2 * pc87427.c - hardware monitoring driver for the
3 * National Semiconductor PC87427 Super-I/O chip
4 * Copyright (C) 2006, 2008, 2010 Jean Delvare <jdelvare@suse.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * Supports the following chips:
17 * Chip #vin #fan #pwm #temp devid
18 * PC87427 - 8 4 6 0xF2
20 * This driver assumes that no more than one chip is present.
21 * Only fans are fully supported so far. Temperatures are in read-only
22 * mode, and voltages aren't supported at all.
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/jiffies.h>
31 #include <linux/platform_device.h>
32 #include <linux/hwmon.h>
33 #include <linux/hwmon-sysfs.h>
34 #include <linux/err.h>
35 #include <linux/mutex.h>
36 #include <linux/sysfs.h>
37 #include <linux/ioport.h>
38 #include <linux/acpi.h>
41 static unsigned short force_id;
42 module_param(force_id, ushort, 0);
43 MODULE_PARM_DESC(force_id, "Override the detected device ID");
45 static struct platform_device *pdev;
47 #define DRVNAME "pc87427"
50 * The lock mutex protects both the I/O accesses (needed because the
51 * device is using banked registers) and the register cache (needed to keep
52 * the data in the registers and the cache in sync at any time).
55 struct device *hwmon_dev;
60 unsigned long last_updated; /* in jiffies */
61 u8 fan_enabled; /* bit vector */
62 u16 fan[8]; /* register values */
63 u16 fan_min[8]; /* register values */
64 u8 fan_status[8]; /* register values */
66 u8 pwm_enabled; /* bit vector */
67 u8 pwm_auto_ok; /* bit vector */
68 u8 pwm_enable[4]; /* register values */
69 u8 pwm[4]; /* register values */
71 u8 temp_enabled; /* bit vector */
72 s16 temp[6]; /* register values */
73 s8 temp_min[6]; /* register values */
74 s8 temp_max[6]; /* register values */
75 s8 temp_crit[6]; /* register values */
76 u8 temp_status[6]; /* register values */
77 u8 temp_type[6]; /* register values */
80 struct pc87427_sio_data {
81 unsigned short address[2];
87 * Super-I/O registers and operations
90 #define SIOREG_LDSEL 0x07 /* Logical device select */
91 #define SIOREG_DEVID 0x20 /* Device ID */
92 #define SIOREG_CF2 0x22 /* Configuration 2 */
93 #define SIOREG_CF3 0x23 /* Configuration 3 */
94 #define SIOREG_CF4 0x24 /* Configuration 4 */
95 #define SIOREG_CF5 0x25 /* Configuration 5 */
96 #define SIOREG_CFB 0x2B /* Configuration B */
97 #define SIOREG_CFC 0x2C /* Configuration C */
98 #define SIOREG_CFD 0x2D /* Configuration D */
99 #define SIOREG_ACT 0x30 /* Device activation */
100 #define SIOREG_MAP 0x50 /* I/O or memory mapping */
101 #define SIOREG_IOBASE 0x60 /* I/O base address */
103 static const u8 logdev[2] = { 0x09, 0x14 };
104 static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
109 static inline int superio_enter(int sioaddr)
111 if (!request_muxed_region(sioaddr, 2, DRVNAME))
116 static inline void superio_outb(int sioaddr, int reg, int val)
119 outb(val, sioaddr + 1);
122 static inline int superio_inb(int sioaddr, int reg)
125 return inb(sioaddr + 1);
128 static inline void superio_exit(int sioaddr)
131 outb(0x02, sioaddr + 1);
132 release_region(sioaddr, 2);
139 #define REGION_LENGTH 32
140 #define PC87427_REG_BANK 0x0f
141 #define BANK_FM(nr) (nr)
142 #define BANK_FT(nr) (0x08 + (nr))
143 #define BANK_FC(nr) (0x10 + (nr) * 2)
144 #define BANK_TM(nr) (nr)
145 #define BANK_VM(nr) (0x08 + (nr))
148 * I/O access functions
151 /* ldi is the logical device index */
152 static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)
154 return inb(data->address[ldi] + reg);
157 /* Must be called with data->lock held, except during init */
158 static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,
161 outb(bank, data->address[ldi] + PC87427_REG_BANK);
162 return inb(data->address[ldi] + reg);
165 /* Must be called with data->lock held, except during init */
166 static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,
167 u8 bank, u8 reg, u8 value)
169 outb(bank, data->address[ldi] + PC87427_REG_BANK);
170 outb(value, data->address[ldi] + reg);
174 * Fan registers and conversions
177 /* fan data registers are 16-bit wide */
178 #define PC87427_REG_FAN 0x12
179 #define PC87427_REG_FAN_MIN 0x14
180 #define PC87427_REG_FAN_STATUS 0x10
182 #define FAN_STATUS_STALL (1 << 3)
183 #define FAN_STATUS_LOSPD (1 << 1)
184 #define FAN_STATUS_MONEN (1 << 0)
187 * Dedicated function to read all registers related to a given fan input.
188 * This saves us quite a few locks and bank selections.
189 * Must be called with data->lock held.
192 static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
194 int iobase = data->address[LD_FAN];
196 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
197 data->fan[nr] = inw(iobase + PC87427_REG_FAN);
198 data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);
199 data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);
200 /* Clear fan alarm bits */
201 outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);
205 * The 2 LSB of fan speed registers are used for something different.
206 * The actual 2 LSB of the measurements are not available.
208 static inline unsigned long fan_from_reg(u16 reg)
211 if (reg == 0x0000 || reg == 0xfffc)
213 return 5400000UL / reg;
216 /* The 2 LSB of the fan speed limit registers are not significant. */
217 static inline u16 fan_to_reg(unsigned long val)
221 if (val >= 1350000UL)
223 return ((1350000UL + val / 2) / val) << 2;
227 * PWM registers and conversions
230 #define PC87427_REG_PWM_ENABLE 0x10
231 #define PC87427_REG_PWM_DUTY 0x12
233 #define PWM_ENABLE_MODE_MASK (7 << 4)
234 #define PWM_ENABLE_CTLEN (1 << 0)
236 #define PWM_MODE_MANUAL (0 << 4)
237 #define PWM_MODE_AUTO (1 << 4)
238 #define PWM_MODE_OFF (2 << 4)
239 #define PWM_MODE_ON (7 << 4)
242 * Dedicated function to read all registers related to a given PWM output.
243 * This saves us quite a few locks and bank selections.
244 * Must be called with data->lock held.
247 static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr)
249 int iobase = data->address[LD_FAN];
251 outb(BANK_FC(nr), iobase + PC87427_REG_BANK);
252 data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE);
253 data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY);
256 static inline int pwm_enable_from_reg(u8 reg)
258 switch (reg & PWM_ENABLE_MODE_MASK) {
261 case PWM_MODE_MANUAL:
271 static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval)
277 return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF;
279 return PWM_MODE_AUTO;
284 * Temperature registers and conversions
287 #define PC87427_REG_TEMP_STATUS 0x10
288 #define PC87427_REG_TEMP 0x14
289 #define PC87427_REG_TEMP_MAX 0x18
290 #define PC87427_REG_TEMP_MIN 0x19
291 #define PC87427_REG_TEMP_CRIT 0x1a
292 #define PC87427_REG_TEMP_TYPE 0x1d
294 #define TEMP_STATUS_CHANEN (1 << 0)
295 #define TEMP_STATUS_LOWFLG (1 << 1)
296 #define TEMP_STATUS_HIGHFLG (1 << 2)
297 #define TEMP_STATUS_CRITFLG (1 << 3)
298 #define TEMP_STATUS_SENSERR (1 << 5)
299 #define TEMP_TYPE_MASK (3 << 5)
301 #define TEMP_TYPE_THERMISTOR (1 << 5)
302 #define TEMP_TYPE_REMOTE_DIODE (2 << 5)
303 #define TEMP_TYPE_LOCAL_DIODE (3 << 5)
306 * Dedicated function to read all registers related to a given temperature
307 * input. This saves us quite a few locks and bank selections.
308 * Must be called with data->lock held.
311 static void pc87427_readall_temp(struct pc87427_data *data, u8 nr)
313 int iobase = data->address[LD_TEMP];
315 outb(BANK_TM(nr), iobase + PC87427_REG_BANK);
316 data->temp[nr] = le16_to_cpu(inw(iobase + PC87427_REG_TEMP));
317 data->temp_max[nr] = inb(iobase + PC87427_REG_TEMP_MAX);
318 data->temp_min[nr] = inb(iobase + PC87427_REG_TEMP_MIN);
319 data->temp_crit[nr] = inb(iobase + PC87427_REG_TEMP_CRIT);
320 data->temp_type[nr] = inb(iobase + PC87427_REG_TEMP_TYPE);
321 data->temp_status[nr] = inb(iobase + PC87427_REG_TEMP_STATUS);
322 /* Clear fan alarm bits */
323 outb(data->temp_status[nr], iobase + PC87427_REG_TEMP_STATUS);
326 static inline unsigned int temp_type_from_reg(u8 reg)
328 switch (reg & TEMP_TYPE_MASK) {
329 case TEMP_TYPE_THERMISTOR:
331 case TEMP_TYPE_REMOTE_DIODE:
332 case TEMP_TYPE_LOCAL_DIODE:
340 * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible
341 * too, but I have no idea how to figure out when they are used.
343 static inline long temp_from_reg(s16 reg)
345 return reg * 1000 / 256;
348 static inline long temp_from_reg8(s8 reg)
357 static struct pc87427_data *pc87427_update_device(struct device *dev)
359 struct pc87427_data *data = dev_get_drvdata(dev);
362 mutex_lock(&data->lock);
363 if (!time_after(jiffies, data->last_updated + HZ)
364 && data->last_updated)
368 for (i = 0; i < 8; i++) {
369 if (!(data->fan_enabled & (1 << i)))
371 pc87427_readall_fan(data, i);
375 for (i = 0; i < 4; i++) {
376 if (!(data->pwm_enabled & (1 << i)))
378 pc87427_readall_pwm(data, i);
381 /* Temperature channels */
382 for (i = 0; i < 6; i++) {
383 if (!(data->temp_enabled & (1 << i)))
385 pc87427_readall_temp(data, i);
388 data->last_updated = jiffies;
391 mutex_unlock(&data->lock);
395 static ssize_t fan_input_show(struct device *dev,
396 struct device_attribute *devattr, char *buf)
398 struct pc87427_data *data = pc87427_update_device(dev);
399 int nr = to_sensor_dev_attr(devattr)->index;
401 return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));
404 static ssize_t fan_min_show(struct device *dev,
405 struct device_attribute *devattr, char *buf)
407 struct pc87427_data *data = pc87427_update_device(dev);
408 int nr = to_sensor_dev_attr(devattr)->index;
410 return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));
413 static ssize_t fan_alarm_show(struct device *dev,
414 struct device_attribute *devattr, char *buf)
416 struct pc87427_data *data = pc87427_update_device(dev);
417 int nr = to_sensor_dev_attr(devattr)->index;
419 return sprintf(buf, "%d\n", !!(data->fan_status[nr]
420 & FAN_STATUS_LOSPD));
423 static ssize_t fan_fault_show(struct device *dev,
424 struct device_attribute *devattr, char *buf)
426 struct pc87427_data *data = pc87427_update_device(dev);
427 int nr = to_sensor_dev_attr(devattr)->index;
429 return sprintf(buf, "%d\n", !!(data->fan_status[nr]
430 & FAN_STATUS_STALL));
433 static ssize_t fan_min_store(struct device *dev,
434 struct device_attribute *devattr,
435 const char *buf, size_t count)
437 struct pc87427_data *data = dev_get_drvdata(dev);
438 int nr = to_sensor_dev_attr(devattr)->index;
440 int iobase = data->address[LD_FAN];
442 if (kstrtoul(buf, 10, &val) < 0)
445 mutex_lock(&data->lock);
446 outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
448 * The low speed limit registers are read-only while monitoring
449 * is enabled, so we have to disable monitoring, then change the
450 * limit, and finally enable monitoring again.
452 outb(0, iobase + PC87427_REG_FAN_STATUS);
453 data->fan_min[nr] = fan_to_reg(val);
454 outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
455 outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
456 mutex_unlock(&data->lock);
461 static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
462 static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
463 static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_input, 2);
464 static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_input, 3);
465 static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_input, 4);
466 static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_input, 5);
467 static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_input, 6);
468 static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_input, 7);
470 static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
471 static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
472 static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
473 static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
474 static SENSOR_DEVICE_ATTR_RW(fan5_min, fan_min, 4);
475 static SENSOR_DEVICE_ATTR_RW(fan6_min, fan_min, 5);
476 static SENSOR_DEVICE_ATTR_RW(fan7_min, fan_min, 6);
477 static SENSOR_DEVICE_ATTR_RW(fan8_min, fan_min, 7);
479 static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0);
480 static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1);
481 static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2);
482 static SENSOR_DEVICE_ATTR_RO(fan4_alarm, fan_alarm, 3);
483 static SENSOR_DEVICE_ATTR_RO(fan5_alarm, fan_alarm, 4);
484 static SENSOR_DEVICE_ATTR_RO(fan6_alarm, fan_alarm, 5);
485 static SENSOR_DEVICE_ATTR_RO(fan7_alarm, fan_alarm, 6);
486 static SENSOR_DEVICE_ATTR_RO(fan8_alarm, fan_alarm, 7);
488 static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan_fault, 0);
489 static SENSOR_DEVICE_ATTR_RO(fan2_fault, fan_fault, 1);
490 static SENSOR_DEVICE_ATTR_RO(fan3_fault, fan_fault, 2);
491 static SENSOR_DEVICE_ATTR_RO(fan4_fault, fan_fault, 3);
492 static SENSOR_DEVICE_ATTR_RO(fan5_fault, fan_fault, 4);
493 static SENSOR_DEVICE_ATTR_RO(fan6_fault, fan_fault, 5);
494 static SENSOR_DEVICE_ATTR_RO(fan7_fault, fan_fault, 6);
495 static SENSOR_DEVICE_ATTR_RO(fan8_fault, fan_fault, 7);
497 static struct attribute *pc87427_attributes_fan[8][5] = {
499 &sensor_dev_attr_fan1_input.dev_attr.attr,
500 &sensor_dev_attr_fan1_min.dev_attr.attr,
501 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
502 &sensor_dev_attr_fan1_fault.dev_attr.attr,
505 &sensor_dev_attr_fan2_input.dev_attr.attr,
506 &sensor_dev_attr_fan2_min.dev_attr.attr,
507 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
508 &sensor_dev_attr_fan2_fault.dev_attr.attr,
511 &sensor_dev_attr_fan3_input.dev_attr.attr,
512 &sensor_dev_attr_fan3_min.dev_attr.attr,
513 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
514 &sensor_dev_attr_fan3_fault.dev_attr.attr,
517 &sensor_dev_attr_fan4_input.dev_attr.attr,
518 &sensor_dev_attr_fan4_min.dev_attr.attr,
519 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
520 &sensor_dev_attr_fan4_fault.dev_attr.attr,
523 &sensor_dev_attr_fan5_input.dev_attr.attr,
524 &sensor_dev_attr_fan5_min.dev_attr.attr,
525 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
526 &sensor_dev_attr_fan5_fault.dev_attr.attr,
529 &sensor_dev_attr_fan6_input.dev_attr.attr,
530 &sensor_dev_attr_fan6_min.dev_attr.attr,
531 &sensor_dev_attr_fan6_alarm.dev_attr.attr,
532 &sensor_dev_attr_fan6_fault.dev_attr.attr,
535 &sensor_dev_attr_fan7_input.dev_attr.attr,
536 &sensor_dev_attr_fan7_min.dev_attr.attr,
537 &sensor_dev_attr_fan7_alarm.dev_attr.attr,
538 &sensor_dev_attr_fan7_fault.dev_attr.attr,
541 &sensor_dev_attr_fan8_input.dev_attr.attr,
542 &sensor_dev_attr_fan8_min.dev_attr.attr,
543 &sensor_dev_attr_fan8_alarm.dev_attr.attr,
544 &sensor_dev_attr_fan8_fault.dev_attr.attr,
549 static const struct attribute_group pc87427_group_fan[8] = {
550 { .attrs = pc87427_attributes_fan[0] },
551 { .attrs = pc87427_attributes_fan[1] },
552 { .attrs = pc87427_attributes_fan[2] },
553 { .attrs = pc87427_attributes_fan[3] },
554 { .attrs = pc87427_attributes_fan[4] },
555 { .attrs = pc87427_attributes_fan[5] },
556 { .attrs = pc87427_attributes_fan[6] },
557 { .attrs = pc87427_attributes_fan[7] },
561 * Must be called with data->lock held and pc87427_readall_pwm() freshly
564 static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
566 int iobase = data->address[LD_FAN];
567 data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;
568 data->pwm_enable[nr] |= mode;
569 outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);
572 static ssize_t pwm_enable_show(struct device *dev,
573 struct device_attribute *devattr, char *buf)
575 struct pc87427_data *data = pc87427_update_device(dev);
576 int nr = to_sensor_dev_attr(devattr)->index;
579 pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);
582 return sprintf(buf, "%d\n", pwm_enable);
585 static ssize_t pwm_enable_store(struct device *dev,
586 struct device_attribute *devattr,
587 const char *buf, size_t count)
589 struct pc87427_data *data = dev_get_drvdata(dev);
590 int nr = to_sensor_dev_attr(devattr)->index;
593 if (kstrtoul(buf, 10, &val) < 0 || val > 2)
595 /* Can't go to automatic mode if it isn't configured */
596 if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))
599 mutex_lock(&data->lock);
600 pc87427_readall_pwm(data, nr);
601 update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));
602 mutex_unlock(&data->lock);
607 static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
610 struct pc87427_data *data = pc87427_update_device(dev);
611 int nr = to_sensor_dev_attr(devattr)->index;
613 return sprintf(buf, "%d\n", (int)data->pwm[nr]);
616 static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
617 const char *buf, size_t count)
619 struct pc87427_data *data = dev_get_drvdata(dev);
620 int nr = to_sensor_dev_attr(devattr)->index;
622 int iobase = data->address[LD_FAN];
625 if (kstrtoul(buf, 10, &val) < 0 || val > 0xff)
628 mutex_lock(&data->lock);
629 pc87427_readall_pwm(data, nr);
630 mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;
631 if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {
633 "Can't set PWM%d duty cycle while not in manual mode\n",
635 mutex_unlock(&data->lock);
639 /* We may have to change the mode */
640 if (mode == PWM_MODE_MANUAL && val == 0) {
641 /* Transition from Manual to Off */
642 update_pwm_enable(data, nr, PWM_MODE_OFF);
644 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
646 } else if (mode == PWM_MODE_OFF && val != 0) {
647 /* Transition from Off to Manual */
648 update_pwm_enable(data, nr, PWM_MODE_MANUAL);
649 mode = PWM_MODE_MANUAL;
650 dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
655 if (mode == PWM_MODE_MANUAL)
656 outb(val, iobase + PC87427_REG_PWM_DUTY);
657 mutex_unlock(&data->lock);
662 static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);
663 static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);
664 static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);
665 static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_enable, 3);
667 static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
668 static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
669 static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
670 static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
672 static struct attribute *pc87427_attributes_pwm[4][3] = {
674 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
675 &sensor_dev_attr_pwm1.dev_attr.attr,
678 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
679 &sensor_dev_attr_pwm2.dev_attr.attr,
682 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
683 &sensor_dev_attr_pwm3.dev_attr.attr,
686 &sensor_dev_attr_pwm4_enable.dev_attr.attr,
687 &sensor_dev_attr_pwm4.dev_attr.attr,
692 static const struct attribute_group pc87427_group_pwm[4] = {
693 { .attrs = pc87427_attributes_pwm[0] },
694 { .attrs = pc87427_attributes_pwm[1] },
695 { .attrs = pc87427_attributes_pwm[2] },
696 { .attrs = pc87427_attributes_pwm[3] },
699 static ssize_t temp_input_show(struct device *dev,
700 struct device_attribute *devattr, char *buf)
702 struct pc87427_data *data = pc87427_update_device(dev);
703 int nr = to_sensor_dev_attr(devattr)->index;
705 return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
708 static ssize_t temp_min_show(struct device *dev,
709 struct device_attribute *devattr, char *buf)
711 struct pc87427_data *data = pc87427_update_device(dev);
712 int nr = to_sensor_dev_attr(devattr)->index;
714 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));
717 static ssize_t temp_max_show(struct device *dev,
718 struct device_attribute *devattr, char *buf)
720 struct pc87427_data *data = pc87427_update_device(dev);
721 int nr = to_sensor_dev_attr(devattr)->index;
723 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));
726 static ssize_t temp_crit_show(struct device *dev,
727 struct device_attribute *devattr, char *buf)
729 struct pc87427_data *data = pc87427_update_device(dev);
730 int nr = to_sensor_dev_attr(devattr)->index;
732 return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));
735 static ssize_t temp_type_show(struct device *dev,
736 struct device_attribute *devattr, char *buf)
738 struct pc87427_data *data = pc87427_update_device(dev);
739 int nr = to_sensor_dev_attr(devattr)->index;
741 return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));
744 static ssize_t temp_min_alarm_show(struct device *dev,
745 struct device_attribute *devattr,
748 struct pc87427_data *data = pc87427_update_device(dev);
749 int nr = to_sensor_dev_attr(devattr)->index;
751 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
752 & TEMP_STATUS_LOWFLG));
755 static ssize_t temp_max_alarm_show(struct device *dev,
756 struct device_attribute *devattr,
759 struct pc87427_data *data = pc87427_update_device(dev);
760 int nr = to_sensor_dev_attr(devattr)->index;
762 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
763 & TEMP_STATUS_HIGHFLG));
766 static ssize_t temp_crit_alarm_show(struct device *dev,
767 struct device_attribute *devattr,
770 struct pc87427_data *data = pc87427_update_device(dev);
771 int nr = to_sensor_dev_attr(devattr)->index;
773 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
774 & TEMP_STATUS_CRITFLG));
777 static ssize_t temp_fault_show(struct device *dev,
778 struct device_attribute *devattr, char *buf)
780 struct pc87427_data *data = pc87427_update_device(dev);
781 int nr = to_sensor_dev_attr(devattr)->index;
783 return sprintf(buf, "%d\n", !!(data->temp_status[nr]
784 & TEMP_STATUS_SENSERR));
787 static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
788 static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
789 static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2);
790 static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3);
791 static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4);
792 static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5);
794 static SENSOR_DEVICE_ATTR_RO(temp1_min, temp_min, 0);
795 static SENSOR_DEVICE_ATTR_RO(temp2_min, temp_min, 1);
796 static SENSOR_DEVICE_ATTR_RO(temp3_min, temp_min, 2);
797 static SENSOR_DEVICE_ATTR_RO(temp4_min, temp_min, 3);
798 static SENSOR_DEVICE_ATTR_RO(temp5_min, temp_min, 4);
799 static SENSOR_DEVICE_ATTR_RO(temp6_min, temp_min, 5);
801 static SENSOR_DEVICE_ATTR_RO(temp1_max, temp_max, 0);
802 static SENSOR_DEVICE_ATTR_RO(temp2_max, temp_max, 1);
803 static SENSOR_DEVICE_ATTR_RO(temp3_max, temp_max, 2);
804 static SENSOR_DEVICE_ATTR_RO(temp4_max, temp_max, 3);
805 static SENSOR_DEVICE_ATTR_RO(temp5_max, temp_max, 4);
806 static SENSOR_DEVICE_ATTR_RO(temp6_max, temp_max, 5);
808 static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);
809 static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_crit, 1);
810 static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_crit, 2);
811 static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp_crit, 3);
812 static SENSOR_DEVICE_ATTR_RO(temp5_crit, temp_crit, 4);
813 static SENSOR_DEVICE_ATTR_RO(temp6_crit, temp_crit, 5);
815 static SENSOR_DEVICE_ATTR_RO(temp1_type, temp_type, 0);
816 static SENSOR_DEVICE_ATTR_RO(temp2_type, temp_type, 1);
817 static SENSOR_DEVICE_ATTR_RO(temp3_type, temp_type, 2);
818 static SENSOR_DEVICE_ATTR_RO(temp4_type, temp_type, 3);
819 static SENSOR_DEVICE_ATTR_RO(temp5_type, temp_type, 4);
820 static SENSOR_DEVICE_ATTR_RO(temp6_type, temp_type, 5);
822 static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_min_alarm, 0);
823 static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_min_alarm, 1);
824 static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, temp_min_alarm, 2);
825 static SENSOR_DEVICE_ATTR_RO(temp4_min_alarm, temp_min_alarm, 3);
826 static SENSOR_DEVICE_ATTR_RO(temp5_min_alarm, temp_min_alarm, 4);
827 static SENSOR_DEVICE_ATTR_RO(temp6_min_alarm, temp_min_alarm, 5);
829 static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_max_alarm, 0);
830 static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_max_alarm, 1);
831 static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, temp_max_alarm, 2);
832 static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, temp_max_alarm, 3);
833 static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, temp_max_alarm, 4);
834 static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, temp_max_alarm, 5);
836 static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, temp_crit_alarm, 0);
837 static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, temp_crit_alarm, 1);
838 static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, temp_crit_alarm, 2);
839 static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, temp_crit_alarm, 3);
840 static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, temp_crit_alarm, 4);
841 static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, temp_crit_alarm, 5);
843 static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
844 static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
845 static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
846 static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
847 static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
848 static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
850 static struct attribute *pc87427_attributes_temp[6][10] = {
852 &sensor_dev_attr_temp1_input.dev_attr.attr,
853 &sensor_dev_attr_temp1_min.dev_attr.attr,
854 &sensor_dev_attr_temp1_max.dev_attr.attr,
855 &sensor_dev_attr_temp1_crit.dev_attr.attr,
856 &sensor_dev_attr_temp1_type.dev_attr.attr,
857 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
858 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
859 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
860 &sensor_dev_attr_temp1_fault.dev_attr.attr,
863 &sensor_dev_attr_temp2_input.dev_attr.attr,
864 &sensor_dev_attr_temp2_min.dev_attr.attr,
865 &sensor_dev_attr_temp2_max.dev_attr.attr,
866 &sensor_dev_attr_temp2_crit.dev_attr.attr,
867 &sensor_dev_attr_temp2_type.dev_attr.attr,
868 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
869 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
870 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
871 &sensor_dev_attr_temp2_fault.dev_attr.attr,
874 &sensor_dev_attr_temp3_input.dev_attr.attr,
875 &sensor_dev_attr_temp3_min.dev_attr.attr,
876 &sensor_dev_attr_temp3_max.dev_attr.attr,
877 &sensor_dev_attr_temp3_crit.dev_attr.attr,
878 &sensor_dev_attr_temp3_type.dev_attr.attr,
879 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
880 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
881 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
882 &sensor_dev_attr_temp3_fault.dev_attr.attr,
885 &sensor_dev_attr_temp4_input.dev_attr.attr,
886 &sensor_dev_attr_temp4_min.dev_attr.attr,
887 &sensor_dev_attr_temp4_max.dev_attr.attr,
888 &sensor_dev_attr_temp4_crit.dev_attr.attr,
889 &sensor_dev_attr_temp4_type.dev_attr.attr,
890 &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
891 &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
892 &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
893 &sensor_dev_attr_temp4_fault.dev_attr.attr,
896 &sensor_dev_attr_temp5_input.dev_attr.attr,
897 &sensor_dev_attr_temp5_min.dev_attr.attr,
898 &sensor_dev_attr_temp5_max.dev_attr.attr,
899 &sensor_dev_attr_temp5_crit.dev_attr.attr,
900 &sensor_dev_attr_temp5_type.dev_attr.attr,
901 &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
902 &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
903 &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
904 &sensor_dev_attr_temp5_fault.dev_attr.attr,
907 &sensor_dev_attr_temp6_input.dev_attr.attr,
908 &sensor_dev_attr_temp6_min.dev_attr.attr,
909 &sensor_dev_attr_temp6_max.dev_attr.attr,
910 &sensor_dev_attr_temp6_crit.dev_attr.attr,
911 &sensor_dev_attr_temp6_type.dev_attr.attr,
912 &sensor_dev_attr_temp6_min_alarm.dev_attr.attr,
913 &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
914 &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
915 &sensor_dev_attr_temp6_fault.dev_attr.attr,
920 static const struct attribute_group pc87427_group_temp[6] = {
921 { .attrs = pc87427_attributes_temp[0] },
922 { .attrs = pc87427_attributes_temp[1] },
923 { .attrs = pc87427_attributes_temp[2] },
924 { .attrs = pc87427_attributes_temp[3] },
925 { .attrs = pc87427_attributes_temp[4] },
926 { .attrs = pc87427_attributes_temp[5] },
929 static ssize_t name_show(struct device *dev, struct device_attribute
932 struct pc87427_data *data = dev_get_drvdata(dev);
934 return sprintf(buf, "%s\n", data->name);
936 static DEVICE_ATTR_RO(name);
940 * Device detection, attach and detach
943 static int pc87427_request_regions(struct platform_device *pdev,
946 struct resource *res;
949 for (i = 0; i < count; i++) {
950 res = platform_get_resource(pdev, IORESOURCE_IO, i);
952 dev_err(&pdev->dev, "Missing resource #%d\n", i);
955 if (!devm_request_region(&pdev->dev, res->start,
956 resource_size(res), DRVNAME)) {
958 "Failed to request region 0x%lx-0x%lx\n",
959 (unsigned long)res->start,
960 (unsigned long)res->end);
967 static void pc87427_init_device(struct device *dev)
969 struct pc87427_sio_data *sio_data = dev_get_platdata(dev);
970 struct pc87427_data *data = dev_get_drvdata(dev);
974 /* The FMC module should be ready */
975 reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
977 dev_warn(dev, "%s module not ready!\n", "FMC");
979 /* Check which fans are enabled */
980 for (i = 0; i < 8; i++) {
981 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
983 reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
984 PC87427_REG_FAN_STATUS);
985 if (reg & FAN_STATUS_MONEN)
986 data->fan_enabled |= (1 << i);
989 if (!data->fan_enabled) {
990 dev_dbg(dev, "Enabling monitoring of all fans\n");
991 for (i = 0; i < 8; i++) {
992 if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
994 pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
995 PC87427_REG_FAN_STATUS,
998 data->fan_enabled = sio_data->has_fanin;
1001 /* Check which PWM outputs are enabled */
1002 for (i = 0; i < 4; i++) {
1003 if (!(sio_data->has_fanout & (1 << i))) /* Not wired */
1005 reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
1006 PC87427_REG_PWM_ENABLE);
1007 if (reg & PWM_ENABLE_CTLEN)
1008 data->pwm_enabled |= (1 << i);
1011 * We don't expose an interface to reconfigure the automatic
1012 * fan control mode, so only allow to return to this mode if
1013 * it was originally set.
1015 if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
1016 dev_dbg(dev, "PWM%d is in automatic control mode\n",
1018 data->pwm_auto_ok |= (1 << i);
1022 /* The HMC module should be ready */
1023 reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);
1025 dev_warn(dev, "%s module not ready!\n", "HMC");
1027 /* Check which temperature channels are enabled */
1028 for (i = 0; i < 6; i++) {
1029 reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),
1030 PC87427_REG_TEMP_STATUS);
1031 if (reg & TEMP_STATUS_CHANEN)
1032 data->temp_enabled |= (1 << i);
1036 static void pc87427_remove_files(struct device *dev)
1038 struct pc87427_data *data = dev_get_drvdata(dev);
1041 device_remove_file(dev, &dev_attr_name);
1042 for (i = 0; i < 8; i++) {
1043 if (!(data->fan_enabled & (1 << i)))
1045 sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);
1047 for (i = 0; i < 4; i++) {
1048 if (!(data->pwm_enabled & (1 << i)))
1050 sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);
1052 for (i = 0; i < 6; i++) {
1053 if (!(data->temp_enabled & (1 << i)))
1055 sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);
1059 static int pc87427_probe(struct platform_device *pdev)
1061 struct pc87427_sio_data *sio_data = dev_get_platdata(&pdev->dev);
1062 struct pc87427_data *data;
1063 int i, err, res_count;
1065 data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
1070 data->address[0] = sio_data->address[0];
1071 data->address[1] = sio_data->address[1];
1072 res_count = (data->address[0] != 0) + (data->address[1] != 0);
1074 err = pc87427_request_regions(pdev, res_count);
1078 mutex_init(&data->lock);
1079 data->name = "pc87427";
1080 platform_set_drvdata(pdev, data);
1081 pc87427_init_device(&pdev->dev);
1083 /* Register sysfs hooks */
1084 err = device_create_file(&pdev->dev, &dev_attr_name);
1087 for (i = 0; i < 8; i++) {
1088 if (!(data->fan_enabled & (1 << i)))
1090 err = sysfs_create_group(&pdev->dev.kobj,
1091 &pc87427_group_fan[i]);
1093 goto exit_remove_files;
1095 for (i = 0; i < 4; i++) {
1096 if (!(data->pwm_enabled & (1 << i)))
1098 err = sysfs_create_group(&pdev->dev.kobj,
1099 &pc87427_group_pwm[i]);
1101 goto exit_remove_files;
1103 for (i = 0; i < 6; i++) {
1104 if (!(data->temp_enabled & (1 << i)))
1106 err = sysfs_create_group(&pdev->dev.kobj,
1107 &pc87427_group_temp[i]);
1109 goto exit_remove_files;
1112 data->hwmon_dev = hwmon_device_register(&pdev->dev);
1113 if (IS_ERR(data->hwmon_dev)) {
1114 err = PTR_ERR(data->hwmon_dev);
1115 dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
1116 goto exit_remove_files;
1122 pc87427_remove_files(&pdev->dev);
1126 static int pc87427_remove(struct platform_device *pdev)
1128 struct pc87427_data *data = platform_get_drvdata(pdev);
1130 hwmon_device_unregister(data->hwmon_dev);
1131 pc87427_remove_files(&pdev->dev);
1137 static struct platform_driver pc87427_driver = {
1141 .probe = pc87427_probe,
1142 .remove = pc87427_remove,
1145 static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
1147 struct resource res[2] = {
1148 { .flags = IORESOURCE_IO },
1149 { .flags = IORESOURCE_IO },
1151 int err, i, res_count;
1154 for (i = 0; i < 2; i++) {
1155 if (!sio_data->address[i])
1157 res[res_count].start = sio_data->address[i];
1158 res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
1159 res[res_count].name = logdev_str[i];
1161 err = acpi_check_resource_conflict(&res[res_count]);
1168 pdev = platform_device_alloc(DRVNAME, res[0].start);
1171 pr_err("Device allocation failed\n");
1175 err = platform_device_add_resources(pdev, res, res_count);
1177 pr_err("Device resource addition failed (%d)\n", err);
1178 goto exit_device_put;
1181 err = platform_device_add_data(pdev, sio_data,
1182 sizeof(struct pc87427_sio_data));
1184 pr_err("Platform data allocation failed\n");
1185 goto exit_device_put;
1188 err = platform_device_add(pdev);
1190 pr_err("Device addition failed (%d)\n", err);
1191 goto exit_device_put;
1197 platform_device_put(pdev);
1202 static int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
1208 err = superio_enter(sioaddr);
1212 /* Identify device */
1213 val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
1214 if (val != 0xf2) { /* PC87427 */
1219 for (i = 0; i < 2; i++) {
1220 sio_data->address[i] = 0;
1221 /* Select logical device */
1222 superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
1224 val = superio_inb(sioaddr, SIOREG_ACT);
1225 if (!(val & 0x01)) {
1226 pr_info("Logical device 0x%02x not activated\n",
1231 val = superio_inb(sioaddr, SIOREG_MAP);
1233 pr_warn("Logical device 0x%02x is memory-mapped, can't use\n",
1238 val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
1239 | superio_inb(sioaddr, SIOREG_IOBASE + 1);
1241 pr_info("I/O base address not set for logical device 0x%02x\n",
1245 sio_data->address[i] = val;
1248 /* No point in loading the driver if everything is disabled */
1249 if (!sio_data->address[0] && !sio_data->address[1]) {
1254 /* Check which fan inputs are wired */
1255 sio_data->has_fanin = (1 << 2) | (1 << 3); /* FANIN2, FANIN3 */
1257 cfg = superio_inb(sioaddr, SIOREG_CF2);
1258 if (!(cfg & (1 << 3)))
1259 sio_data->has_fanin |= (1 << 0); /* FANIN0 */
1260 if (!(cfg & (1 << 2)))
1261 sio_data->has_fanin |= (1 << 4); /* FANIN4 */
1263 cfg = superio_inb(sioaddr, SIOREG_CFD);
1264 if (!(cfg & (1 << 0)))
1265 sio_data->has_fanin |= (1 << 1); /* FANIN1 */
1267 cfg = superio_inb(sioaddr, SIOREG_CF4);
1268 if (!(cfg & (1 << 0)))
1269 sio_data->has_fanin |= (1 << 7); /* FANIN7 */
1270 cfg_b = superio_inb(sioaddr, SIOREG_CFB);
1271 if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
1272 sio_data->has_fanin |= (1 << 5); /* FANIN5 */
1273 cfg = superio_inb(sioaddr, SIOREG_CF3);
1274 if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
1275 sio_data->has_fanin |= (1 << 6); /* FANIN6 */
1277 /* Check which fan outputs are wired */
1278 sio_data->has_fanout = (1 << 0); /* FANOUT0 */
1279 if (cfg_b & (1 << 0))
1280 sio_data->has_fanout |= (1 << 3); /* FANOUT3 */
1282 cfg = superio_inb(sioaddr, SIOREG_CFC);
1283 if (!(cfg & (1 << 4))) {
1284 if (cfg_b & (1 << 1))
1285 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1286 if (cfg_b & (1 << 2))
1287 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1290 /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
1291 cfg = superio_inb(sioaddr, SIOREG_CF5);
1293 sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
1295 sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
1298 superio_exit(sioaddr);
1302 static int __init pc87427_init(void)
1305 struct pc87427_sio_data sio_data;
1307 if (pc87427_find(0x2e, &sio_data)
1308 && pc87427_find(0x4e, &sio_data))
1311 err = platform_driver_register(&pc87427_driver);
1315 /* Sets global pdev as a side effect */
1316 err = pc87427_device_add(&sio_data);
1323 platform_driver_unregister(&pc87427_driver);
1328 static void __exit pc87427_exit(void)
1330 platform_device_unregister(pdev);
1331 platform_driver_unregister(&pc87427_driver);
1334 MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
1335 MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
1336 MODULE_LICENSE("GPL");
1338 module_init(pc87427_init);
1339 module_exit(pc87427_exit);