= (1 << 1);
1984 
1985                 /*
1986                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
1987                  * While VIN7 can be routed to the internal voltage divider,
1988                  * VIN5 and VIN6 are not available if UART6 is enabled.
1989                  *
1990                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
1991                  * is the temperature source. Since we can not read the
1992                  * temperature source here, skip_temp is preliminary.
1993                  */
1994                 if (uart6) {
1995                         sio_data->skip_in |= (1 << 5) | (1 << 6);
1996                         sio_data->skip_temp |= (1 << 2);
1997                 }
1998 
1999                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
2000         }
2001         if (sio_data->beep_pin)
2002                 pr_info("Beeping is supported\n");
2003 
2004         /* Disable specific features based on DMI strings */
2005         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2006         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2007         if (board_vendor && board_name) {
2008                 if (strcmp(board_vendor, "nVIDIA") == 0
2009                  && strcmp(board_name, "FN68PT") == 0) {
2010                         /*
2011                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2012                          * connected to a fan, but to something else. One user
2013                          * has reported instant system power-off when changing
2014                          * the PWM2 duty cycle, so we disable it.
2015                          * I use the board name string as the trigger in case
2016                          * the same board is ever used in other systems.
2017                          */
2018                         pr_info("Disabling pwm2 due to hardware constraints\n");
2019                         sio_data->skip_pwm = (1 << 1);
2020                 }
2021         }
2022 
2023 exit:
2024         superio_exit();
2025         return err;
2026 }
2027 
2028 static void it87_remove_files(struct device *dev)
2029 {
2030         struct it87_data *data = platform_get_drvdata(pdev);
2031         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2032         int i;
2033 
2034         sysfs_remove_group(&dev->kobj, &it87_group);
2035         for (i = 0; i < 10; i++) {
2036                 if (sio_data->skip_in & (1 << i))
2037                         continue;
2038                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2039                 if (it87_attributes_in_beep[i])
2040                         sysfs_remove_file(&dev->kobj,
2041                                           it87_attributes_in_beep[i]);
2042         }
2043         for (i = 0; i < 3; i++) {
2044                 if (!(data->has_temp & (1 << i)))
2045                         continue;
2046                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2047                 if (has_temp_offset(data))
2048                         sysfs_remove_file(&dev->kobj,
2049                                           it87_attributes_temp_offset[i]);
2050                 if (sio_data->beep_pin)
2051                         sysfs_remove_file(&dev->kobj,
2052                                           it87_attributes_temp_beep[i]);
2053         }
2054         for (i = 0; i < 5; i++) {
2055                 if (!(data->has_fan & (1 << i)))
2056                         continue;
2057                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2058                 if (sio_data->beep_pin)
2059                         sysfs_remove_file(&dev->kobj,
2060                                           it87_attributes_fan_beep[i]);
2061                 if (i < 3 && !has_16bit_fans(data))
2062                         sysfs_remove_file(&dev->kobj,
2063                                           it87_attributes_fan_div[i]);
2064         }
2065         for (i = 0; i < 3; i++) {
2066                 if (sio_data->skip_pwm & (1 << 0))
2067                         continue;
2068                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2069                 if (has_old_autopwm(data))
2070                         sysfs_remove_group(&dev->kobj,
2071                                            &it87_group_autopwm[i]);
2072         }
2073         if (!sio_data->skip_vid)
2074                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2075         sysfs_remove_group(&dev->kobj, &it87_group_label);
2076 }
2077 
2078 static int it87_probe(struct platform_device *pdev)
2079 {
2080         struct it87_data *data;
2081         struct resource *res;
2082         struct device *dev = &pdev->dev;
2083         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2084         int err = 0, i;
2085         int enable_pwm_interface;
2086         int fan_beep_need_rw;
2087 
2088         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2089         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2090                                  DRVNAME)) {
2091                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2092                         (unsigned long)res->start,
2093                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2094                 return -EBUSY;
2095         }
2096 
2097         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2098         if (!data)
2099                 return -ENOMEM;
2100 
2101         data->addr = res->start;
2102         data->type = sio_data->type;
2103         data->features = it87_devices[sio_data->type].features;
2104         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2105         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2106         data->name = it87_devices[sio_data->type].name;
2107         /*
2108          * IT8705F Datasheet 0.4.1, 3h == Version G.
2109          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2110          * These are the first revisions with 16-bit tachometer support.
2111          */
2112         switch (data->type) {
2113         case it87:
2114                 if (sio_data->revision >= 0x03) {
2115                         data->features &= ~FEAT_OLD_AUTOPWM;
2116                         data->features |= FEAT_16BIT_FANS;
2117                 }
2118                 break;
2119         case it8712:
2120                 if (sio_data->revision >= 0x08) {
2121                         data->features &= ~FEAT_OLD_AUTOPWM;
2122                         data->features |= FEAT_16BIT_FANS;
2123                 }
2124                 break;
2125         default:
2126                 break;
2127         }
2128 
2129         /* Now, we do the remaining detection. */
2130         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2131          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2132                 return -ENODEV;
2133 
2134         platform_set_drvdata(pdev, data);
2135 
2136         mutex_init(&data->update_lock);
2137 
2138         /* Check PWM configuration */
2139         enable_pwm_interface = it87_check_pwm(dev);
2140 
2141         /* Starting with IT8721F, we handle scaling of internal voltages */
2142         if (has_12mv_adc(data)) {
2143                 if (sio_data->internal & (1 << 0))
2144                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2145                 if (sio_data->internal & (1 << 1))
2146                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2147                 if (sio_data->internal & (1 << 2))
2148                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2149                 if (sio_data->internal & (1 << 3))
2150                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2151         } else if (sio_data->type == it8782 || sio_data->type == it8783) {
2152                 if (sio_data->internal & (1 << 0))
2153                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2154                 if (sio_data->internal & (1 << 1))
2155                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2156         }
2157 
2158         data->has_temp = 0x07;
2159         if (sio_data->skip_temp & (1 << 2)) {
2160                 if (sio_data->type == it8782
2161                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2162                         data->has_temp &= ~(1 << 2);
2163         }
2164 
2165         /* Initialize the IT87 chip */
2166         it87_init_device(pdev);
2167 
2168         /* Register sysfs hooks */
2169         err = sysfs_create_group(&dev->kobj, &it87_group);
2170         if (err)
2171                 return err;
2172 
2173         for (i = 0; i < 10; i++) {
2174                 if (sio_data->skip_in & (1 << i))
2175                         continue;
2176                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2177                 if (err)
2178                         goto error;
2179                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2180                         err = sysfs_create_file(&dev->kobj,
2181                                                 it87_attributes_in_beep[i]);
2182                         if (err)
2183                                 goto error;
2184                 }
2185         }
2186 
2187         for (i = 0; i < 3; i++) {
2188                 if (!(data->has_temp & (1 << i)))
2189                         continue;
2190                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2191                 if (err)
2192                         goto error;
2193                 if (has_temp_offset(data)) {
2194                         err = sysfs_create_file(&dev->kobj,
2195                                                 it87_attributes_temp_offset[i]);
2196                         if (err)
2197                                 goto error;
2198                 }
2199                 if (sio_data->beep_pin) {
2200                         err = sysfs_create_file(&dev->kobj,
2201                                                 it87_attributes_temp_beep[i]);
2202                         if (err)
2203                                 goto error;
2204                 }
2205         }
2206 
2207         /* Do not create fan files for disabled fans */
2208         fan_beep_need_rw = 1;
2209         for (i = 0; i < 5; i++) {
2210                 if (!(data->has_fan & (1 << i)))
2211                         continue;
2212                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2213                 if (err)
2214                         goto error;
2215 
2216                 if (i < 3 && !has_16bit_fans(data)) {
2217                         err = sysfs_create_file(&dev->kobj,
2218                                                 it87_attributes_fan_div[i]);
2219                         if (err)
2220                                 goto error;
2221                 }
2222 
2223                 if (sio_data->beep_pin) {
2224                         err = sysfs_create_file(&dev->kobj,
2225                                                 it87_attributes_fan_beep[i]);
2226                         if (err)
2227                                 goto error;
2228                         if (!fan_beep_need_rw)
2229                                 continue;
2230 
2231                         /*
2232                          * As we have a single beep enable bit for all fans,
2233                          * only the first enabled fan has a writable attribute
2234                          * for it.
2235                          */
2236                         if (sysfs_chmod_file(&dev->kobj,
2237                                              it87_attributes_fan_beep[i],
2238                                              S_IRUGO | S_IWUSR))
2239                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2240                                         i + 1);
2241                         fan_beep_need_rw = 0;
2242                 }
2243         }
2244 
2245         if (enable_pwm_interface) {
2246                 for (i = 0; i < 3; i++) {
2247                         if (sio_data->skip_pwm & (1 << i))
2248                                 continue;
2249                         err = sysfs_create_group(&dev->kobj,
2250                                                  &it87_group_pwm[i]);
2251                         if (err)
2252                                 goto error;
2253 
2254                         if (!has_old_autopwm(data))
2255                                 continue;
2256                         err = sysfs_create_group(&dev->kobj,
2257                                                  &it87_group_autopwm[i]);
2258                         if (err)
2259                                 goto error;
2260                 }
2261         }
2262 
2263         if (!sio_data->skip_vid) {
2264                 data->vrm = vid_which_vrm();
2265                 /* VID reading from Super-I/O config space if available */
2266                 data->vid = sio_data->vid_value;
2267                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2268                 if (err)
2269                         goto error;
2270         }
2271 
2272         /* Export labels for internal sensors */
2273         for (i = 0; i < 4; i++) {
2274                 if (!(sio_data->internal & (1 << i)))
2275                         continue;
2276                 err = sysfs_create_file(&dev->kobj,
2277                                         it87_attributes_label[i]);
2278                 if (err)
2279                         goto error;
2280         }
2281 
2282         data->hwmon_dev = hwmon_device_register(dev);
2283         if (IS_ERR(data->hwmon_dev)) {
2284                 err = PTR_ERR(data->hwmon_dev);
2285                 goto error;
2286         }
2287 
2288         return 0;
2289 
2290 error:
2291         it87_remove_files(dev);
2292         return err;
2293 }
2294 
2295 static int it87_remove(struct platform_device *pdev)
2296 {
2297         struct it87_data *data = platform_get_drvdata(pdev);
2298 
2299         hwmon_device_unregister(data->hwmon_dev);
2300         it87_remove_files(&pdev->dev);
2301 
2302         return 0;
2303 }
2304 
2305 /*
2306  * Must be called with data->update_lock held, except during initialization.
2307  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2308  * would slow down the IT87 access and should not be necessary.
2309  */
2310 static int it87_read_value(struct it87_data *data, u8 reg)
2311 {
2312         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2313         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2314 }
2315 
2316 /*
2317  * Must be called with data->update_lock held, except during initialization.
2318  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2319  * would slow down the IT87 access and should not be necessary.
2320  */
2321 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2322 {
2323         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2324         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2325 }
2326 
2327 /* Return 1 if and only if the PWM interface is safe to use */
2328 static int it87_check_pwm(struct device *dev)
2329 {
2330         struct it87_data *data = dev_get_drvdata(dev);
2331         /*
2332          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2333          * and polarity set to active low is sign that this is the case so we
2334          * disable pwm control to protect the user.
2335          */
2336         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2337         if ((tmp & 0x87) == 0) {
2338                 if (fix_pwm_polarity) {
2339                         /*
2340                          * The user asks us to attempt a chip reconfiguration.
2341                          * This means switching to active high polarity and
2342                          * inverting all fan speed values.
2343                          */
2344                         int i;
2345                         u8 pwm[3];
2346 
2347                         for (i = 0; i < 3; i++)
2348                                 pwm[i] = it87_read_value(data,
2349                                                          IT87_REG_PWM(i));
2350 
2351                         /*
2352                          * If any fan is in automatic pwm mode, the polarity
2353                          * might be correct, as suspicious as it seems, so we
2354                          * better don't change anything (but still disable the
2355                          * PWM interface).
2356                          */
2357                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2358                                 dev_info(dev,
2359                                          "Reconfiguring PWM to active high polarity\n");
2360                                 it87_write_value(data, IT87_REG_FAN_CTL,
2361                                                  tmp | 0x87);
2362                                 for (i = 0; i < 3; i++)
2363                                         it87_write_value(data,
2364                                                          IT87_REG_PWM(i),
2365                                                          0x7f & ~pwm[i]);
2366                                 return 1;
2367                         }
2368 
2369                         dev_info(dev,
2370                                  "PWM configuration is too broken to be fixed\n");
2371                 }
2372 
2373                 dev_info(dev,
2374                          "Detected broken BIOS defaults, disabling PWM interface\n");
2375                 return 0;
2376         } else if (fix_pwm_polarity) {
2377                 dev_info(dev,
2378                          "PWM configuration looks sane, won't touch\n");
2379         }
2380 
2381         return 1;
2382 }
2383 
2384 /* Called when we have found a new IT87. */
2385 static void it87_init_device(struct platform_device *pdev)
2386 {
2387         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2388         struct it87_data *data = platform_get_drvdata(pdev);
2389         int tmp, i;
2390         u8 mask;
2391 
2392         /*
2393          * For each PWM channel:
2394          * - If it is in automatic mode, setting to manual mode should set
2395          *   the fan to full speed by default.
2396          * - If it is in manual mode, we need a mapping to temperature
2397          *   channels to use when later setting to automatic mode later.
2398          *   Use a 1:1 mapping by default (we are clueless.)
2399          * In both cases, the value can (and should) be changed by the user
2400          * prior to switching to a different mode.
2401          * Note that this is no longer needed for the IT8721F and later, as
2402          * these have separate registers for the temperature mapping and the
2403          * manual duty cycle.
2404          */
2405         for (i = 0; i < 3; i++) {
2406                 data->pwm_temp_map[i] = i;
2407                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2408                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2409         }
2410 
2411         /*
2412          * Some chips seem to have default value 0xff for all limit
2413          * registers. For low voltage limits it makes no sense and triggers
2414          * alarms, so change to 0 instead. For high temperature limits, it
2415          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2416          * but is still confusing, so change to 127 degrees C.
2417          */
2418         for (i = 0; i < 8; i++) {
2419                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2420                 if (tmp == 0xff)
2421                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2422         }
2423         for (i = 0; i < 3; i++) {
2424                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2425                 if (tmp == 0xff)
2426                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2427         }
2428 
2429         /*
2430          * Temperature channels are not forcibly enabled, as they can be
2431          * set to two different sensor types and we can't guess which one
2432          * is correct for a given system. These channels can be enabled at
2433          * run-time through the temp{1-3}_type sysfs accessors if needed.
2434          */
2435 
2436         /* Check if voltage monitors are reset manually or by some reason */
2437         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2438         if ((tmp & 0xff) == 0) {
2439                 /* Enable all voltage monitors */
2440                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2441         }
2442 
2443         /* Check if tachometers are reset manually or by some reason */
2444         mask = 0x70 & ~(sio_data->skip_fan << 4);
2445         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2446         if ((data->fan_main_ctrl & mask) == 0) {
2447                 /* Enable all fan tachometers */
2448                 data->fan_main_ctrl |= mask;
2449                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2450                                  data->fan_main_ctrl);
2451         }
2452         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2453 
2454         /* Set tachometers to 16-bit mode if needed, IT8603E (and IT8728F?)
2455          * has it by default */
2456         if (has_16bit_fans(data) && data->type != it8603) {
2457                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2458                 if (~tmp & 0x07 & data->has_fan) {
2459                         dev_dbg(&pdev->dev,
2460                                 "Setting fan1-3 to 16-bit mode\n");
2461                         it87_write_value(data, IT87_REG_FAN_16BIT,
2462                                          tmp | 0x07);
2463                 }
2464                 /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
2465                 if (data->type != it87 && data->type != it8782 &&
2466                     data->type != it8783) {
2467                         if (tmp & (1 << 4))
2468                                 data->has_fan |= (1 << 3); /* fan4 enabled */
2469                         if (tmp & (1 << 5))
2470                                 data->has_fan |= (1 << 4); /* fan5 enabled */
2471                 }
2472         }
2473 
2474         /* Fan input pins may be used for alternative functions */
2475         data->has_fan &= ~sio_data->skip_fan;
2476 
2477         /* Start monitoring */
2478         it87_write_value(data, IT87_REG_CONFIG,
2479                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2480                          | (update_vbat ? 0x41 : 0x01));
2481 }
2482 
2483 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2484 {
2485         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2486         if (has_newer_autopwm(data)) {
2487                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2488                 data->pwm_duty[nr] = it87_read_value(data,
2489                                                      IT87_REG_PWM_DUTY(nr));
2490         } else {
2491                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2492                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2493                 else                            /* Manual mode */
2494                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2495         }
2496 
2497         if (has_old_autopwm(data)) {
2498                 int i;
2499 
2500                 for (i = 0; i < 5 ; i++)
2501                         data->auto_temp[nr][i] = it87_read_value(data,
2502                                                 IT87_REG_AUTO_TEMP(nr, i));
2503                 for (i = 0; i < 3 ; i++)
2504                         data->auto_pwm[nr][i] = it87_read_value(data,
2505                                                 IT87_REG_AUTO_PWM(nr, i));
2506         }
2507 }
2508 
2509 static struct it87_data *it87_update_device(struct device *dev)
2510 {
2511         struct it87_data *data = dev_get_drvdata(dev);
2512         int i;
2513 
2514         mutex_lock(&data->update_lock);
2515 
2516         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2517             || !data->valid) {
2518                 if (update_vbat) {
2519                         /*
2520                          * Cleared after each update, so reenable.  Value
2521                          * returned by this read will be previous value
2522                          */
2523                         it87_write_value(data, IT87_REG_CONFIG,
2524                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2525                 }
2526                 for (i = 0; i <= 7; i++) {
2527                         data->in[i][0] =
2528                                 it87_read_value(data, IT87_REG_VIN(i));
2529                         data->in[i][1] =
2530                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2531                         data->in[i][2] =
2532                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2533                 }
2534                 /* in8 (battery) has no limit registers */
2535                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2536                 if (data->type == it8603)
2537                         data->in[9][0] = it87_read_value(data, 0x2f);
2538 
2539                 for (i = 0; i < 5; i++) {
2540                         /* Skip disabled fans */
2541                         if (!(data->has_fan & (1 << i)))
2542                                 continue;
2543 
2544                         data->fan[i][1] =
2545                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2546                         data->fan[i][0] = it87_read_value(data,
2547                                        IT87_REG_FAN[i]);
2548                         /* Add high byte if in 16-bit mode */
2549                         if (has_16bit_fans(data)) {
2550                                 data->fan[i][0] |= it87_read_value(data,
2551                                                 IT87_REG_FANX[i]) << 8;
2552                                 data->fan[i][1] |= it87_read_value(data,
2553                                                 IT87_REG_FANX_MIN[i]) << 8;
2554                         }
2555                 }
2556                 for (i = 0; i < 3; i++) {
2557                         if (!(data->has_temp & (1 << i)))
2558                                 continue;
2559                         data->temp[i][0] =
2560                                 it87_read_value(data, IT87_REG_TEMP(i));
2561                         data->temp[i][1] =
2562                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2563                         data->temp[i][2] =
2564                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2565                         if (has_temp_offset(data))
2566                                 data->temp[i][3] =
2567                                   it87_read_value(data,
2568                                                   IT87_REG_TEMP_OFFSET[i]);
2569                 }
2570 
2571                 /* Newer chips don't have clock dividers */
2572                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2573                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2574                         data->fan_div[0] = i & 0x07;
2575                         data->fan_div[1] = (i >> 3) & 0x07;
2576                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2577                 }
2578 
2579                 data->alarms =
2580                         it87_read_value(data, IT87_REG_ALARM1) |
2581                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2582                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2583                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2584 
2585                 data->fan_main_ctrl = it87_read_value(data,
2586                                 IT87_REG_FAN_MAIN_CTRL);
2587                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2588                 for (i = 0; i < 3; i++)
2589                         it87_update_pwm_ctrl(data, i);
2590 
2591                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2592                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2593                 /*
2594                  * The IT8705F does not have VID capability.
2595                  * The IT8718F and later don't use IT87_REG_VID for the
2596                  * same purpose.
2597                  */
2598                 if (data->type == it8712 || data->type == it8716) {
2599                         data->vid = it87_read_value(data, IT87_REG_VID);
2600                         /*
2601                          * The older IT8712F revisions had only 5 VID pins,
2602                          * but we assume it is always safe to read 6 bits.
2603                          */
2604                         data->vid &= 0x3f;
2605                 }
2606                 data->last_updated = jiffies;
2607                 data->valid = 1;
2608         }
2609 
2610         mutex_unlock(&data->update_lock);
2611 
2612         return data;
2613 }
2614 
2615 static int __init it87_device_add(unsigned short address,
2616                                   const struct it87_sio_data *sio_data)
2617 {
2618         struct resource res = {
2619                 .start  = address + IT87_EC_OFFSET,
2620                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2621                 .name   = DRVNAME,
2622                 .flags  = IORESOURCE_IO,
2623         };
2624         int err;
2625 
2626         err = acpi_check_resource_conflict(&res);
2627         if (err)
2628                 goto exit;
2629 
2630         pdev = platform_device_alloc(DRVNAME, address);
2631         if (!pdev) {
2632                 err = -ENOMEM;
2633                 pr_err("Device allocation failed\n");
2634                 goto exit;
2635         }
2636 
2637         err = platform_device_add_resources(pdev, &res, 1);
2638         if (err) {
2639                 pr_err("Device resource addition failed (%d)\n", err);
2640                 goto exit_device_put;
2641         }
2642 
2643         err = platform_device_add_data(pdev, sio_data,
2644                                        sizeof(struct it87_sio_data));
2645         if (err) {
2646                 pr_err("Platform data allocation failed\n");
2647                 goto exit_device_put;
2648         }
2649 
2650         err = platform_device_add(pdev);
2651         if (err) {
2652                 pr_err("Device addition failed (%d)\n", err);
2653                 goto exit_device_put;
2654         }
2655 
2656         return 0;
2657 
2658 exit_device_put:
2659         platform_device_put(pdev);
2660 exit:
2661         return err;
2662 }
2663 
2664 static int __init sm_it87_init(void)
2665 {
2666         int err;
2667         unsigned short isa_address = 0;
2668         struct it87_sio_data sio_data;
2669 
2670         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2671         err = it87_find(&isa_address, &sio_data);
2672         if (err)
2673                 return err;
2674         err = platform_driver_register(&it87_driver);
2675         if (err)
2676                 return err;
2677 
2678         err = it87_device_add(isa_address, &sio_data);
2679         if (err) {
2680                 platform_driver_unregister(&it87_driver);
2681                 return err;
2682         }
2683 
2684         return 0;
2685 }
2686 
2687 static void __exit sm_it87_exit(void)
2688 {
2689         platform_device_unregister(pdev);
2690         platform_driver_unregister(&it87_driver);
2691 }
2692 
2693 
2694 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2695 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2696 module_param(update_vbat, bool, 0);
2697 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2698 module_param(fix_pwm_polarity, bool, 0);
2699 MODULE_PARM_DESC(fix_pwm_polarity,
2700                  "Force PWM polarity to active high (DANGEROUS)");
2701 MODULE_LICENSE("GPL");
2702 
2703 module_init(sm_it87_init);
2704 module_exit(sm_it87_exit);
2705 

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