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Linux/drivers/hwmon/it87.c

  1 /*
  2  *  it87.c - Part of lm_sensors, Linux kernel modules for hardware
  3  *           monitoring.
  4  *
  5  *  The IT8705F is an LPC-based Super I/O part that contains UARTs, a
  6  *  parallel port, an IR port, a MIDI port, a floppy controller, etc., in
  7  *  addition to an Environment Controller (Enhanced Hardware Monitor and
  8  *  Fan Controller)
  9  *
 10  *  This driver supports only the Environment Controller in the IT8705F and
 11  *  similar parts.  The other devices are supported by different drivers.
 12  *
 13  *  Supports: IT8603E  Super I/O chip w/LPC interface
 14  *            IT8705F  Super I/O chip w/LPC interface
 15  *            IT8712F  Super I/O chip w/LPC interface
 16  *            IT8716F  Super I/O chip w/LPC interface
 17  *            IT8718F  Super I/O chip w/LPC interface
 18  *            IT8720F  Super I/O chip w/LPC interface
 19  *            IT8721F  Super I/O chip w/LPC interface
 20  *            IT8726F  Super I/O chip w/LPC interface
 21  *            IT8728F  Super I/O chip w/LPC interface
 22  *            IT8758E  Super I/O chip w/LPC interface
 23  *            IT8771E  Super I/O chip w/LPC interface
 24  *            IT8772E  Super I/O chip w/LPC interface
 25  *            IT8782F  Super I/O chip w/LPC interface
 26  *            IT8783E/F Super I/O chip w/LPC interface
 27  *            Sis950   A clone of the IT8705F
 28  *
 29  *  Copyright (C) 2001 Chris Gauthron
 30  *  Copyright (C) 2005-2010 Jean Delvare <jdelvare@suse.de>
 31  *
 32  *  This program is free software; you can redistribute it and/or modify
 33  *  it under the terms of the GNU General Public License as published by
 34  *  the Free Software Foundation; either version 2 of the License, or
 35  *  (at your option) any later version.
 36  *
 37  *  This program is distributed in the hope that it will be useful,
 38  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 39  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 40  *  GNU General Public License for more details.
 41  *
 42  *  You should have received a copy of the GNU General Public License
 43  *  along with this program; if not, write to the Free Software
 44  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 45  */
 46 
 47 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 48 
 49 #include <linux/module.h>
 50 #include <linux/init.h>
 51 #include <linux/slab.h>
 52 #include <linux/jiffies.h>
 53 #include <linux/platform_device.h>
 54 #include <linux/hwmon.h>
 55 #include <linux/hwmon-sysfs.h>
 56 #include <linux/hwmon-vid.h>
 57 #include <linux/err.h>
 58 #include <linux/mutex.h>
 59 #include <linux/sysfs.h>
 60 #include <linux/string.h>
 61 #include <linux/dmi.h>
 62 #include <linux/acpi.h>
 63 #include <linux/io.h>
 64 
 65 #define DRVNAME "it87"
 66 
 67 enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8771,
 68              it8772, it8782, it8783, it8603 };
 69 
 70 static unsigned short force_id;
 71 module_param(force_id, ushort, 0);
 72 MODULE_PARM_DESC(force_id, "Override the detected device ID");
 73 
 74 static struct platform_device *pdev;
 75 
 76 #define REG     0x2e    /* The register to read/write */
 77 #define DEV     0x07    /* Register: Logical device select */
 78 #define VAL     0x2f    /* The value to read/write */
 79 #define PME     0x04    /* The device with the fan registers in it */
 80 
 81 /* The device with the IT8718F/IT8720F VID value in it */
 82 #define GPIO    0x07
 83 
 84 #define DEVID   0x20    /* Register: Device ID */
 85 #define DEVREV  0x22    /* Register: Device Revision */
 86 
 87 static inline int superio_inb(int reg)
 88 {
 89         outb(reg, REG);
 90         return inb(VAL);
 91 }
 92 
 93 static inline void superio_outb(int reg, int val)
 94 {
 95         outb(reg, REG);
 96         outb(val, VAL);
 97 }
 98 
 99 static int superio_inw(int reg)
100 {
101         int val;
102         outb(reg++, REG);
103         val = inb(VAL) << 8;
104         outb(reg, REG);
105         val |= inb(VAL);
106         return val;
107 }
108 
109 static inline void superio_select(int ldn)
110 {
111         outb(DEV, REG);
112         outb(ldn, VAL);
113 }
114 
115 static inline int superio_enter(void)
116 {
117         /*
118          * Try to reserve REG and REG + 1 for exclusive access.
119          */
120         if (!request_muxed_region(REG, 2, DRVNAME))
121                 return -EBUSY;
122 
123         outb(0x87, REG);
124         outb(0x01, REG);
125         outb(0x55, REG);
126         outb(0x55, REG);
127         return 0;
128 }
129 
130 static inline void superio_exit(void)
131 {
132         outb(0x02, REG);
133         outb(0x02, VAL);
134         release_region(REG, 2);
135 }
136 
137 /* Logical device 4 registers */
138 #define IT8712F_DEVID 0x8712
139 #define IT8705F_DEVID 0x8705
140 #define IT8716F_DEVID 0x8716
141 #define IT8718F_DEVID 0x8718
142 #define IT8720F_DEVID 0x8720
143 #define IT8721F_DEVID 0x8721
144 #define IT8726F_DEVID 0x8726
145 #define IT8728F_DEVID 0x8728
146 #define IT8771E_DEVID 0x8771
147 #define IT8772E_DEVID 0x8772
148 #define IT8782F_DEVID 0x8782
149 #define IT8783E_DEVID 0x8783
150 #define IT8306E_DEVID 0x8603
151 #define IT87_ACT_REG  0x30
152 #define IT87_BASE_REG 0x60
153 
154 /* Logical device 7 registers (IT8712F and later) */
155 #define IT87_SIO_GPIO1_REG      0x25
156 #define IT87_SIO_GPIO3_REG      0x27
157 #define IT87_SIO_GPIO5_REG      0x29
158 #define IT87_SIO_PINX1_REG      0x2a    /* Pin selection */
159 #define IT87_SIO_PINX2_REG      0x2c    /* Pin selection */
160 #define IT87_SIO_SPI_REG        0xef    /* SPI function pin select */
161 #define IT87_SIO_VID_REG        0xfc    /* VID value */
162 #define IT87_SIO_BEEP_PIN_REG   0xf6    /* Beep pin mapping */
163 
164 /* Update battery voltage after every reading if true */
165 static bool update_vbat;
166 
167 /* Not all BIOSes properly configure the PWM registers */
168 static bool fix_pwm_polarity;
169 
170 /* Many IT87 constants specified below */
171 
172 /* Length of ISA address segment */
173 #define IT87_EXTENT 8
174 
175 /* Length of ISA address segment for Environmental Controller */
176 #define IT87_EC_EXTENT 2
177 
178 /* Offset of EC registers from ISA base address */
179 #define IT87_EC_OFFSET 5
180 
181 /* Where are the ISA address/data registers relative to the EC base address */
182 #define IT87_ADDR_REG_OFFSET 0
183 #define IT87_DATA_REG_OFFSET 1
184 
185 /*----- The IT87 registers -----*/
186 
187 #define IT87_REG_CONFIG        0x00
188 
189 #define IT87_REG_ALARM1        0x01
190 #define IT87_REG_ALARM2        0x02
191 #define IT87_REG_ALARM3        0x03
192 
193 /*
194  * The IT8718F and IT8720F have the VID value in a different register, in
195  * Super-I/O configuration space.
196  */
197 #define IT87_REG_VID           0x0a
198 /*
199  * The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
200  * for fan divisors. Later IT8712F revisions must use 16-bit tachometer
201  * mode.
202  */
203 #define IT87_REG_FAN_DIV       0x0b
204 #define IT87_REG_FAN_16BIT     0x0c
205 
206 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
207 
208 static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
209 static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
210 static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
211 static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
212 static const u8 IT87_REG_TEMP_OFFSET[]  = { 0x56, 0x57, 0x59 };
213 
214 #define IT87_REG_FAN_MAIN_CTRL 0x13
215 #define IT87_REG_FAN_CTL       0x14
216 #define IT87_REG_PWM(nr)       (0x15 + (nr))
217 #define IT87_REG_PWM_DUTY(nr)  (0x63 + (nr) * 8)
218 
219 #define IT87_REG_VIN(nr)       (0x20 + (nr))
220 #define IT87_REG_TEMP(nr)      (0x29 + (nr))
221 
222 #define IT87_REG_VIN_MAX(nr)   (0x30 + (nr) * 2)
223 #define IT87_REG_VIN_MIN(nr)   (0x31 + (nr) * 2)
224 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
225 #define IT87_REG_TEMP_LOW(nr)  (0x41 + (nr) * 2)
226 
227 #define IT87_REG_VIN_ENABLE    0x50
228 #define IT87_REG_TEMP_ENABLE   0x51
229 #define IT87_REG_TEMP_EXTRA    0x55
230 #define IT87_REG_BEEP_ENABLE   0x5c
231 
232 #define IT87_REG_CHIPID        0x58
233 
234 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
235 #define IT87_REG_AUTO_PWM(nr, i)  (0x65 + (nr) * 8 + (i))
236 
237 struct it87_devices {
238         const char *name;
239         u16 features;
240         u8 peci_mask;
241         u8 old_peci_mask;
242 };
243 
244 #define FEAT_12MV_ADC           (1 << 0)
245 #define FEAT_NEWER_AUTOPWM      (1 << 1)
246 #define FEAT_OLD_AUTOPWM        (1 << 2)
247 #define FEAT_16BIT_FANS         (1 << 3)
248 #define FEAT_TEMP_OFFSET        (1 << 4)
249 #define FEAT_TEMP_PECI          (1 << 5)
250 #define FEAT_TEMP_OLD_PECI      (1 << 6)
251 
252 static const struct it87_devices it87_devices[] = {
253         [it87] = {
254                 .name = "it87",
255                 .features = FEAT_OLD_AUTOPWM,   /* may need to overwrite */
256         },
257         [it8712] = {
258                 .name = "it8712",
259                 .features = FEAT_OLD_AUTOPWM,   /* may need to overwrite */
260         },
261         [it8716] = {
262                 .name = "it8716",
263                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET,
264         },
265         [it8718] = {
266                 .name = "it8718",
267                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
268                   | FEAT_TEMP_OLD_PECI,
269                 .old_peci_mask = 0x4,
270         },
271         [it8720] = {
272                 .name = "it8720",
273                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
274                   | FEAT_TEMP_OLD_PECI,
275                 .old_peci_mask = 0x4,
276         },
277         [it8721] = {
278                 .name = "it8721",
279                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
280                   | FEAT_TEMP_OFFSET | FEAT_TEMP_OLD_PECI | FEAT_TEMP_PECI,
281                 .peci_mask = 0x05,
282                 .old_peci_mask = 0x02,  /* Actually reports PCH */
283         },
284         [it8728] = {
285                 .name = "it8728",
286                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
287                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
288                 .peci_mask = 0x07,
289         },
290         [it8771] = {
291                 .name = "it8771",
292                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
293                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
294                                         /* PECI: guesswork */
295                                         /* 12mV ADC (OHM) */
296                                         /* 16 bit fans (OHM) */
297                 .peci_mask = 0x07,
298         },
299         [it8772] = {
300                 .name = "it8772",
301                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
302                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
303                                         /* PECI (coreboot) */
304                                         /* 12mV ADC (HWSensors4, OHM) */
305                                         /* 16 bit fans (HWSensors4, OHM) */
306                 .peci_mask = 0x07,
307         },
308         [it8782] = {
309                 .name = "it8782",
310                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
311                   | FEAT_TEMP_OLD_PECI,
312                 .old_peci_mask = 0x4,
313         },
314         [it8783] = {
315                 .name = "it8783",
316                 .features = FEAT_16BIT_FANS | FEAT_TEMP_OFFSET
317                   | FEAT_TEMP_OLD_PECI,
318                 .old_peci_mask = 0x4,
319         },
320         [it8603] = {
321                 .name = "it8603",
322                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
323                   | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI,
324                 .peci_mask = 0x07,
325         },
326 };
327 
328 #define has_16bit_fans(data)    ((data)->features & FEAT_16BIT_FANS)
329 #define has_12mv_adc(data)      ((data)->features & FEAT_12MV_ADC)
330 #define has_newer_autopwm(data) ((data)->features & FEAT_NEWER_AUTOPWM)
331 #define has_old_autopwm(data)   ((data)->features & FEAT_OLD_AUTOPWM)
332 #define has_temp_offset(data)   ((data)->features & FEAT_TEMP_OFFSET)
333 #define has_temp_peci(data, nr) (((data)->features & FEAT_TEMP_PECI) && \
334                                  ((data)->peci_mask & (1 << nr)))
335 #define has_temp_old_peci(data, nr) \
336                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
337                                  ((data)->old_peci_mask & (1 << nr)))
338 
339 struct it87_sio_data {
340         enum chips type;
341         /* Values read from Super-I/O config space */
342         u8 revision;
343         u8 vid_value;
344         u8 beep_pin;
345         u8 internal;    /* Internal sensors can be labeled */
346         /* Features skipped based on config or DMI */
347         u16 skip_in;
348         u8 skip_vid;
349         u8 skip_fan;
350         u8 skip_pwm;
351         u8 skip_temp;
352 };
353 
354 /*
355  * For each registered chip, we need to keep some data in memory.
356  * The structure is dynamically allocated.
357  */
358 struct it87_data {
359         struct device *hwmon_dev;
360         enum chips type;
361         u16 features;
362         u8 peci_mask;
363         u8 old_peci_mask;
364 
365         unsigned short addr;
366         const char *name;
367         struct mutex update_lock;
368         char valid;             /* !=0 if following fields are valid */
369         unsigned long last_updated;     /* In jiffies */
370 
371         u16 in_scaled;          /* Internal voltage sensors are scaled */
372         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
373         u8 has_fan;             /* Bitfield, fans enabled */
374         u16 fan[5][2];          /* Register values, [nr][0]=fan, [1]=min */
375         u8 has_temp;            /* Bitfield, temp sensors enabled */
376         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
377         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
378         u8 extra;               /* Register value (IT87_REG_TEMP_EXTRA) */
379         u8 fan_div[3];          /* Register encoding, shifted right */
380         u8 vid;                 /* Register encoding, combined */
381         u8 vrm;
382         u32 alarms;             /* Register encoding, combined */
383         u8 beeps;               /* Register encoding */
384         u8 fan_main_ctrl;       /* Register value */
385         u8 fan_ctl;             /* Register value */
386 
387         /*
388          * The following 3 arrays correspond to the same registers up to
389          * the IT8720F. The meaning of bits 6-0 depends on the value of bit
390          * 7, and we want to preserve settings on mode changes, so we have
391          * to track all values separately.
392          * Starting with the IT8721F, the manual PWM duty cycles are stored
393          * in separate registers (8-bit values), so the separate tracking
394          * is no longer needed, but it is still done to keep the driver
395          * simple.
396          */
397         u8 pwm_ctrl[3];         /* Register value */
398         u8 pwm_duty[3];         /* Manual PWM value set by user */
399         u8 pwm_temp_map[3];     /* PWM to temp. chan. mapping (bits 1-0) */
400 
401         /* Automatic fan speed control registers */
402         u8 auto_pwm[3][4];      /* [nr][3] is hard-coded */
403         s8 auto_temp[3][5];     /* [nr][0] is point1_temp_hyst */
404 };
405 
406 static int adc_lsb(const struct it87_data *data, int nr)
407 {
408         int lsb = has_12mv_adc(data) ? 12 : 16;
409         if (data->in_scaled & (1 << nr))
410                 lsb <<= 1;
411         return lsb;
412 }
413 
414 static u8 in_to_reg(const struct it87_data *data, int nr, long val)
415 {
416         val = DIV_ROUND_CLOSEST(val, adc_lsb(data, nr));
417         return clamp_val(val, 0, 255);
418 }
419 
420 static int in_from_reg(const struct it87_data *data, int nr, int val)
421 {
422         return val * adc_lsb(data, nr);
423 }
424 
425 static inline u8 FAN_TO_REG(long rpm, int div)
426 {
427         if (rpm == 0)
428                 return 255;
429         rpm = clamp_val(rpm, 1, 1000000);
430         return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
431 }
432 
433 static inline u16 FAN16_TO_REG(long rpm)
434 {
435         if (rpm == 0)
436                 return 0xffff;
437         return clamp_val((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
438 }
439 
440 #define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : (val) == 255 ? 0 : \
441                                 1350000 / ((val) * (div)))
442 /* The divider is fixed to 2 in 16-bit mode */
443 #define FAN16_FROM_REG(val) ((val) == 0 ? -1 : (val) == 0xffff ? 0 : \
444                              1350000 / ((val) * 2))
445 
446 #define TEMP_TO_REG(val) (clamp_val(((val) < 0 ? (((val) - 500) / 1000) : \
447                                     ((val) + 500) / 1000), -128, 127))
448 #define TEMP_FROM_REG(val) ((val) * 1000)
449 
450 static u8 pwm_to_reg(const struct it87_data *data, long val)
451 {
452         if (has_newer_autopwm(data))
453                 return val;
454         else
455                 return val >> 1;
456 }
457 
458 static int pwm_from_reg(const struct it87_data *data, u8 reg)
459 {
460         if (has_newer_autopwm(data))
461                 return reg;
462         else
463                 return (reg & 0x7f) << 1;
464 }
465 
466 
467 static int DIV_TO_REG(int val)
468 {
469         int answer = 0;
470         while (answer < 7 && (val >>= 1))
471                 answer++;
472         return answer;
473 }
474 #define DIV_FROM_REG(val) (1 << (val))
475 
476 static const unsigned int pwm_freq[8] = {
477         48000000 / 128,
478         24000000 / 128,
479         12000000 / 128,
480         8000000 / 128,
481         6000000 / 128,
482         3000000 / 128,
483         1500000 / 128,
484         750000 / 128,
485 };
486 
487 static int it87_probe(struct platform_device *pdev);
488 static int it87_remove(struct platform_device *pdev);
489 
490 static int it87_read_value(struct it87_data *data, u8 reg);
491 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
492 static struct it87_data *it87_update_device(struct device *dev);
493 static int it87_check_pwm(struct device *dev);
494 static void it87_init_device(struct platform_device *pdev);
495 
496 
497 static struct platform_driver it87_driver = {
498         .driver = {
499                 .owner  = THIS_MODULE,
500                 .name   = DRVNAME,
501         },
502         .probe  = it87_probe,
503         .remove = it87_remove,
504 };
505 
506 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
507                        char *buf)
508 {
509         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
510         int nr = sattr->nr;
511         int index = sattr->index;
512 
513         struct it87_data *data = it87_update_device(dev);
514         return sprintf(buf, "%d\n", in_from_reg(data, nr, data->in[nr][index]));
515 }
516 
517 static ssize_t set_in(struct device *dev, struct device_attribute *attr,
518                       const char *buf, size_t count)
519 {
520         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
521         int nr = sattr->nr;
522         int index = sattr->index;
523 
524         struct it87_data *data = dev_get_drvdata(dev);
525         unsigned long val;
526 
527         if (kstrtoul(buf, 10, &val) < 0)
528                 return -EINVAL;
529 
530         mutex_lock(&data->update_lock);
531         data->in[nr][index] = in_to_reg(data, nr, val);
532         it87_write_value(data,
533                          index == 1 ? IT87_REG_VIN_MIN(nr)
534                                     : IT87_REG_VIN_MAX(nr),
535                          data->in[nr][index]);
536         mutex_unlock(&data->update_lock);
537         return count;
538 }
539 
540 static SENSOR_DEVICE_ATTR_2(in0_input, S_IRUGO, show_in, NULL, 0, 0);
541 static SENSOR_DEVICE_ATTR_2(in0_min, S_IRUGO | S_IWUSR, show_in, set_in,
542                             0, 1);
543 static SENSOR_DEVICE_ATTR_2(in0_max, S_IRUGO | S_IWUSR, show_in, set_in,
544                             0, 2);
545 
546 static SENSOR_DEVICE_ATTR_2(in1_input, S_IRUGO, show_in, NULL, 1, 0);
547 static SENSOR_DEVICE_ATTR_2(in1_min, S_IRUGO | S_IWUSR, show_in, set_in,
548                             1, 1);
549 static SENSOR_DEVICE_ATTR_2(in1_max, S_IRUGO | S_IWUSR, show_in, set_in,
550                             1, 2);
551 
552 static SENSOR_DEVICE_ATTR_2(in2_input, S_IRUGO, show_in, NULL, 2, 0);
553 static SENSOR_DEVICE_ATTR_2(in2_min, S_IRUGO | S_IWUSR, show_in, set_in,
554                             2, 1);
555 static SENSOR_DEVICE_ATTR_2(in2_max, S_IRUGO | S_IWUSR, show_in, set_in,
556                             2, 2);
557 
558 static SENSOR_DEVICE_ATTR_2(in3_input, S_IRUGO, show_in, NULL, 3, 0);
559 static SENSOR_DEVICE_ATTR_2(in3_min, S_IRUGO | S_IWUSR, show_in, set_in,
560                             3, 1);
561 static SENSOR_DEVICE_ATTR_2(in3_max, S_IRUGO | S_IWUSR, show_in, set_in,
562                             3, 2);
563 
564 static SENSOR_DEVICE_ATTR_2(in4_input, S_IRUGO, show_in, NULL, 4, 0);
565 static SENSOR_DEVICE_ATTR_2(in4_min, S_IRUGO | S_IWUSR, show_in, set_in,
566                             4, 1);
567 static SENSOR_DEVICE_ATTR_2(in4_max, S_IRUGO | S_IWUSR, show_in, set_in,
568                             4, 2);
569 
570 static SENSOR_DEVICE_ATTR_2(in5_input, S_IRUGO, show_in, NULL, 5, 0);
571 static SENSOR_DEVICE_ATTR_2(in5_min, S_IRUGO | S_IWUSR, show_in, set_in,
572                             5, 1);
573 static SENSOR_DEVICE_ATTR_2(in5_max, S_IRUGO | S_IWUSR, show_in, set_in,
574                             5, 2);
575 
576 static SENSOR_DEVICE_ATTR_2(in6_input, S_IRUGO, show_in, NULL, 6, 0);
577 static SENSOR_DEVICE_ATTR_2(in6_min, S_IRUGO | S_IWUSR, show_in, set_in,
578                             6, 1);
579 static SENSOR_DEVICE_ATTR_2(in6_max, S_IRUGO | S_IWUSR, show_in, set_in,
580                             6, 2);
581 
582 static SENSOR_DEVICE_ATTR_2(in7_input, S_IRUGO, show_in, NULL, 7, 0);
583 static SENSOR_DEVICE_ATTR_2(in7_min, S_IRUGO | S_IWUSR, show_in, set_in,
584                             7, 1);
585 static SENSOR_DEVICE_ATTR_2(in7_max, S_IRUGO | S_IWUSR, show_in, set_in,
586                             7, 2);
587 
588 static SENSOR_DEVICE_ATTR_2(in8_input, S_IRUGO, show_in, NULL, 8, 0);
589 static SENSOR_DEVICE_ATTR_2(in9_input, S_IRUGO, show_in, NULL, 9, 0);
590 
591 /* 3 temperatures */
592 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
593                          char *buf)
594 {
595         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
596         int nr = sattr->nr;
597         int index = sattr->index;
598         struct it87_data *data = it87_update_device(dev);
599 
600         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr][index]));
601 }
602 
603 static ssize_t set_temp(struct device *dev, struct device_attribute *attr,
604                         const char *buf, size_t count)
605 {
606         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
607         int nr = sattr->nr;
608         int index = sattr->index;
609         struct it87_data *data = dev_get_drvdata(dev);
610         long val;
611         u8 reg, regval;
612 
613         if (kstrtol(buf, 10, &val) < 0)
614                 return -EINVAL;
615 
616         mutex_lock(&data->update_lock);
617 
618         switch (index) {
619         default:
620         case 1:
621                 reg = IT87_REG_TEMP_LOW(nr);
622                 break;
623         case 2:
624                 reg = IT87_REG_TEMP_HIGH(nr);
625                 break;
626         case 3:
627                 regval = it87_read_value(data, IT87_REG_BEEP_ENABLE);
628                 if (!(regval & 0x80)) {
629                         regval |= 0x80;
630                         it87_write_value(data, IT87_REG_BEEP_ENABLE, regval);
631                 }
632                 data->valid = 0;
633                 reg = IT87_REG_TEMP_OFFSET[nr];
634                 break;
635         }
636 
637         data->temp[nr][index] = TEMP_TO_REG(val);
638         it87_write_value(data, reg, data->temp[nr][index]);
639         mutex_unlock(&data->update_lock);
640         return count;
641 }
642 
643 static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
644 static SENSOR_DEVICE_ATTR_2(temp1_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
645                             0, 1);
646 static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
647                             0, 2);
648 static SENSOR_DEVICE_ATTR_2(temp1_offset, S_IRUGO | S_IWUSR, show_temp,
649                             set_temp, 0, 3);
650 static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 1, 0);
651 static SENSOR_DEVICE_ATTR_2(temp2_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
652                             1, 1);
653 static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
654                             1, 2);
655 static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IRUGO | S_IWUSR, show_temp,
656                             set_temp, 1, 3);
657 static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 2, 0);
658 static SENSOR_DEVICE_ATTR_2(temp3_min, S_IRUGO | S_IWUSR, show_temp, set_temp,
659                             2, 1);
660 static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
661                             2, 2);
662 static SENSOR_DEVICE_ATTR_2(temp3_offset, S_IRUGO | S_IWUSR, show_temp,
663                             set_temp, 2, 3);
664 
665 static ssize_t show_temp_type(struct device *dev, struct device_attribute *attr,
666                               char *buf)
667 {
668         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
669         int nr = sensor_attr->index;
670         struct it87_data *data = it87_update_device(dev);
671         u8 reg = data->sensor;      /* In case value is updated while used */
672         u8 extra = data->extra;
673 
674         if ((has_temp_peci(data, nr) && (reg >> 6 == nr + 1))
675             || (has_temp_old_peci(data, nr) && (extra & 0x80)))
676                 return sprintf(buf, "6\n");  /* Intel PECI */
677         if (reg & (1 << nr))
678                 return sprintf(buf, "3\n");  /* thermal diode */
679         if (reg & (8 << nr))
680                 return sprintf(buf, "4\n");  /* thermistor */
681         return sprintf(buf, "\n");      /* disabled */
682 }
683 
684 static ssize_t set_temp_type(struct device *dev, struct device_attribute *attr,
685                              const char *buf, size_t count)
686 {
687         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
688         int nr = sensor_attr->index;
689 
690         struct it87_data *data = dev_get_drvdata(dev);
691         long val;
692         u8 reg, extra;
693 
694         if (kstrtol(buf, 10, &val) < 0)
695                 return -EINVAL;
696 
697         reg = it87_read_value(data, IT87_REG_TEMP_ENABLE);
698         reg &= ~(1 << nr);
699         reg &= ~(8 << nr);
700         if (has_temp_peci(data, nr) && (reg >> 6 == nr + 1 || val == 6))
701                 reg &= 0x3f;
702         extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
703         if (has_temp_old_peci(data, nr) && ((extra & 0x80) || val == 6))
704                 extra &= 0x7f;
705         if (val == 2) { /* backwards compatibility */
706                 dev_warn(dev,
707                          "Sensor type 2 is deprecated, please use 4 instead\n");
708                 val = 4;
709         }
710         /* 3 = thermal diode; 4 = thermistor; 6 = Intel PECI; 0 = disabled */
711         if (val == 3)
712                 reg |= 1 << nr;
713         else if (val == 4)
714                 reg |= 8 << nr;
715         else if (has_temp_peci(data, nr) && val == 6)
716                 reg |= (nr + 1) << 6;
717         else if (has_temp_old_peci(data, nr) && val == 6)
718                 extra |= 0x80;
719         else if (val != 0)
720                 return -EINVAL;
721 
722         mutex_lock(&data->update_lock);
723         data->sensor = reg;
724         data->extra = extra;
725         it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
726         if (has_temp_old_peci(data, nr))
727                 it87_write_value(data, IT87_REG_TEMP_EXTRA, data->extra);
728         data->valid = 0;        /* Force cache refresh */
729         mutex_unlock(&data->update_lock);
730         return count;
731 }
732 
733 static SENSOR_DEVICE_ATTR(temp1_type, S_IRUGO | S_IWUSR, show_temp_type,
734                           set_temp_type, 0);
735 static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, show_temp_type,
736                           set_temp_type, 1);
737 static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_temp_type,
738                           set_temp_type, 2);
739 
740 /* 3 Fans */
741 
742 static int pwm_mode(const struct it87_data *data, int nr)
743 {
744         int ctrl = data->fan_main_ctrl & (1 << nr);
745 
746         if (ctrl == 0 && data->type != it8603)          /* Full speed */
747                 return 0;
748         if (data->pwm_ctrl[nr] & 0x80)                  /* Automatic mode */
749                 return 2;
750         else                                            /* Manual mode */
751                 return 1;
752 }
753 
754 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
755                         char *buf)
756 {
757         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
758         int nr = sattr->nr;
759         int index = sattr->index;
760         int speed;
761         struct it87_data *data = it87_update_device(dev);
762 
763         speed = has_16bit_fans(data) ?
764                 FAN16_FROM_REG(data->fan[nr][index]) :
765                 FAN_FROM_REG(data->fan[nr][index],
766                              DIV_FROM_REG(data->fan_div[nr]));
767         return sprintf(buf, "%d\n", speed);
768 }
769 
770 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
771                 char *buf)
772 {
773         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
774         int nr = sensor_attr->index;
775 
776         struct it87_data *data = it87_update_device(dev);
777         return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
778 }
779 static ssize_t show_pwm_enable(struct device *dev,
780                 struct device_attribute *attr, char *buf)
781 {
782         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
783         int nr = sensor_attr->index;
784 
785         struct it87_data *data = it87_update_device(dev);
786         return sprintf(buf, "%d\n", pwm_mode(data, nr));
787 }
788 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
789                 char *buf)
790 {
791         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
792         int nr = sensor_attr->index;
793 
794         struct it87_data *data = it87_update_device(dev);
795         return sprintf(buf, "%d\n",
796                        pwm_from_reg(data, data->pwm_duty[nr]));
797 }
798 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
799                 char *buf)
800 {
801         struct it87_data *data = it87_update_device(dev);
802         int index = (data->fan_ctl >> 4) & 0x07;
803 
804         return sprintf(buf, "%u\n", pwm_freq[index]);
805 }
806 
807 static ssize_t set_fan(struct device *dev, struct device_attribute *attr,
808                        const char *buf, size_t count)
809 {
810         struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
811         int nr = sattr->nr;
812         int index = sattr->index;
813 
814         struct it87_data *data = dev_get_drvdata(dev);
815         long val;
816         u8 reg;
817 
818         if (kstrtol(buf, 10, &val) < 0)
819                 return -EINVAL;
820 
821         mutex_lock(&data->update_lock);
822 
823         if (has_16bit_fans(data)) {
824                 data->fan[nr][index] = FAN16_TO_REG(val);
825                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
826                                  data->fan[nr][index] & 0xff);
827                 it87_write_value(data, IT87_REG_FANX_MIN[nr],
828                                  data->fan[nr][index] >> 8);
829         } else {
830                 reg = it87_read_value(data, IT87_REG_FAN_DIV);
831                 switch (nr) {
832                 case 0:
833                         data->fan_div[nr] = reg & 0x07;
834                         break;
835                 case 1:
836                         data->fan_div[nr] = (reg >> 3) & 0x07;
837                         break;
838                 case 2:
839                         data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
840                         break;
841                 }
842                 data->fan[nr][index] =
843                   FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
844                 it87_write_value(data, IT87_REG_FAN_MIN[nr],
845                                  data->fan[nr][index]);
846         }
847 
848         mutex_unlock(&data->update_lock);
849         return count;
850 }
851 
852 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
853                 const char *buf, size_t count)
854 {
855         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
856         int nr = sensor_attr->index;
857 
858         struct it87_data *data = dev_get_drvdata(dev);
859         unsigned long val;
860         int min;
861         u8 old;
862 
863         if (kstrtoul(buf, 10, &val) < 0)
864                 return -EINVAL;
865 
866         mutex_lock(&data->update_lock);
867         old = it87_read_value(data, IT87_REG_FAN_DIV);
868 
869         /* Save fan min limit */
870         min = FAN_FROM_REG(data->fan[nr][1], DIV_FROM_REG(data->fan_div[nr]));
871 
872         switch (nr) {
873         case 0:
874         case 1:
875                 data->fan_div[nr] = DIV_TO_REG(val);
876                 break;
877         case 2:
878                 if (val < 8)
879                         data->fan_div[nr] = 1;
880                 else
881                         data->fan_div[nr] = 3;
882         }
883         val = old & 0x80;
884         val |= (data->fan_div[0] & 0x07);
885         val |= (data->fan_div[1] & 0x07) << 3;
886         if (data->fan_div[2] == 3)
887                 val |= 0x1 << 6;
888         it87_write_value(data, IT87_REG_FAN_DIV, val);
889 
890         /* Restore fan min limit */
891         data->fan[nr][1] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
892         it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan[nr][1]);
893 
894         mutex_unlock(&data->update_lock);
895         return count;
896 }
897 
898 /* Returns 0 if OK, -EINVAL otherwise */
899 static int check_trip_points(struct device *dev, int nr)
900 {
901         const struct it87_data *data = dev_get_drvdata(dev);
902         int i, err = 0;
903 
904         if (has_old_autopwm(data)) {
905                 for (i = 0; i < 3; i++) {
906                         if (data->auto_temp[nr][i] > data->auto_temp[nr][i + 1])
907                                 err = -EINVAL;
908                 }
909                 for (i = 0; i < 2; i++) {
910                         if (data->auto_pwm[nr][i] > data->auto_pwm[nr][i + 1])
911                                 err = -EINVAL;
912                 }
913         }
914 
915         if (err) {
916                 dev_err(dev,
917                         "Inconsistent trip points, not switching to automatic mode\n");
918                 dev_err(dev, "Adjust the trip points and try again\n");
919         }
920         return err;
921 }
922 
923 static ssize_t set_pwm_enable(struct device *dev,
924                 struct device_attribute *attr, const char *buf, size_t count)
925 {
926         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
927         int nr = sensor_attr->index;
928 
929         struct it87_data *data = dev_get_drvdata(dev);
930         long val;
931 
932         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 2)
933                 return -EINVAL;
934 
935         /* Check trip points before switching to automatic mode */
936         if (val == 2) {
937                 if (check_trip_points(dev, nr) < 0)
938                         return -EINVAL;
939         }
940 
941         /* IT8603E does not have on/off mode */
942         if (val == 0 && data->type == it8603)
943                 return -EINVAL;
944 
945         mutex_lock(&data->update_lock);
946 
947         if (val == 0) {
948                 int tmp;
949                 /* make sure the fan is on when in on/off mode */
950                 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
951                 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
952                 /* set on/off mode */
953                 data->fan_main_ctrl &= ~(1 << nr);
954                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
955                                  data->fan_main_ctrl);
956         } else {
957                 if (val == 1)                           /* Manual mode */
958                         data->pwm_ctrl[nr] = has_newer_autopwm(data) ?
959                                              data->pwm_temp_map[nr] :
960                                              data->pwm_duty[nr];
961                 else                                    /* Automatic mode */
962                         data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
963                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
964 
965                 if (data->type != it8603) {
966                         /* set SmartGuardian mode */
967                         data->fan_main_ctrl |= (1 << nr);
968                         it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
969                                          data->fan_main_ctrl);
970                 }
971         }
972 
973         mutex_unlock(&data->update_lock);
974         return count;
975 }
976 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
977                 const char *buf, size_t count)
978 {
979         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
980         int nr = sensor_attr->index;
981 
982         struct it87_data *data = dev_get_drvdata(dev);
983         long val;
984 
985         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
986                 return -EINVAL;
987 
988         mutex_lock(&data->update_lock);
989         if (has_newer_autopwm(data)) {
990                 /*
991                  * If we are in automatic mode, the PWM duty cycle register
992                  * is read-only so we can't write the value.
993                  */
994                 if (data->pwm_ctrl[nr] & 0x80) {
995                         mutex_unlock(&data->update_lock);
996                         return -EBUSY;
997                 }
998                 data->pwm_duty[nr] = pwm_to_reg(data, val);
999                 it87_write_value(data, IT87_REG_PWM_DUTY(nr),
1000                                  data->pwm_duty[nr]);
1001         } else {
1002                 data->pwm_duty[nr] = pwm_to_reg(data, val);
1003                 /*
1004                  * If we are in manual mode, write the duty cycle immediately;
1005                  * otherwise, just store it for later use.
1006                  */
1007                 if (!(data->pwm_ctrl[nr] & 0x80)) {
1008                         data->pwm_ctrl[nr] = data->pwm_duty[nr];
1009                         it87_write_value(data, IT87_REG_PWM(nr),
1010                                          data->pwm_ctrl[nr]);
1011                 }
1012         }
1013         mutex_unlock(&data->update_lock);
1014         return count;
1015 }
1016 static ssize_t set_pwm_freq(struct device *dev,
1017                 struct device_attribute *attr, const char *buf, size_t count)
1018 {
1019         struct it87_data *data = dev_get_drvdata(dev);
1020         unsigned long val;
1021         int i;
1022 
1023         if (kstrtoul(buf, 10, &val) < 0)
1024                 return -EINVAL;
1025 
1026         /* Search for the nearest available frequency */
1027         for (i = 0; i < 7; i++) {
1028                 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
1029                         break;
1030         }
1031 
1032         mutex_lock(&data->update_lock);
1033         data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
1034         data->fan_ctl |= i << 4;
1035         it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
1036         mutex_unlock(&data->update_lock);
1037 
1038         return count;
1039 }
1040 static ssize_t show_pwm_temp_map(struct device *dev,
1041                 struct device_attribute *attr, char *buf)
1042 {
1043         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1044         int nr = sensor_attr->index;
1045 
1046         struct it87_data *data = it87_update_device(dev);
1047         int map;
1048 
1049         if (data->pwm_temp_map[nr] < 3)
1050                 map = 1 << data->pwm_temp_map[nr];
1051         else
1052                 map = 0;                        /* Should never happen */
1053         return sprintf(buf, "%d\n", map);
1054 }
1055 static ssize_t set_pwm_temp_map(struct device *dev,
1056                 struct device_attribute *attr, const char *buf, size_t count)
1057 {
1058         struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1059         int nr = sensor_attr->index;
1060 
1061         struct it87_data *data = dev_get_drvdata(dev);
1062         long val;
1063         u8 reg;
1064 
1065         /*
1066          * This check can go away if we ever support automatic fan speed
1067          * control on newer chips.
1068          */
1069         if (!has_old_autopwm(data)) {
1070                 dev_notice(dev, "Mapping change disabled for safety reasons\n");
1071                 return -EINVAL;
1072         }
1073 
1074         if (kstrtol(buf, 10, &val) < 0)
1075                 return -EINVAL;
1076 
1077         switch (val) {
1078         case (1 << 0):
1079                 reg = 0x00;
1080                 break;
1081         case (1 << 1):
1082                 reg = 0x01;
1083                 break;
1084         case (1 << 2):
1085                 reg = 0x02;
1086                 break;
1087         default:
1088                 return -EINVAL;
1089         }
1090 
1091         mutex_lock(&data->update_lock);
1092         data->pwm_temp_map[nr] = reg;
1093         /*
1094          * If we are in automatic mode, write the temp mapping immediately;
1095          * otherwise, just store it for later use.
1096          */
1097         if (data->pwm_ctrl[nr] & 0x80) {
1098                 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
1099                 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
1100         }
1101         mutex_unlock(&data->update_lock);
1102         return count;
1103 }
1104 
1105 static ssize_t show_auto_pwm(struct device *dev,
1106                 struct device_attribute *attr, char *buf)
1107 {
1108         struct it87_data *data = it87_update_device(dev);
1109         struct sensor_device_attribute_2 *sensor_attr =
1110                         to_sensor_dev_attr_2(attr);
1111         int nr = sensor_attr->nr;
1112         int point = sensor_attr->index;
1113 
1114         return sprintf(buf, "%d\n",
1115                        pwm_from_reg(data, data->auto_pwm[nr][point]));
1116 }
1117 
1118 static ssize_t set_auto_pwm(struct device *dev,
1119                 struct device_attribute *attr, const char *buf, size_t count)
1120 {
1121         struct it87_data *data = dev_get_drvdata(dev);
1122         struct sensor_device_attribute_2 *sensor_attr =
1123                         to_sensor_dev_attr_2(attr);
1124         int nr = sensor_attr->nr;
1125         int point = sensor_attr->index;
1126         long val;
1127 
1128         if (kstrtol(buf, 10, &val) < 0 || val < 0 || val > 255)
1129                 return -EINVAL;
1130 
1131         mutex_lock(&data->update_lock);
1132         data->auto_pwm[nr][point] = pwm_to_reg(data, val);
1133         it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
1134                          data->auto_pwm[nr][point]);
1135         mutex_unlock(&data->update_lock);
1136         return count;
1137 }
1138 
1139 static ssize_t show_auto_temp(struct device *dev,
1140                 struct device_attribute *attr, char *buf)
1141 {
1142         struct it87_data *data = it87_update_device(dev);
1143         struct sensor_device_attribute_2 *sensor_attr =
1144                         to_sensor_dev_attr_2(attr);
1145         int nr = sensor_attr->nr;
1146         int point = sensor_attr->index;
1147 
1148         return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
1149 }
1150 
1151 static ssize_t set_auto_temp(struct device *dev,
1152                 struct device_attribute *attr, const char *buf, size_t count)
1153 {
1154         struct it87_data *data = dev_get_drvdata(dev);
1155         struct sensor_device_attribute_2 *sensor_attr =
1156                         to_sensor_dev_attr_2(attr);
1157         int nr = sensor_attr->nr;
1158         int point = sensor_attr->index;
1159         long val;
1160 
1161         if (kstrtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
1162                 return -EINVAL;
1163 
1164         mutex_lock(&data->update_lock);
1165         data->auto_temp[nr][point] = TEMP_TO_REG(val);
1166         it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
1167                          data->auto_temp[nr][point]);
1168         mutex_unlock(&data->update_lock);
1169         return count;
1170 }
1171 
1172 static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_fan, NULL, 0, 0);
1173 static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1174                             0, 1);
1175 static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR, show_fan_div,
1176                           set_fan_div, 0);
1177 
1178 static SENSOR_DEVICE_ATTR_2(fan2_input, S_IRUGO, show_fan, NULL, 1, 0);
1179 static SENSOR_DEVICE_ATTR_2(fan2_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1180                             1, 1);
1181 static SENSOR_DEVICE_ATTR(fan2_div, S_IRUGO | S_IWUSR, show_fan_div,
1182                           set_fan_div, 1);
1183 
1184 static SENSOR_DEVICE_ATTR_2(fan3_input, S_IRUGO, show_fan, NULL, 2, 0);
1185 static SENSOR_DEVICE_ATTR_2(fan3_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1186                             2, 1);
1187 static SENSOR_DEVICE_ATTR(fan3_div, S_IRUGO | S_IWUSR, show_fan_div,
1188                           set_fan_div, 2);
1189 
1190 static SENSOR_DEVICE_ATTR_2(fan4_input, S_IRUGO, show_fan, NULL, 3, 0);
1191 static SENSOR_DEVICE_ATTR_2(fan4_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1192                             3, 1);
1193 
1194 static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
1195 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
1196                             4, 1);
1197 
1198 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1199                           show_pwm_enable, set_pwm_enable, 0);
1200 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
1201 static DEVICE_ATTR(pwm1_freq, S_IRUGO | S_IWUSR, show_pwm_freq, set_pwm_freq);
1202 static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO | S_IWUSR,
1203                           show_pwm_temp_map, set_pwm_temp_map, 0);
1204 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
1205                             show_auto_pwm, set_auto_pwm, 0, 0);
1206 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
1207                             show_auto_pwm, set_auto_pwm, 0, 1);
1208 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
1209                             show_auto_pwm, set_auto_pwm, 0, 2);
1210 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_pwm, S_IRUGO,
1211                             show_auto_pwm, NULL, 0, 3);
1212 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
1213                             show_auto_temp, set_auto_temp, 0, 1);
1214 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1215                             show_auto_temp, set_auto_temp, 0, 0);
1216 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
1217                             show_auto_temp, set_auto_temp, 0, 2);
1218 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
1219                             show_auto_temp, set_auto_temp, 0, 3);
1220 static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
1221                             show_auto_temp, set_auto_temp, 0, 4);
1222 
1223 static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR,
1224                           show_pwm_enable, set_pwm_enable, 1);
1225 static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
1226 static DEVICE_ATTR(pwm2_freq, S_IRUGO, show_pwm_freq, NULL);
1227 static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IRUGO | S_IWUSR,
1228                           show_pwm_temp_map, set_pwm_temp_map, 1);
1229 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
1230                             show_auto_pwm, set_auto_pwm, 1, 0);
1231 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
1232                             show_auto_pwm, set_auto_pwm, 1, 1);
1233 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
1234                             show_auto_pwm, set_auto_pwm, 1, 2);
1235 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_pwm, S_IRUGO,
1236                             show_auto_pwm, NULL, 1, 3);
1237 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
1238                             show_auto_temp, set_auto_temp, 1, 1);
1239 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1240                             show_auto_temp, set_auto_temp, 1, 0);
1241 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
1242                             show_auto_temp, set_auto_temp, 1, 2);
1243 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
1244                             show_auto_temp, set_auto_temp, 1, 3);
1245 static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
1246                             show_auto_temp, set_auto_temp, 1, 4);
1247 
1248 static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR,
1249                           show_pwm_enable, set_pwm_enable, 2);
1250 static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 2);
1251 static DEVICE_ATTR(pwm3_freq, S_IRUGO, show_pwm_freq, NULL);
1252 static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IRUGO | S_IWUSR,
1253                           show_pwm_temp_map, set_pwm_temp_map, 2);
1254 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
1255                             show_auto_pwm, set_auto_pwm, 2, 0);
1256 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
1257                             show_auto_pwm, set_auto_pwm, 2, 1);
1258 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
1259                             show_auto_pwm, set_auto_pwm, 2, 2);
1260 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_pwm, S_IRUGO,
1261                             show_auto_pwm, NULL, 2, 3);
1262 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
1263                             show_auto_temp, set_auto_temp, 2, 1);
1264 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp_hyst, S_IRUGO | S_IWUSR,
1265                             show_auto_temp, set_auto_temp, 2, 0);
1266 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
1267                             show_auto_temp, set_auto_temp, 2, 2);
1268 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
1269                             show_auto_temp, set_auto_temp, 2, 3);
1270 static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
1271                             show_auto_temp, set_auto_temp, 2, 4);
1272 
1273 /* Alarms */
1274 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1275                 char *buf)
1276 {
1277         struct it87_data *data = it87_update_device(dev);
1278         return sprintf(buf, "%u\n", data->alarms);
1279 }
1280 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1281 
1282 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1283                 char *buf)
1284 {
1285         int bitnr = to_sensor_dev_attr(attr)->index;
1286         struct it87_data *data = it87_update_device(dev);
1287         return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1288 }
1289 
1290 static ssize_t clear_intrusion(struct device *dev, struct device_attribute
1291                 *attr, const char *buf, size_t count)
1292 {
1293         struct it87_data *data = dev_get_drvdata(dev);
1294         long val;
1295         int config;
1296 
1297         if (kstrtol(buf, 10, &val) < 0 || val != 0)
1298                 return -EINVAL;
1299 
1300         mutex_lock(&data->update_lock);
1301         config = it87_read_value(data, IT87_REG_CONFIG);
1302         if (config < 0) {
1303                 count = config;
1304         } else {
1305                 config |= 1 << 5;
1306                 it87_write_value(data, IT87_REG_CONFIG, config);
1307                 /* Invalidate cache to force re-read */
1308                 data->valid = 0;
1309         }
1310         mutex_unlock(&data->update_lock);
1311 
1312         return count;
1313 }
1314 
1315 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1316 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1317 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1318 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1319 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1320 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1321 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1322 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1323 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1324 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1325 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1326 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1327 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1328 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1329 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1330 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1331 static SENSOR_DEVICE_ATTR(intrusion0_alarm, S_IRUGO | S_IWUSR,
1332                           show_alarm, clear_intrusion, 4);
1333 
1334 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1335                 char *buf)
1336 {
1337         int bitnr = to_sensor_dev_attr(attr)->index;
1338         struct it87_data *data = it87_update_device(dev);
1339         return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1340 }
1341 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1342                 const char *buf, size_t count)
1343 {
1344         int bitnr = to_sensor_dev_attr(attr)->index;
1345         struct it87_data *data = dev_get_drvdata(dev);
1346         long val;
1347 
1348         if (kstrtol(buf, 10, &val) < 0
1349          || (val != 0 && val != 1))
1350                 return -EINVAL;
1351 
1352         mutex_lock(&data->update_lock);
1353         data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1354         if (val)
1355                 data->beeps |= (1 << bitnr);
1356         else
1357                 data->beeps &= ~(1 << bitnr);
1358         it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1359         mutex_unlock(&data->update_lock);
1360         return count;
1361 }
1362 
1363 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1364                           show_beep, set_beep, 1);
1365 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1366 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1367 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1368 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1369 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1370 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1371 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1372 /* fanX_beep writability is set later */
1373 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1374 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1375 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1376 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1377 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1378 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1379                           show_beep, set_beep, 2);
1380 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1381 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1382 
1383 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1384                 char *buf)
1385 {
1386         struct it87_data *data = dev_get_drvdata(dev);
1387         return sprintf(buf, "%u\n", data->vrm);
1388 }
1389 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1390                 const char *buf, size_t count)
1391 {
1392         struct it87_data *data = dev_get_drvdata(dev);
1393         unsigned long val;
1394 
1395         if (kstrtoul(buf, 10, &val) < 0)
1396                 return -EINVAL;
1397 
1398         data->vrm = val;
1399 
1400         return count;
1401 }
1402 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1403 
1404 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1405                 char *buf)
1406 {
1407         struct it87_data *data = it87_update_device(dev);
1408         return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1409 }
1410 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1411 
1412 static ssize_t show_label(struct device *dev, struct device_attribute *attr,
1413                 char *buf)
1414 {
1415         static const char * const labels[] = {
1416                 "+5V",
1417                 "5VSB",
1418                 "Vbat",
1419         };
1420         static const char * const labels_it8721[] = {
1421                 "+3.3V",
1422                 "3VSB",
1423                 "Vbat",
1424         };
1425         struct it87_data *data = dev_get_drvdata(dev);
1426         int nr = to_sensor_dev_attr(attr)->index;
1427 
1428         return sprintf(buf, "%s\n", has_12mv_adc(data) ? labels_it8721[nr]
1429                                                        : labels[nr]);
1430 }
1431 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_label, NULL, 0);
1432 static SENSOR_DEVICE_ATTR(in7_label, S_IRUGO, show_label, NULL, 1);
1433 static SENSOR_DEVICE_ATTR(in8_label, S_IRUGO, show_label, NULL, 2);
1434 /* special AVCC3 IT8306E in9 */
1435 static SENSOR_DEVICE_ATTR(in9_label, S_IRUGO, show_label, NULL, 0);
1436 
1437 static ssize_t show_name(struct device *dev, struct device_attribute
1438                          *devattr, char *buf)
1439 {
1440         struct it87_data *data = dev_get_drvdata(dev);
1441         return sprintf(buf, "%s\n", data->name);
1442 }
1443 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1444 
1445 static struct attribute *it87_attributes_in[10][5] = {
1446 {
1447         &sensor_dev_attr_in0_input.dev_attr.attr,
1448         &sensor_dev_attr_in0_min.dev_attr.attr,
1449         &sensor_dev_attr_in0_max.dev_attr.attr,
1450         &sensor_dev_attr_in0_alarm.dev_attr.attr,
1451         NULL
1452 }, {
1453         &sensor_dev_attr_in1_input.dev_attr.attr,
1454         &sensor_dev_attr_in1_min.dev_attr.attr,
1455         &sensor_dev_attr_in1_max.dev_attr.attr,
1456         &sensor_dev_attr_in1_alarm.dev_attr.attr,
1457         NULL
1458 }, {
1459         &sensor_dev_attr_in2_input.dev_attr.attr,
1460         &sensor_dev_attr_in2_min.dev_attr.attr,
1461         &sensor_dev_attr_in2_max.dev_attr.attr,
1462         &sensor_dev_attr_in2_alarm.dev_attr.attr,
1463         NULL
1464 }, {
1465         &sensor_dev_attr_in3_input.dev_attr.attr,
1466         &sensor_dev_attr_in3_min.dev_attr.attr,
1467         &sensor_dev_attr_in3_max.dev_attr.attr,
1468         &sensor_dev_attr_in3_alarm.dev_attr.attr,
1469         NULL
1470 }, {
1471         &sensor_dev_attr_in4_input.dev_attr.attr,
1472         &sensor_dev_attr_in4_min.dev_attr.attr,
1473         &sensor_dev_attr_in4_max.dev_attr.attr,
1474         &sensor_dev_attr_in4_alarm.dev_attr.attr,
1475         NULL
1476 }, {
1477         &sensor_dev_attr_in5_input.dev_attr.attr,
1478         &sensor_dev_attr_in5_min.dev_attr.attr,
1479         &sensor_dev_attr_in5_max.dev_attr.attr,
1480         &sensor_dev_attr_in5_alarm.dev_attr.attr,
1481         NULL
1482 }, {
1483         &sensor_dev_attr_in6_input.dev_attr.attr,
1484         &sensor_dev_attr_in6_min.dev_attr.attr,
1485         &sensor_dev_attr_in6_max.dev_attr.attr,
1486         &sensor_dev_attr_in6_alarm.dev_attr.attr,
1487         NULL
1488 }, {
1489         &sensor_dev_attr_in7_input.dev_attr.attr,
1490         &sensor_dev_attr_in7_min.dev_attr.attr,
1491         &sensor_dev_attr_in7_max.dev_attr.attr,
1492         &sensor_dev_attr_in7_alarm.dev_attr.attr,
1493         NULL
1494 }, {
1495         &sensor_dev_attr_in8_input.dev_attr.attr,
1496         NULL
1497 }, {
1498         &sensor_dev_attr_in9_input.dev_attr.attr,
1499         NULL
1500 } };
1501 
1502 static const struct attribute_group it87_group_in[10] = {
1503         { .attrs = it87_attributes_in[0] },
1504         { .attrs = it87_attributes_in[1] },
1505         { .attrs = it87_attributes_in[2] },
1506         { .attrs = it87_attributes_in[3] },
1507         { .attrs = it87_attributes_in[4] },
1508         { .attrs = it87_attributes_in[5] },
1509         { .attrs = it87_attributes_in[6] },
1510         { .attrs = it87_attributes_in[7] },
1511         { .attrs = it87_attributes_in[8] },
1512         { .attrs = it87_attributes_in[9] },
1513 };
1514 
1515 static struct attribute *it87_attributes_temp[3][6] = {
1516 {
1517         &sensor_dev_attr_temp1_input.dev_attr.attr,
1518         &sensor_dev_attr_temp1_max.dev_attr.attr,
1519         &sensor_dev_attr_temp1_min.dev_attr.attr,
1520         &sensor_dev_attr_temp1_type.dev_attr.attr,
1521         &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1522         NULL
1523 } , {
1524         &sensor_dev_attr_temp2_input.dev_attr.attr,
1525         &sensor_dev_attr_temp2_max.dev_attr.attr,
1526         &sensor_dev_attr_temp2_min.dev_attr.attr,
1527         &sensor_dev_attr_temp2_type.dev_attr.attr,
1528         &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1529         NULL
1530 } , {
1531         &sensor_dev_attr_temp3_input.dev_attr.attr,
1532         &sensor_dev_attr_temp3_max.dev_attr.attr,
1533         &sensor_dev_attr_temp3_min.dev_attr.attr,
1534         &sensor_dev_attr_temp3_type.dev_attr.attr,
1535         &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1536         NULL
1537 } };
1538 
1539 static const struct attribute_group it87_group_temp[3] = {
1540         { .attrs = it87_attributes_temp[0] },
1541         { .attrs = it87_attributes_temp[1] },
1542         { .attrs = it87_attributes_temp[2] },
1543 };
1544 
1545 static struct attribute *it87_attributes_temp_offset[] = {
1546         &sensor_dev_attr_temp1_offset.dev_attr.attr,
1547         &sensor_dev_attr_temp2_offset.dev_attr.attr,
1548         &sensor_dev_attr_temp3_offset.dev_attr.attr,
1549 };
1550 
1551 static struct attribute *it87_attributes[] = {
1552         &dev_attr_alarms.attr,
1553         &sensor_dev_attr_intrusion0_alarm.dev_attr.attr,
1554         &dev_attr_name.attr,
1555         NULL
1556 };
1557 
1558 static const struct attribute_group it87_group = {
1559         .attrs = it87_attributes,
1560 };
1561 
1562 static struct attribute *it87_attributes_in_beep[] = {
1563         &sensor_dev_attr_in0_beep.dev_attr.attr,
1564         &sensor_dev_attr_in1_beep.dev_attr.attr,
1565         &sensor_dev_attr_in2_beep.dev_attr.attr,
1566         &sensor_dev_attr_in3_beep.dev_attr.attr,
1567         &sensor_dev_attr_in4_beep.dev_attr.attr,
1568         &sensor_dev_attr_in5_beep.dev_attr.attr,
1569         &sensor_dev_attr_in6_beep.dev_attr.attr,
1570         &sensor_dev_attr_in7_beep.dev_attr.attr,
1571         NULL,
1572         NULL,
1573 };
1574 
1575 static struct attribute *it87_attributes_temp_beep[] = {
1576         &sensor_dev_attr_temp1_beep.dev_attr.attr,
1577         &sensor_dev_attr_temp2_beep.dev_attr.attr,
1578         &sensor_dev_attr_temp3_beep.dev_attr.attr,
1579 };
1580 
1581 static struct attribute *it87_attributes_fan[5][3+1] = { {
1582         &sensor_dev_attr_fan1_input.dev_attr.attr,
1583         &sensor_dev_attr_fan1_min.dev_attr.attr,
1584         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1585         NULL
1586 }, {
1587         &sensor_dev_attr_fan2_input.dev_attr.attr,
1588         &sensor_dev_attr_fan2_min.dev_attr.attr,
1589         &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1590         NULL
1591 }, {
1592         &sensor_dev_attr_fan3_input.dev_attr.attr,
1593         &sensor_dev_attr_fan3_min.dev_attr.attr,
1594         &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1595         NULL
1596 }, {
1597         &sensor_dev_attr_fan4_input.dev_attr.attr,
1598         &sensor_dev_attr_fan4_min.dev_attr.attr,
1599         &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1600         NULL
1601 }, {
1602         &sensor_dev_attr_fan5_input.dev_attr.attr,
1603         &sensor_dev_attr_fan5_min.dev_attr.attr,
1604         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1605         NULL
1606 } };
1607 
1608 static const struct attribute_group it87_group_fan[5] = {
1609         { .attrs = it87_attributes_fan[0] },
1610         { .attrs = it87_attributes_fan[1] },
1611         { .attrs = it87_attributes_fan[2] },
1612         { .attrs = it87_attributes_fan[3] },
1613         { .attrs = it87_attributes_fan[4] },
1614 };
1615 
1616 static const struct attribute *it87_attributes_fan_div[] = {
1617         &sensor_dev_attr_fan1_div.dev_attr.attr,
1618         &sensor_dev_attr_fan2_div.dev_attr.attr,
1619         &sensor_dev_attr_fan3_div.dev_attr.attr,
1620 };
1621 
1622 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1623         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1624         &sensor_dev_attr_pwm1.dev_attr.attr,
1625         &dev_attr_pwm1_freq.attr,
1626         &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1627         NULL
1628 }, {
1629         &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1630         &sensor_dev_attr_pwm2.dev_attr.attr,
1631         &dev_attr_pwm2_freq.attr,
1632         &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1633         NULL
1634 }, {
1635         &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1636         &sensor_dev_attr_pwm3.dev_attr.attr,
1637         &dev_attr_pwm3_freq.attr,
1638         &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1639         NULL
1640 } };
1641 
1642 static const struct attribute_group it87_group_pwm[3] = {
1643         { .attrs = it87_attributes_pwm[0] },
1644         { .attrs = it87_attributes_pwm[1] },
1645         { .attrs = it87_attributes_pwm[2] },
1646 };
1647 
1648 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1649         &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1650         &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1651         &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1652         &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1653         &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1654         &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1655         &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1656         &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1657         &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1658         NULL
1659 }, {
1660         &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1661         &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1662         &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1663         &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1664         &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1665         &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1666         &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1667         &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1668         &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1669         NULL
1670 }, {
1671         &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1672         &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1673         &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1674         &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1675         &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1676         &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1677         &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1678         &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1679         &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1680         NULL
1681 } };
1682 
1683 static const struct attribute_group it87_group_autopwm[3] = {
1684         { .attrs = it87_attributes_autopwm[0] },
1685         { .attrs = it87_attributes_autopwm[1] },
1686         { .attrs = it87_attributes_autopwm[2] },
1687 };
1688 
1689 static struct attribute *it87_attributes_fan_beep[] = {
1690         &sensor_dev_attr_fan1_beep.dev_attr.attr,
1691         &sensor_dev_attr_fan2_beep.dev_attr.attr,
1692         &sensor_dev_attr_fan3_beep.dev_attr.attr,
1693         &sensor_dev_attr_fan4_beep.dev_attr.attr,
1694         &sensor_dev_attr_fan5_beep.dev_attr.attr,
1695 };
1696 
1697 static struct attribute *it87_attributes_vid[] = {
1698         &dev_attr_vrm.attr,
1699         &dev_attr_cpu0_vid.attr,
1700         NULL
1701 };
1702 
1703 static const struct attribute_group it87_group_vid = {
1704         .attrs = it87_attributes_vid,
1705 };
1706 
1707 static struct attribute *it87_attributes_label[] = {
1708         &sensor_dev_attr_in3_label.dev_attr.attr,
1709         &sensor_dev_attr_in7_label.dev_attr.attr,
1710         &sensor_dev_attr_in8_label.dev_attr.attr,
1711         &sensor_dev_attr_in9_label.dev_attr.attr,
1712         NULL
1713 };
1714 
1715 static const struct attribute_group it87_group_label = {
1716         .attrs = it87_attributes_label,
1717 };
1718 
1719 /* SuperIO detection - will change isa_address if a chip is found */
1720 static int __init it87_find(unsigned short *address,
1721         struct it87_sio_data *sio_data)
1722 {
1723         int err;
1724         u16 chip_type;
1725         const char *board_vendor, *board_name;
1726 
1727         err = superio_enter();
1728         if (err)
1729                 return err;
1730 
1731         err = -ENODEV;
1732         chip_type = force_id ? force_id : superio_inw(DEVID);
1733 
1734         switch (chip_type) {
1735         case IT8705F_DEVID:
1736                 sio_data->type = it87;
1737                 break;
1738         case IT8712F_DEVID:
1739                 sio_data->type = it8712;
1740                 break;
1741         case IT8716F_DEVID:
1742         case IT8726F_DEVID:
1743                 sio_data->type = it8716;
1744                 break;
1745         case IT8718F_DEVID:
1746                 sio_data->type = it8718;
1747                 break;
1748         case IT8720F_DEVID:
1749                 sio_data->type = it8720;
1750                 break;
1751         case IT8721F_DEVID:
1752                 sio_data->type = it8721;
1753                 break;
1754         case IT8728F_DEVID:
1755                 sio_data->type = it8728;
1756                 break;
1757         case IT8771E_DEVID:
1758                 sio_data->type = it8771;
1759                 break;
1760         case IT8772E_DEVID:
1761                 sio_data->type = it8772;
1762                 break;
1763         case IT8782F_DEVID:
1764                 sio_data->type = it8782;
1765                 break;
1766         case IT8783E_DEVID:
1767                 sio_data->type = it8783;
1768                 break;
1769         case IT8306E_DEVID:
1770                 sio_data->type = it8603;
1771                 break;
1772         case 0xffff:    /* No device at all */
1773                 goto exit;
1774         default:
1775                 pr_debug("Unsupported chip (DEVID=0x%x)\n", chip_type);
1776                 goto exit;
1777         }
1778 
1779         superio_select(PME);
1780         if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1781                 pr_info("Device not activated, skipping\n");
1782                 goto exit;
1783         }
1784 
1785         *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1786         if (*address == 0) {
1787                 pr_info("Base address not set, skipping\n");
1788                 goto exit;
1789         }
1790 
1791         err = 0;
1792         sio_data->revision = superio_inb(DEVREV) & 0x0f;
1793         pr_info("Found IT%04x%c chip at 0x%x, revision %d\n", chip_type,
1794                 chip_type == 0x8771 || chip_type == 0x8772 ||
1795                 chip_type == 0x8603 ? 'E' : 'F', *address,
1796                 sio_data->revision);
1797 
1798         /* in8 (Vbat) is always internal */
1799         sio_data->internal = (1 << 2);
1800         /* Only the IT8603E has in9 */
1801         if (sio_data->type != it8603)
1802                 sio_data->skip_in |= (1 << 9);
1803 
1804         /* Read GPIO config and VID value from LDN 7 (GPIO) */
1805         if (sio_data->type == it87) {
1806                 /* The IT8705F doesn't have VID pins at all */
1807                 sio_data->skip_vid = 1;
1808 
1809                 /* The IT8705F has a different LD number for GPIO */
1810                 superio_select(5);
1811                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1812         } else if (sio_data->type == it8783) {
1813                 int reg25, reg27, reg2a, reg2c, regef;
1814 
1815                 sio_data->skip_vid = 1; /* No VID */
1816 
1817                 superio_select(GPIO);
1818 
1819                 reg25 = superio_inb(IT87_SIO_GPIO1_REG);
1820                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1821                 reg2a = superio_inb(IT87_SIO_PINX1_REG);
1822                 reg2c = superio_inb(IT87_SIO_PINX2_REG);
1823                 regef = superio_inb(IT87_SIO_SPI_REG);
1824 
1825                 /* Check if fan3 is there or not */
1826                 if ((reg27 & (1 << 0)) || !(reg2c & (1 << 2)))
1827                         sio_data->skip_fan |= (1 << 2);
1828                 if ((reg25 & (1 << 4))
1829                     || (!(reg2a & (1 << 1)) && (regef & (1 << 0))))
1830                         sio_data->skip_pwm |= (1 << 2);
1831 
1832                 /* Check if fan2 is there or not */
1833                 if (reg27 & (1 << 7))
1834                         sio_data->skip_fan |= (1 << 1);
1835                 if (reg27 & (1 << 3))
1836                         sio_data->skip_pwm |= (1 << 1);
1837 
1838                 /* VIN5 */
1839                 if ((reg27 & (1 << 0)) || (reg2c & (1 << 2)))
1840                         sio_data->skip_in |= (1 << 5); /* No VIN5 */
1841 
1842                 /* VIN6 */
1843                 if (reg27 & (1 << 1))
1844                         sio_data->skip_in |= (1 << 6); /* No VIN6 */
1845 
1846                 /*
1847                  * VIN7
1848                  * Does not depend on bit 2 of Reg2C, contrary to datasheet.
1849                  */
1850                 if (reg27 & (1 << 2)) {
1851                         /*
1852                          * The data sheet is a bit unclear regarding the
1853                          * internal voltage divider for VCCH5V. It says
1854                          * "This bit enables and switches VIN7 (pin 91) to the
1855                          * internal voltage divider for VCCH5V".
1856                          * This is different to other chips, where the internal
1857                          * voltage divider would connect VIN7 to an internal
1858                          * voltage source. Maybe that is the case here as well.
1859                          *
1860                          * Since we don't know for sure, re-route it if that is
1861                          * not the case, and ask the user to report if the
1862                          * resulting voltage is sane.
1863                          */
1864                         if (!(reg2c & (1 << 1))) {
1865                                 reg2c |= (1 << 1);
1866                                 superio_outb(IT87_SIO_PINX2_REG, reg2c);
1867                                 pr_notice("Routing internal VCCH5V to in7.\n");
1868                         }
1869                         pr_notice("in7 routed to internal voltage divider, with external pin disabled.\n");
1870                         pr_notice("Please report if it displays a reasonable voltage.\n");
1871                 }
1872 
1873                 if (reg2c & (1 << 0))
1874                         sio_data->internal |= (1 << 0);
1875                 if (reg2c & (1 << 1))
1876                         sio_data->internal |= (1 << 1);
1877 
1878                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1879         } else if (sio_data->type == it8603) {
1880                 int reg27, reg29;
1881 
1882                 sio_data->skip_vid = 1; /* No VID */
1883                 superio_select(GPIO);
1884 
1885                 reg27 = superio_inb(IT87_SIO_GPIO3_REG);
1886 
1887                 /* Check if fan3 is there or not */
1888                 if (reg27 & (1 << 6))
1889                         sio_data->skip_pwm |= (1 << 2);
1890                 if (reg27 & (1 << 7))
1891                         sio_data->skip_fan |= (1 << 2);
1892 
1893                 /* Check if fan2 is there or not */
1894                 reg29 = superio_inb(IT87_SIO_GPIO5_REG);
1895                 if (reg29 & (1 << 1))
1896                         sio_data->skip_pwm |= (1 << 1);
1897                 if (reg29 & (1 << 2))
1898                         sio_data->skip_fan |= (1 << 1);
1899 
1900                 sio_data->skip_in |= (1 << 5); /* No VIN5 */
1901                 sio_data->skip_in |= (1 << 6); /* No VIN6 */
1902 
1903                 /* no fan4 */
1904                 sio_data->skip_pwm |= (1 << 3);
1905                 sio_data->skip_fan |= (1 << 3);
1906 
1907                 sio_data->internal |= (1 << 1); /* in7 is VSB */
1908                 sio_data->internal |= (1 << 3); /* in9 is AVCC */
1909 
1910                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1911         } else {
1912                 int reg;
1913                 bool uart6;
1914 
1915                 superio_select(GPIO);
1916 
1917                 reg = superio_inb(IT87_SIO_GPIO3_REG);
1918                 if (sio_data->type == it8721 || sio_data->type == it8728 ||
1919                     sio_data->type == it8771 || sio_data->type == it8772 ||
1920                     sio_data->type == it8782) {
1921                         /*
1922                          * IT8721F/IT8758E, and IT8782F don't have VID pins
1923                          * at all, not sure about the IT8728F and compatibles.
1924                          */
1925                         sio_data->skip_vid = 1;
1926                 } else {
1927                         /* We need at least 4 VID pins */
1928                         if (reg & 0x0f) {
1929                                 pr_info("VID is disabled (pins used for GPIO)\n");
1930                                 sio_data->skip_vid = 1;
1931                         }
1932                 }
1933 
1934                 /* Check if fan3 is there or not */
1935                 if (reg & (1 << 6))
1936                         sio_data->skip_pwm |= (1 << 2);
1937                 if (reg & (1 << 7))
1938                         sio_data->skip_fan |= (1 << 2);
1939 
1940                 /* Check if fan2 is there or not */
1941                 reg = superio_inb(IT87_SIO_GPIO5_REG);
1942                 if (reg & (1 << 1))
1943                         sio_data->skip_pwm |= (1 << 1);
1944                 if (reg & (1 << 2))
1945                         sio_data->skip_fan |= (1 << 1);
1946 
1947                 if ((sio_data->type == it8718 || sio_data->type == it8720)
1948                  && !(sio_data->skip_vid))
1949                         sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1950 
1951                 reg = superio_inb(IT87_SIO_PINX2_REG);
1952 
1953                 uart6 = sio_data->type == it8782 && (reg & (1 << 2));
1954 
1955                 /*
1956                  * The IT8720F has no VIN7 pin, so VCCH should always be
1957                  * routed internally to VIN7 with an internal divider.
1958                  * Curiously, there still is a configuration bit to control
1959                  * this, which means it can be set incorrectly. And even
1960                  * more curiously, many boards out there are improperly
1961                  * configured, even though the IT8720F datasheet claims
1962                  * that the internal routing of VCCH to VIN7 is the default
1963                  * setting. So we force the internal routing in this case.
1964                  *
1965                  * On IT8782F, VIN7 is multiplexed with one of the UART6 pins.
1966                  * If UART6 is enabled, re-route VIN7 to the internal divider
1967                  * if that is not already the case.
1968                  */
1969                 if ((sio_data->type == it8720 || uart6) && !(reg & (1 << 1))) {
1970                         reg |= (1 << 1);
1971                         superio_outb(IT87_SIO_PINX2_REG, reg);
1972                         pr_notice("Routing internal VCCH to in7\n");
1973                 }
1974                 if (reg & (1 << 0))
1975                         sio_data->internal |= (1 << 0);
1976                 if ((reg & (1 << 1)) || sio_data->type == it8721 ||
1977                     sio_data->type == it8728 ||
1978                     sio_data->type == it8771 ||
1979                     sio_data->type == it8772)
1980                         sio_data->internal |= (1 << 1);
1981 
1982                 /*
1983                  * On IT8782F, UART6 pins overlap with VIN5, VIN6, and VIN7.
1984                  * While VIN7 can be routed to the internal voltage divider,
1985                  * VIN5 and VIN6 are not available if UART6 is enabled.
1986                  *
1987                  * Also, temp3 is not available if UART6 is enabled and TEMPIN3
1988                  * is the temperature source. Since we can not read the
1989                  * temperature source here, skip_temp is preliminary.
1990                  */
1991                 if (uart6) {
1992                         sio_data->skip_in |= (1 << 5) | (1 << 6);
1993                         sio_data->skip_temp |= (1 << 2);
1994                 }
1995 
1996                 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1997         }
1998         if (sio_data->beep_pin)
1999                 pr_info("Beeping is supported\n");
2000 
2001         /* Disable specific features based on DMI strings */
2002         board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
2003         board_name = dmi_get_system_info(DMI_BOARD_NAME);
2004         if (board_vendor && board_name) {
2005                 if (strcmp(board_vendor, "nVIDIA") == 0
2006                  && strcmp(board_name, "FN68PT") == 0) {
2007                         /*
2008                          * On the Shuttle SN68PT, FAN_CTL2 is apparently not
2009                          * connected to a fan, but to something else. One user
2010                          * has reported instant system power-off when changing
2011                          * the PWM2 duty cycle, so we disable it.
2012                          * I use the board name string as the trigger in case
2013                          * the same board is ever used in other systems.
2014                          */
2015                         pr_info("Disabling pwm2 due to hardware constraints\n");
2016                         sio_data->skip_pwm = (1 << 1);
2017                 }
2018         }
2019 
2020 exit:
2021         superio_exit();
2022         return err;
2023 }
2024 
2025 static void it87_remove_files(struct device *dev)
2026 {
2027         struct it87_data *data = platform_get_drvdata(pdev);
2028         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2029         int i;
2030 
2031         sysfs_remove_group(&dev->kobj, &it87_group);
2032         for (i = 0; i < 10; i++) {
2033                 if (sio_data->skip_in & (1 << i))
2034                         continue;
2035                 sysfs_remove_group(&dev->kobj, &it87_group_in[i]);
2036                 if (it87_attributes_in_beep[i])
2037                         sysfs_remove_file(&dev->kobj,
2038                                           it87_attributes_in_beep[i]);
2039         }
2040         for (i = 0; i < 3; i++) {
2041                 if (!(data->has_temp & (1 << i)))
2042                         continue;
2043                 sysfs_remove_group(&dev->kobj, &it87_group_temp[i]);
2044                 if (has_temp_offset(data))
2045                         sysfs_remove_file(&dev->kobj,
2046                                           it87_attributes_temp_offset[i]);
2047                 if (sio_data->beep_pin)
2048                         sysfs_remove_file(&dev->kobj,
2049                                           it87_attributes_temp_beep[i]);
2050         }
2051         for (i = 0; i < 5; i++) {
2052                 if (!(data->has_fan & (1 << i)))
2053                         continue;
2054                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
2055                 if (sio_data->beep_pin)
2056                         sysfs_remove_file(&dev->kobj,
2057                                           it87_attributes_fan_beep[i]);
2058                 if (i < 3 && !has_16bit_fans(data))
2059                         sysfs_remove_file(&dev->kobj,
2060                                           it87_attributes_fan_div[i]);
2061         }
2062         for (i = 0; i < 3; i++) {
2063                 if (sio_data->skip_pwm & (1 << 0))
2064                         continue;
2065                 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
2066                 if (has_old_autopwm(data))
2067                         sysfs_remove_group(&dev->kobj,
2068                                            &it87_group_autopwm[i]);
2069         }
2070         if (!sio_data->skip_vid)
2071                 sysfs_remove_group(&dev->kobj, &it87_group_vid);
2072         sysfs_remove_group(&dev->kobj, &it87_group_label);
2073 }
2074 
2075 static int it87_probe(struct platform_device *pdev)
2076 {
2077         struct it87_data *data;
2078         struct resource *res;
2079         struct device *dev = &pdev->dev;
2080         struct it87_sio_data *sio_data = dev_get_platdata(dev);
2081         int err = 0, i;
2082         int enable_pwm_interface;
2083         int fan_beep_need_rw;
2084 
2085         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
2086         if (!devm_request_region(&pdev->dev, res->start, IT87_EC_EXTENT,
2087                                  DRVNAME)) {
2088                 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
2089                         (unsigned long)res->start,
2090                         (unsigned long)(res->start + IT87_EC_EXTENT - 1));
2091                 return -EBUSY;
2092         }
2093 
2094         data = devm_kzalloc(&pdev->dev, sizeof(struct it87_data), GFP_KERNEL);
2095         if (!data)
2096                 return -ENOMEM;
2097 
2098         data->addr = res->start;
2099         data->type = sio_data->type;
2100         data->features = it87_devices[sio_data->type].features;
2101         data->peci_mask = it87_devices[sio_data->type].peci_mask;
2102         data->old_peci_mask = it87_devices[sio_data->type].old_peci_mask;
2103         data->name = it87_devices[sio_data->type].name;
2104         /*
2105          * IT8705F Datasheet 0.4.1, 3h == Version G.
2106          * IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
2107          * These are the first revisions with 16-bit tachometer support.
2108          */
2109         switch (data->type) {
2110         case it87:
2111                 if (sio_data->revision >= 0x03) {
2112                         data->features &= ~FEAT_OLD_AUTOPWM;
2113                         data->features |= FEAT_16BIT_FANS;
2114                 }
2115                 break;
2116         case it8712:
2117                 if (sio_data->revision >= 0x08) {
2118                         data->features &= ~FEAT_OLD_AUTOPWM;
2119                         data->features |= FEAT_16BIT_FANS;
2120                 }
2121                 break;
2122         default:
2123                 break;
2124         }
2125 
2126         /* Now, we do the remaining detection. */
2127         if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
2128          || it87_read_value(data, IT87_REG_CHIPID) != 0x90)
2129                 return -ENODEV;
2130 
2131         platform_set_drvdata(pdev, data);
2132 
2133         mutex_init(&data->update_lock);
2134 
2135         /* Check PWM configuration */
2136         enable_pwm_interface = it87_check_pwm(dev);
2137 
2138         /* Starting with IT8721F, we handle scaling of internal voltages */
2139         if (has_12mv_adc(data)) {
2140                 if (sio_data->internal & (1 << 0))
2141                         data->in_scaled |= (1 << 3);    /* in3 is AVCC */
2142                 if (sio_data->internal & (1 << 1))
2143                         data->in_scaled |= (1 << 7);    /* in7 is VSB */
2144                 if (sio_data->internal & (1 << 2))
2145                         data->in_scaled |= (1 << 8);    /* in8 is Vbat */
2146                 if (sio_data->internal & (1 << 3))
2147                         data->in_scaled |= (1 << 9);    /* in9 is AVCC */
2148         } else if (sio_data->type == it8782 || sio_data->type == it8783) {
2149                 if (sio_data->internal & (1 << 0))
2150                         data->in_scaled |= (1 << 3);    /* in3 is VCC5V */
2151                 if (sio_data->internal & (1 << 1))
2152                         data->in_scaled |= (1 << 7);    /* in7 is VCCH5V */
2153         }
2154 
2155         data->has_temp = 0x07;
2156         if (sio_data->skip_temp & (1 << 2)) {
2157                 if (sio_data->type == it8782
2158                     && !(it87_read_value(data, IT87_REG_TEMP_EXTRA) & 0x80))
2159                         data->has_temp &= ~(1 << 2);
2160         }
2161 
2162         /* Initialize the IT87 chip */
2163         it87_init_device(pdev);
2164 
2165         /* Register sysfs hooks */
2166         err = sysfs_create_group(&dev->kobj, &it87_group);
2167         if (err)
2168                 return err;
2169 
2170         for (i = 0; i < 10; i++) {
2171                 if (sio_data->skip_in & (1 << i))
2172                         continue;
2173                 err = sysfs_create_group(&dev->kobj, &it87_group_in[i]);
2174                 if (err)
2175                         goto error;
2176                 if (sio_data->beep_pin && it87_attributes_in_beep[i]) {
2177                         err = sysfs_create_file(&dev->kobj,
2178                                                 it87_attributes_in_beep[i]);
2179                         if (err)
2180                                 goto error;
2181                 }
2182         }
2183 
2184         for (i = 0; i < 3; i++) {
2185                 if (!(data->has_temp & (1 << i)))
2186                         continue;
2187                 err = sysfs_create_group(&dev->kobj, &it87_group_temp[i]);
2188                 if (err)
2189                         goto error;
2190                 if (has_temp_offset(data)) {
2191                         err = sysfs_create_file(&dev->kobj,
2192                                                 it87_attributes_temp_offset[i]);
2193                         if (err)
2194                                 goto error;
2195                 }
2196                 if (sio_data->beep_pin) {
2197                         err = sysfs_create_file(&dev->kobj,
2198                                                 it87_attributes_temp_beep[i]);
2199                         if (err)
2200                                 goto error;
2201                 }
2202         }
2203 
2204         /* Do not create fan files for disabled fans */
2205         fan_beep_need_rw = 1;
2206         for (i = 0; i < 5; i++) {
2207                 if (!(data->has_fan & (1 << i)))
2208                         continue;
2209                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
2210                 if (err)
2211                         goto error;
2212 
2213                 if (i < 3 && !has_16bit_fans(data)) {
2214                         err = sysfs_create_file(&dev->kobj,
2215                                                 it87_attributes_fan_div[i]);
2216                         if (err)
2217                                 goto error;
2218                 }
2219 
2220                 if (sio_data->beep_pin) {
2221                         err = sysfs_create_file(&dev->kobj,
2222                                                 it87_attributes_fan_beep[i]);
2223                         if (err)
2224                                 goto error;
2225                         if (!fan_beep_need_rw)
2226                                 continue;
2227 
2228                         /*
2229                          * As we have a single beep enable bit for all fans,
2230                          * only the first enabled fan has a writable attribute
2231                          * for it.
2232                          */
2233                         if (sysfs_chmod_file(&dev->kobj,
2234                                              it87_attributes_fan_beep[i],
2235                                              S_IRUGO | S_IWUSR))
2236                                 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
2237                                         i + 1);
2238                         fan_beep_need_rw = 0;
2239                 }
2240         }
2241 
2242         if (enable_pwm_interface) {
2243                 for (i = 0; i < 3; i++) {
2244                         if (sio_data->skip_pwm & (1 << i))
2245                                 continue;
2246                         err = sysfs_create_group(&dev->kobj,
2247                                                  &it87_group_pwm[i]);
2248                         if (err)
2249                                 goto error;
2250 
2251                         if (!has_old_autopwm(data))
2252                                 continue;
2253                         err = sysfs_create_group(&dev->kobj,
2254                                                  &it87_group_autopwm[i]);
2255                         if (err)
2256                                 goto error;
2257                 }
2258         }
2259 
2260         if (!sio_data->skip_vid) {
2261                 data->vrm = vid_which_vrm();
2262                 /* VID reading from Super-I/O config space if available */
2263                 data->vid = sio_data->vid_value;
2264                 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
2265                 if (err)
2266                         goto error;
2267         }
2268 
2269         /* Export labels for internal sensors */
2270         for (i = 0; i < 4; i++) {
2271                 if (!(sio_data->internal & (1 << i)))
2272                         continue;
2273                 err = sysfs_create_file(&dev->kobj,
2274                                         it87_attributes_label[i]);
2275                 if (err)
2276                         goto error;
2277         }
2278 
2279         data->hwmon_dev = hwmon_device_register(dev);
2280         if (IS_ERR(data->hwmon_dev)) {
2281                 err = PTR_ERR(data->hwmon_dev);
2282                 goto error;
2283         }
2284 
2285         return 0;
2286 
2287 error:
2288         it87_remove_files(dev);
2289         return err;
2290 }
2291 
2292 static int it87_remove(struct platform_device *pdev)
2293 {
2294         struct it87_data *data = platform_get_drvdata(pdev);
2295 
2296         hwmon_device_unregister(data->hwmon_dev);
2297         it87_remove_files(&pdev->dev);
2298 
2299         return 0;
2300 }
2301 
2302 /*
2303  * Must be called with data->update_lock held, except during initialization.
2304  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2305  * would slow down the IT87 access and should not be necessary.
2306  */
2307 static int it87_read_value(struct it87_data *data, u8 reg)
2308 {
2309         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2310         return inb_p(data->addr + IT87_DATA_REG_OFFSET);
2311 }
2312 
2313 /*
2314  * Must be called with data->update_lock held, except during initialization.
2315  * We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
2316  * would slow down the IT87 access and should not be necessary.
2317  */
2318 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
2319 {
2320         outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
2321         outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
2322 }
2323 
2324 /* Return 1 if and only if the PWM interface is safe to use */
2325 static int it87_check_pwm(struct device *dev)
2326 {
2327         struct it87_data *data = dev_get_drvdata(dev);
2328         /*
2329          * Some BIOSes fail to correctly configure the IT87 fans. All fans off
2330          * and polarity set to active low is sign that this is the case so we
2331          * disable pwm control to protect the user.
2332          */
2333         int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
2334         if ((tmp & 0x87) == 0) {
2335                 if (fix_pwm_polarity) {
2336                         /*
2337                          * The user asks us to attempt a chip reconfiguration.
2338                          * This means switching to active high polarity and
2339                          * inverting all fan speed values.
2340                          */
2341                         int i;
2342                         u8 pwm[3];
2343 
2344                         for (i = 0; i < 3; i++)
2345                                 pwm[i] = it87_read_value(data,
2346                                                          IT87_REG_PWM(i));
2347 
2348                         /*
2349                          * If any fan is in automatic pwm mode, the polarity
2350                          * might be correct, as suspicious as it seems, so we
2351                          * better don't change anything (but still disable the
2352                          * PWM interface).
2353                          */
2354                         if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
2355                                 dev_info(dev,
2356                                          "Reconfiguring PWM to active high polarity\n");
2357                                 it87_write_value(data, IT87_REG_FAN_CTL,
2358                                                  tmp | 0x87);
2359                                 for (i = 0; i < 3; i++)
2360                                         it87_write_value(data,
2361                                                          IT87_REG_PWM(i),
2362                                                          0x7f & ~pwm[i]);
2363                                 return 1;
2364                         }
2365 
2366                         dev_info(dev,
2367                                  "PWM configuration is too broken to be fixed\n");
2368                 }
2369 
2370                 dev_info(dev,
2371                          "Detected broken BIOS defaults, disabling PWM interface\n");
2372                 return 0;
2373         } else if (fix_pwm_polarity) {
2374                 dev_info(dev,
2375                          "PWM configuration looks sane, won't touch\n");
2376         }
2377 
2378         return 1;
2379 }
2380 
2381 /* Called when we have found a new IT87. */
2382 static void it87_init_device(struct platform_device *pdev)
2383 {
2384         struct it87_sio_data *sio_data = dev_get_platdata(&pdev->dev);
2385         struct it87_data *data = platform_get_drvdata(pdev);
2386         int tmp, i;
2387         u8 mask;
2388 
2389         /*
2390          * For each PWM channel:
2391          * - If it is in automatic mode, setting to manual mode should set
2392          *   the fan to full speed by default.
2393          * - If it is in manual mode, we need a mapping to temperature
2394          *   channels to use when later setting to automatic mode later.
2395          *   Use a 1:1 mapping by default (we are clueless.)
2396          * In both cases, the value can (and should) be changed by the user
2397          * prior to switching to a different mode.
2398          * Note that this is no longer needed for the IT8721F and later, as
2399          * these have separate registers for the temperature mapping and the
2400          * manual duty cycle.
2401          */
2402         for (i = 0; i < 3; i++) {
2403                 data->pwm_temp_map[i] = i;
2404                 data->pwm_duty[i] = 0x7f;       /* Full speed */
2405                 data->auto_pwm[i][3] = 0x7f;    /* Full speed, hard-coded */
2406         }
2407 
2408         /*
2409          * Some chips seem to have default value 0xff for all limit
2410          * registers. For low voltage limits it makes no sense and triggers
2411          * alarms, so change to 0 instead. For high temperature limits, it
2412          * means -1 degree C, which surprisingly doesn't trigger an alarm,
2413          * but is still confusing, so change to 127 degrees C.
2414          */
2415         for (i = 0; i < 8; i++) {
2416                 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
2417                 if (tmp == 0xff)
2418                         it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
2419         }
2420         for (i = 0; i < 3; i++) {
2421                 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2422                 if (tmp == 0xff)
2423                         it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
2424         }
2425 
2426         /*
2427          * Temperature channels are not forcibly enabled, as they can be
2428          * set to two different sensor types and we can't guess which one
2429          * is correct for a given system. These channels can be enabled at
2430          * run-time through the temp{1-3}_type sysfs accessors if needed.
2431          */
2432 
2433         /* Check if voltage monitors are reset manually or by some reason */
2434         tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
2435         if ((tmp & 0xff) == 0) {
2436                 /* Enable all voltage monitors */
2437                 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
2438         }
2439 
2440         /* Check if tachometers are reset manually or by some reason */
2441         mask = 0x70 & ~(sio_data->skip_fan << 4);
2442         data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
2443         if ((data->fan_main_ctrl & mask) == 0) {
2444                 /* Enable all fan tachometers */
2445                 data->fan_main_ctrl |= mask;
2446                 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
2447                                  data->fan_main_ctrl);
2448         }
2449         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
2450 
2451         /* Set tachometers to 16-bit mode if needed, IT8603E (and IT8728F?)
2452          * has it by default */
2453         if (has_16bit_fans(data) && data->type != it8603) {
2454                 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
2455                 if (~tmp & 0x07 & data->has_fan) {
2456                         dev_dbg(&pdev->dev,
2457                                 "Setting fan1-3 to 16-bit mode\n");
2458                         it87_write_value(data, IT87_REG_FAN_16BIT,
2459                                          tmp | 0x07);
2460                 }
2461                 /* IT8705F, IT8782F, and IT8783E/F only support three fans. */
2462                 if (data->type != it87 && data->type != it8782 &&
2463                     data->type != it8783) {
2464                         if (tmp & (1 << 4))
2465                                 data->has_fan |= (1 << 3); /* fan4 enabled */
2466                         if (tmp & (1 << 5))
2467                                 data->has_fan |= (1 << 4); /* fan5 enabled */
2468                 }
2469         }
2470 
2471         /* Fan input pins may be used for alternative functions */
2472         data->has_fan &= ~sio_data->skip_fan;
2473 
2474         /* Start monitoring */
2475         it87_write_value(data, IT87_REG_CONFIG,
2476                          (it87_read_value(data, IT87_REG_CONFIG) & 0x3e)
2477                          | (update_vbat ? 0x41 : 0x01));
2478 }
2479 
2480 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
2481 {
2482         data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
2483         if (has_newer_autopwm(data)) {
2484                 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2485                 data->pwm_duty[nr] = it87_read_value(data,
2486                                                      IT87_REG_PWM_DUTY(nr));
2487         } else {
2488                 if (data->pwm_ctrl[nr] & 0x80)  /* Automatic mode */
2489                         data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
2490                 else                            /* Manual mode */
2491                         data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
2492         }
2493 
2494         if (has_old_autopwm(data)) {
2495                 int i;
2496 
2497                 for (i = 0; i < 5 ; i++)
2498                         data->auto_temp[nr][i] = it87_read_value(data,
2499                                                 IT87_REG_AUTO_TEMP(nr, i));
2500                 for (i = 0; i < 3 ; i++)
2501                         data->auto_pwm[nr][i] = it87_read_value(data,
2502                                                 IT87_REG_AUTO_PWM(nr, i));
2503         }
2504 }
2505 
2506 static struct it87_data *it87_update_device(struct device *dev)
2507 {
2508         struct it87_data *data = dev_get_drvdata(dev);
2509         int i;
2510 
2511         mutex_lock(&data->update_lock);
2512 
2513         if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
2514             || !data->valid) {
2515                 if (update_vbat) {
2516                         /*
2517                          * Cleared after each update, so reenable.  Value
2518                          * returned by this read will be previous value
2519                          */
2520                         it87_write_value(data, IT87_REG_CONFIG,
2521                                 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
2522                 }
2523                 for (i = 0; i <= 7; i++) {
2524                         data->in[i][0] =
2525                                 it87_read_value(data, IT87_REG_VIN(i));
2526                         data->in[i][1] =
2527                                 it87_read_value(data, IT87_REG_VIN_MIN(i));
2528                         data->in[i][2] =
2529                                 it87_read_value(data, IT87_REG_VIN_MAX(i));
2530                 }
2531                 /* in8 (battery) has no limit registers */
2532                 data->in[8][0] = it87_read_value(data, IT87_REG_VIN(8));
2533                 if (data->type == it8603)
2534                         data->in[9][0] = it87_read_value(data, 0x2f);
2535 
2536                 for (i = 0; i < 5; i++) {
2537                         /* Skip disabled fans */
2538                         if (!(data->has_fan & (1 << i)))
2539                                 continue;
2540 
2541                         data->fan[i][1] =
2542                                 it87_read_value(data, IT87_REG_FAN_MIN[i]);
2543                         data->fan[i][0] = it87_read_value(data,
2544                                        IT87_REG_FAN[i]);
2545                         /* Add high byte if in 16-bit mode */
2546                         if (has_16bit_fans(data)) {
2547                                 data->fan[i][0] |= it87_read_value(data,
2548                                                 IT87_REG_FANX[i]) << 8;
2549                                 data->fan[i][1] |= it87_read_value(data,
2550                                                 IT87_REG_FANX_MIN[i]) << 8;
2551                         }
2552                 }
2553                 for (i = 0; i < 3; i++) {
2554                         if (!(data->has_temp & (1 << i)))
2555                                 continue;
2556                         data->temp[i][0] =
2557                                 it87_read_value(data, IT87_REG_TEMP(i));
2558                         data->temp[i][1] =
2559                                 it87_read_value(data, IT87_REG_TEMP_LOW(i));
2560                         data->temp[i][2] =
2561                                 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
2562                         if (has_temp_offset(data))
2563                                 data->temp[i][3] =
2564                                   it87_read_value(data,
2565                                                   IT87_REG_TEMP_OFFSET[i]);
2566                 }
2567 
2568                 /* Newer chips don't have clock dividers */
2569                 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
2570                         i = it87_read_value(data, IT87_REG_FAN_DIV);
2571                         data->fan_div[0] = i & 0x07;
2572                         data->fan_div[1] = (i >> 3) & 0x07;
2573                         data->fan_div[2] = (i & 0x40) ? 3 : 1;
2574                 }
2575 
2576                 data->alarms =
2577                         it87_read_value(data, IT87_REG_ALARM1) |
2578                         (it87_read_value(data, IT87_REG_ALARM2) << 8) |
2579                         (it87_read_value(data, IT87_REG_ALARM3) << 16);
2580                 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
2581 
2582                 data->fan_main_ctrl = it87_read_value(data,
2583                                 IT87_REG_FAN_MAIN_CTRL);
2584                 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
2585                 for (i = 0; i < 3; i++)
2586                         it87_update_pwm_ctrl(data, i);
2587 
2588                 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
2589                 data->extra = it87_read_value(data, IT87_REG_TEMP_EXTRA);
2590                 /*
2591                  * The IT8705F does not have VID capability.
2592                  * The IT8718F and later don't use IT87_REG_VID for the
2593                  * same purpose.
2594                  */
2595                 if (data->type == it8712 || data->type == it8716) {
2596                         data->vid = it87_read_value(data, IT87_REG_VID);
2597                         /*
2598                          * The older IT8712F revisions had only 5 VID pins,
2599                          * but we assume it is always safe to read 6 bits.
2600                          */
2601                         data->vid &= 0x3f;
2602                 }
2603                 data->last_updated = jiffies;
2604                 data->valid = 1;
2605         }
2606 
2607         mutex_unlock(&data->update_lock);
2608 
2609         return data;
2610 }
2611 
2612 static int __init it87_device_add(unsigned short address,
2613                                   const struct it87_sio_data *sio_data)
2614 {
2615         struct resource res = {
2616                 .start  = address + IT87_EC_OFFSET,
2617                 .end    = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
2618                 .name   = DRVNAME,
2619                 .flags  = IORESOURCE_IO,
2620         };
2621         int err;
2622 
2623         err = acpi_check_resource_conflict(&res);
2624         if (err)
2625                 goto exit;
2626 
2627         pdev = platform_device_alloc(DRVNAME, address);
2628         if (!pdev) {
2629                 err = -ENOMEM;
2630                 pr_err("Device allocation failed\n");
2631                 goto exit;
2632         }
2633 
2634         err = platform_device_add_resources(pdev, &res, 1);
2635         if (err) {
2636                 pr_err("Device resource addition failed (%d)\n", err);
2637                 goto exit_device_put;
2638         }
2639 
2640         err = platform_device_add_data(pdev, sio_data,
2641                                        sizeof(struct it87_sio_data));
2642         if (err) {
2643                 pr_err("Platform data allocation failed\n");
2644                 goto exit_device_put;
2645         }
2646 
2647         err = platform_device_add(pdev);
2648         if (err) {
2649                 pr_err("Device addition failed (%d)\n", err);
2650                 goto exit_device_put;
2651         }
2652 
2653         return 0;
2654 
2655 exit_device_put:
2656         platform_device_put(pdev);
2657 exit:
2658         return err;
2659 }
2660 
2661 static int __init sm_it87_init(void)
2662 {
2663         int err;
2664         unsigned short isa_address = 0;
2665         struct it87_sio_data sio_data;
2666 
2667         memset(&sio_data, 0, sizeof(struct it87_sio_data));
2668         err = it87_find(&isa_address, &sio_data);
2669         if (err)
2670                 return err;
2671         err = platform_driver_register(&it87_driver);
2672         if (err)
2673                 return err;
2674 
2675         err = it87_device_add(isa_address, &sio_data);
2676         if (err) {
2677                 platform_driver_unregister(&it87_driver);
2678                 return err;
2679         }
2680 
2681         return 0;
2682 }
2683 
2684 static void __exit sm_it87_exit(void)
2685 {
2686         platform_device_unregister(pdev);
2687         platform_driver_unregister(&it87_driver);
2688 }
2689 
2690 
2691 MODULE_AUTHOR("Chris Gauthron, Jean Delvare <jdelvare@suse.de>");
2692 MODULE_DESCRIPTION("IT8705F/IT871xF/IT872xF hardware monitoring driver");
2693 module_param(update_vbat, bool, 0);
2694 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2695 module_param(fix_pwm_polarity, bool, 0);
2696 MODULE_PARM_DESC(fix_pwm_polarity,
2697                  "Force PWM polarity to active high (DANGEROUS)");
2698 MODULE_LICENSE("GPL");
2699 
2700 module_init(sm_it87_init);
2701 module_exit(sm_it87_exit);
2702 

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