2 * it87.c - Part of lm_sensors, Linux kernel modules for hardware
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
10 * This driver supports only the Environment Controller in the IT8705F and
11 * similar parts. The other devices are supported by different drivers.
13 * Supports: IT8705F Super I/O chip w/LPC interface
14 * IT8712F Super I/O chip w/LPC interface
15 * IT8716F Super I/O chip w/LPC interface
16 * IT8718F Super I/O chip w/LPC interface
17 * IT8720F Super I/O chip w/LPC interface
18 * IT8726F Super I/O chip w/LPC interface
19 * Sis950 A clone of the IT8705F
21 * Copyright (C) 2001 Chris Gauthron
22 * Copyright (C) 2005-2010 Jean Delvare <khali@linux-fr.org>
24 * This program is free software; you can redistribute it and/or modify
25 * it under the terms of the GNU General Public License as published by
26 * the Free Software Foundation; either version 2 of the License, or
27 * (at your option) any later version.
29 * This program is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
32 * GNU General Public License for more details.
34 * You should have received a copy of the GNU General Public License
35 * along with this program; if not, write to the Free Software
36 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
39 #include <linux/module.h>
40 #include <linux/init.h>
41 #include <linux/slab.h>
42 #include <linux/jiffies.h>
43 #include <linux/platform_device.h>
44 #include <linux/hwmon.h>
45 #include <linux/hwmon-sysfs.h>
46 #include <linux/hwmon-vid.h>
47 #include <linux/err.h>
48 #include <linux/mutex.h>
49 #include <linux/sysfs.h>
50 #include <linux/string.h>
51 #include <linux/dmi.h>
52 #include <linux/acpi.h>
55 #define DRVNAME "it87"
57 enum chips { it87, it8712, it8716, it8718, it8720 };
59 static unsigned short force_id;
60 module_param(force_id, ushort, 0);
61 MODULE_PARM_DESC(force_id, "Override the detected device ID");
63 static struct platform_device *pdev;
65 #define REG 0x2e /* The register to read/write */
66 #define DEV 0x07 /* Register: Logical device select */
67 #define VAL 0x2f /* The value to read/write */
68 #define PME 0x04 /* The device with the fan registers in it */
70 /* The device with the IT8718F/IT8720F VID value in it */
73 #define DEVID 0x20 /* Register: Device ID */
74 #define DEVREV 0x22 /* Register: Device Revision */
83 static int superio_inw(int reg)
94 superio_select(int ldn)
116 /* Logical device 4 registers */
117 #define IT8712F_DEVID 0x8712
118 #define IT8705F_DEVID 0x8705
119 #define IT8716F_DEVID 0x8716
120 #define IT8718F_DEVID 0x8718
121 #define IT8720F_DEVID 0x8720
122 #define IT8726F_DEVID 0x8726
123 #define IT87_ACT_REG 0x30
124 #define IT87_BASE_REG 0x60
126 /* Logical device 7 registers (IT8712F and later) */
127 #define IT87_SIO_GPIO3_REG 0x27
128 #define IT87_SIO_GPIO5_REG 0x29
129 #define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
130 #define IT87_SIO_VID_REG 0xfc /* VID value */
131 #define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
133 /* Update battery voltage after every reading if true */
134 static int update_vbat;
136 /* Not all BIOSes properly configure the PWM registers */
137 static int fix_pwm_polarity;
139 /* Many IT87 constants specified below */
141 /* Length of ISA address segment */
142 #define IT87_EXTENT 8
144 /* Length of ISA address segment for Environmental Controller */
145 #define IT87_EC_EXTENT 2
147 /* Offset of EC registers from ISA base address */
148 #define IT87_EC_OFFSET 5
150 /* Where are the ISA address/data registers relative to the EC base address */
151 #define IT87_ADDR_REG_OFFSET 0
152 #define IT87_DATA_REG_OFFSET 1
154 /*----- The IT87 registers -----*/
156 #define IT87_REG_CONFIG 0x00
158 #define IT87_REG_ALARM1 0x01
159 #define IT87_REG_ALARM2 0x02
160 #define IT87_REG_ALARM3 0x03
162 /* The IT8718F and IT8720F have the VID value in a different register, in
163 Super-I/O configuration space. */
164 #define IT87_REG_VID 0x0a
165 /* The IT8705F and IT8712F earlier than revision 0x08 use register 0x0b
166 for fan divisors. Later IT8712F revisions must use 16-bit tachometer
168 #define IT87_REG_FAN_DIV 0x0b
169 #define IT87_REG_FAN_16BIT 0x0c
171 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
173 static const u8 IT87_REG_FAN[] = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
174 static const u8 IT87_REG_FAN_MIN[] = { 0x10, 0x11, 0x12, 0x84, 0x86 };
175 static const u8 IT87_REG_FANX[] = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
176 static const u8 IT87_REG_FANX_MIN[] = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
177 #define IT87_REG_FAN_MAIN_CTRL 0x13
178 #define IT87_REG_FAN_CTL 0x14
179 #define IT87_REG_PWM(nr) (0x15 + (nr))
181 #define IT87_REG_VIN(nr) (0x20 + (nr))
182 #define IT87_REG_TEMP(nr) (0x29 + (nr))
184 #define IT87_REG_VIN_MAX(nr) (0x30 + (nr) * 2)
185 #define IT87_REG_VIN_MIN(nr) (0x31 + (nr) * 2)
186 #define IT87_REG_TEMP_HIGH(nr) (0x40 + (nr) * 2)
187 #define IT87_REG_TEMP_LOW(nr) (0x41 + (nr) * 2)
189 #define IT87_REG_VIN_ENABLE 0x50
190 #define IT87_REG_TEMP_ENABLE 0x51
191 #define IT87_REG_BEEP_ENABLE 0x5c
193 #define IT87_REG_CHIPID 0x58
195 #define IT87_REG_AUTO_TEMP(nr, i) (0x60 + (nr) * 8 + (i))
196 #define IT87_REG_AUTO_PWM(nr, i) (0x65 + (nr) * 8 + (i))
198 #define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8)/16),0,255))
199 #define IN_FROM_REG(val) ((val) * 16)
201 static inline u8 FAN_TO_REG(long rpm, int div)
205 rpm = SENSORS_LIMIT(rpm, 1, 1000000);
206 return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1,
210 static inline u16 FAN16_TO_REG(long rpm)
214 return SENSORS_LIMIT((1350000 + rpm) / (rpm * 2), 1, 0xfffe);
217 #define FAN_FROM_REG(val,div) ((val)==0?-1:(val)==255?0:1350000/((val)*(div)))
218 /* The divider is fixed to 2 in 16-bit mode */
219 #define FAN16_FROM_REG(val) ((val)==0?-1:(val)==0xffff?0:1350000/((val)*2))
221 #define TEMP_TO_REG(val) (SENSORS_LIMIT(((val)<0?(((val)-500)/1000):\
222 ((val)+500)/1000),-128,127))
223 #define TEMP_FROM_REG(val) ((val) * 1000)
225 #define PWM_TO_REG(val) ((val) >> 1)
226 #define PWM_FROM_REG(val) (((val)&0x7f) << 1)
228 static int DIV_TO_REG(int val)
231 while (answer < 7 && (val >>= 1))
235 #define DIV_FROM_REG(val) (1 << (val))
237 static const unsigned int pwm_freq[8] = {
249 struct it87_sio_data {
251 /* Values read from Super-I/O config space */
255 /* Features skipped based on config or DMI */
261 /* For each registered chip, we need to keep some data in memory.
262 The structure is dynamically allocated. */
264 struct device *hwmon_dev;
270 struct mutex update_lock;
271 char valid; /* !=0 if following fields are valid */
272 unsigned long last_updated; /* In jiffies */
274 u8 in[9]; /* Register value */
275 u8 in_max[8]; /* Register value */
276 u8 in_min[8]; /* Register value */
277 u8 has_fan; /* Bitfield, fans enabled */
278 u16 fan[5]; /* Register values, possibly combined */
279 u16 fan_min[5]; /* Register values, possibly combined */
280 s8 temp[3]; /* Register value */
281 s8 temp_high[3]; /* Register value */
282 s8 temp_low[3]; /* Register value */
283 u8 sensor; /* Register value */
284 u8 fan_div[3]; /* Register encoding, shifted right */
285 u8 vid; /* Register encoding, combined */
287 u32 alarms; /* Register encoding, combined */
288 u8 beeps; /* Register encoding */
289 u8 fan_main_ctrl; /* Register value */
290 u8 fan_ctl; /* Register value */
292 /* The following 3 arrays correspond to the same registers. The
293 * meaning of bits 6-0 depends on the value of bit 7, and we want
294 * to preserve settings on mode changes, so we have to track all
295 * values separately. */
296 u8 pwm_ctrl[3]; /* Register value */
297 u8 pwm_duty[3]; /* Manual PWM value set by user (bit 6-0) */
298 u8 pwm_temp_map[3]; /* PWM to temp. chan. mapping (bits 1-0) */
300 /* Automatic fan speed control registers */
301 u8 auto_pwm[3][4]; /* [nr][3] is hard-coded */
302 s8 auto_temp[3][5]; /* [nr][0] is point1_temp_hyst */
305 static inline int has_16bit_fans(const struct it87_data *data)
307 /* IT8705F Datasheet 0.4.1, 3h == Version G.
308 IT8712F Datasheet 0.9.1, section 8.3.5 indicates 8h == Version J.
309 These are the first revisions with 16bit tachometer support. */
310 return (data->type == it87 && data->revision >= 0x03)
311 || (data->type == it8712 && data->revision >= 0x08)
312 || data->type == it8716
313 || data->type == it8718
314 || data->type == it8720;
317 static inline int has_old_autopwm(const struct it87_data *data)
319 /* The old automatic fan speed control interface is implemented
320 by IT8705F chips up to revision F and IT8712F chips up to
322 return (data->type == it87 && data->revision < 0x03)
323 || (data->type == it8712 && data->revision < 0x08);
326 static int it87_probe(struct platform_device *pdev);
327 static int __devexit it87_remove(struct platform_device *pdev);
329 static int it87_read_value(struct it87_data *data, u8 reg);
330 static void it87_write_value(struct it87_data *data, u8 reg, u8 value);
331 static struct it87_data *it87_update_device(struct device *dev);
332 static int it87_check_pwm(struct device *dev);
333 static void it87_init_device(struct platform_device *pdev);
336 static struct platform_driver it87_driver = {
338 .owner = THIS_MODULE,
342 .remove = __devexit_p(it87_remove),
345 static ssize_t show_in(struct device *dev, struct device_attribute *attr,
348 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
349 int nr = sensor_attr->index;
351 struct it87_data *data = it87_update_device(dev);
352 return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
355 static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
358 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
359 int nr = sensor_attr->index;
361 struct it87_data *data = it87_update_device(dev);
362 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
365 static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
368 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
369 int nr = sensor_attr->index;
371 struct it87_data *data = it87_update_device(dev);
372 return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
375 static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
376 const char *buf, size_t count)
378 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
379 int nr = sensor_attr->index;
381 struct it87_data *data = dev_get_drvdata(dev);
384 if (strict_strtoul(buf, 10, &val) < 0)
387 mutex_lock(&data->update_lock);
388 data->in_min[nr] = IN_TO_REG(val);
389 it87_write_value(data, IT87_REG_VIN_MIN(nr),
391 mutex_unlock(&data->update_lock);
394 static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
395 const char *buf, size_t count)
397 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
398 int nr = sensor_attr->index;
400 struct it87_data *data = dev_get_drvdata(dev);
403 if (strict_strtoul(buf, 10, &val) < 0)
406 mutex_lock(&data->update_lock);
407 data->in_max[nr] = IN_TO_REG(val);
408 it87_write_value(data, IT87_REG_VIN_MAX(nr),
410 mutex_unlock(&data->update_lock);
414 #define show_in_offset(offset) \
415 static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
416 show_in, NULL, offset);
418 #define limit_in_offset(offset) \
419 static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
420 show_in_min, set_in_min, offset); \
421 static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
422 show_in_max, set_in_max, offset);
443 static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
446 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
447 int nr = sensor_attr->index;
449 struct it87_data *data = it87_update_device(dev);
450 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
452 static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
455 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
456 int nr = sensor_attr->index;
458 struct it87_data *data = it87_update_device(dev);
459 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_high[nr]));
461 static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
464 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
465 int nr = sensor_attr->index;
467 struct it87_data *data = it87_update_device(dev);
468 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_low[nr]));
470 static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
471 const char *buf, size_t count)
473 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
474 int nr = sensor_attr->index;
476 struct it87_data *data = dev_get_drvdata(dev);
479 if (strict_strtol(buf, 10, &val) < 0)
482 mutex_lock(&data->update_lock);
483 data->temp_high[nr] = TEMP_TO_REG(val);
484 it87_write_value(data, IT87_REG_TEMP_HIGH(nr), data->temp_high[nr]);
485 mutex_unlock(&data->update_lock);
488 static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
489 const char *buf, size_t count)
491 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
492 int nr = sensor_attr->index;
494 struct it87_data *data = dev_get_drvdata(dev);
497 if (strict_strtol(buf, 10, &val) < 0)
500 mutex_lock(&data->update_lock);
501 data->temp_low[nr] = TEMP_TO_REG(val);
502 it87_write_value(data, IT87_REG_TEMP_LOW(nr), data->temp_low[nr]);
503 mutex_unlock(&data->update_lock);
506 #define show_temp_offset(offset) \
507 static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
508 show_temp, NULL, offset - 1); \
509 static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
510 show_temp_max, set_temp_max, offset - 1); \
511 static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
512 show_temp_min, set_temp_min, offset - 1);
518 static ssize_t show_sensor(struct device *dev, struct device_attribute *attr,
521 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
522 int nr = sensor_attr->index;
524 struct it87_data *data = it87_update_device(dev);
525 u8 reg = data->sensor; /* In case the value is updated while
529 return sprintf(buf, "3\n"); /* thermal diode */
531 return sprintf(buf, "4\n"); /* thermistor */
532 return sprintf(buf, "0\n"); /* disabled */
534 static ssize_t set_sensor(struct device *dev, struct device_attribute *attr,
535 const char *buf, size_t count)
537 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
538 int nr = sensor_attr->index;
540 struct it87_data *data = dev_get_drvdata(dev);
543 if (strict_strtol(buf, 10, &val) < 0)
546 mutex_lock(&data->update_lock);
548 data->sensor &= ~(1 << nr);
549 data->sensor &= ~(8 << nr);
550 if (val == 2) { /* backwards compatibility */
551 dev_warn(dev, "Sensor type 2 is deprecated, please use 4 "
555 /* 3 = thermal diode; 4 = thermistor; 0 = disabled */
557 data->sensor |= 1 << nr;
559 data->sensor |= 8 << nr;
561 mutex_unlock(&data->update_lock);
564 it87_write_value(data, IT87_REG_TEMP_ENABLE, data->sensor);
565 mutex_unlock(&data->update_lock);
568 #define show_sensor_offset(offset) \
569 static SENSOR_DEVICE_ATTR(temp##offset##_type, S_IRUGO | S_IWUSR, \
570 show_sensor, set_sensor, offset - 1);
572 show_sensor_offset(1);
573 show_sensor_offset(2);
574 show_sensor_offset(3);
578 static int pwm_mode(const struct it87_data *data, int nr)
580 int ctrl = data->fan_main_ctrl & (1 << nr);
582 if (ctrl == 0) /* Full speed */
584 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
586 else /* Manual mode */
590 static ssize_t show_fan(struct device *dev, struct device_attribute *attr,
593 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
594 int nr = sensor_attr->index;
596 struct it87_data *data = it87_update_device(dev);
597 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
598 DIV_FROM_REG(data->fan_div[nr])));
600 static ssize_t show_fan_min(struct device *dev, struct device_attribute *attr,
603 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
604 int nr = sensor_attr->index;
606 struct it87_data *data = it87_update_device(dev);
607 return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
608 DIV_FROM_REG(data->fan_div[nr])));
610 static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
613 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
614 int nr = sensor_attr->index;
616 struct it87_data *data = it87_update_device(dev);
617 return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
619 static ssize_t show_pwm_enable(struct device *dev,
620 struct device_attribute *attr, char *buf)
622 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
623 int nr = sensor_attr->index;
625 struct it87_data *data = it87_update_device(dev);
626 return sprintf(buf, "%d\n", pwm_mode(data, nr));
628 static ssize_t show_pwm(struct device *dev, struct device_attribute *attr,
631 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
632 int nr = sensor_attr->index;
634 struct it87_data *data = it87_update_device(dev);
635 return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm_duty[nr]));
637 static ssize_t show_pwm_freq(struct device *dev, struct device_attribute *attr,
640 struct it87_data *data = it87_update_device(dev);
641 int index = (data->fan_ctl >> 4) & 0x07;
643 return sprintf(buf, "%u\n", pwm_freq[index]);
645 static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
646 const char *buf, size_t count)
648 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
649 int nr = sensor_attr->index;
651 struct it87_data *data = dev_get_drvdata(dev);
655 if (strict_strtol(buf, 10, &val) < 0)
658 mutex_lock(&data->update_lock);
659 reg = it87_read_value(data, IT87_REG_FAN_DIV);
662 data->fan_div[nr] = reg & 0x07;
665 data->fan_div[nr] = (reg >> 3) & 0x07;
668 data->fan_div[nr] = (reg & 0x40) ? 3 : 1;
672 data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
673 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
674 mutex_unlock(&data->update_lock);
677 static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
678 const char *buf, size_t count)
680 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
681 int nr = sensor_attr->index;
683 struct it87_data *data = dev_get_drvdata(dev);
688 if (strict_strtoul(buf, 10, &val) < 0)
691 mutex_lock(&data->update_lock);
692 old = it87_read_value(data, IT87_REG_FAN_DIV);
694 /* Save fan min limit */
695 min = FAN_FROM_REG(data->fan_min[nr], DIV_FROM_REG(data->fan_div[nr]));
700 data->fan_div[nr] = DIV_TO_REG(val);
704 data->fan_div[nr] = 1;
706 data->fan_div[nr] = 3;
709 val |= (data->fan_div[0] & 0x07);
710 val |= (data->fan_div[1] & 0x07) << 3;
711 if (data->fan_div[2] == 3)
713 it87_write_value(data, IT87_REG_FAN_DIV, val);
715 /* Restore fan min limit */
716 data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
717 it87_write_value(data, IT87_REG_FAN_MIN[nr], data->fan_min[nr]);
719 mutex_unlock(&data->update_lock);
722 static ssize_t set_pwm_enable(struct device *dev,
723 struct device_attribute *attr, const char *buf, size_t count)
725 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
726 int nr = sensor_attr->index;
728 struct it87_data *data = dev_get_drvdata(dev);
731 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 2)
734 mutex_lock(&data->update_lock);
738 /* make sure the fan is on when in on/off mode */
739 tmp = it87_read_value(data, IT87_REG_FAN_CTL);
740 it87_write_value(data, IT87_REG_FAN_CTL, tmp | (1 << nr));
741 /* set on/off mode */
742 data->fan_main_ctrl &= ~(1 << nr);
743 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
744 data->fan_main_ctrl);
746 if (val == 1) /* Manual mode */
747 data->pwm_ctrl[nr] = data->pwm_duty[nr];
748 else /* Automatic mode */
749 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
750 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
751 /* set SmartGuardian mode */
752 data->fan_main_ctrl |= (1 << nr);
753 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
754 data->fan_main_ctrl);
757 mutex_unlock(&data->update_lock);
760 static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
761 const char *buf, size_t count)
763 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
764 int nr = sensor_attr->index;
766 struct it87_data *data = dev_get_drvdata(dev);
769 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
772 mutex_lock(&data->update_lock);
773 data->pwm_duty[nr] = PWM_TO_REG(val);
774 /* If we are in manual mode, write the duty cycle immediately;
775 * otherwise, just store it for later use. */
776 if (!(data->pwm_ctrl[nr] & 0x80)) {
777 data->pwm_ctrl[nr] = data->pwm_duty[nr];
778 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
780 mutex_unlock(&data->update_lock);
783 static ssize_t set_pwm_freq(struct device *dev,
784 struct device_attribute *attr, const char *buf, size_t count)
786 struct it87_data *data = dev_get_drvdata(dev);
790 if (strict_strtoul(buf, 10, &val) < 0)
793 /* Search for the nearest available frequency */
794 for (i = 0; i < 7; i++) {
795 if (val > (pwm_freq[i] + pwm_freq[i+1]) / 2)
799 mutex_lock(&data->update_lock);
800 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL) & 0x8f;
801 data->fan_ctl |= i << 4;
802 it87_write_value(data, IT87_REG_FAN_CTL, data->fan_ctl);
803 mutex_unlock(&data->update_lock);
807 static ssize_t show_pwm_temp_map(struct device *dev,
808 struct device_attribute *attr, char *buf)
810 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
811 int nr = sensor_attr->index;
813 struct it87_data *data = it87_update_device(dev);
816 if (data->pwm_temp_map[nr] < 3)
817 map = 1 << data->pwm_temp_map[nr];
819 map = 0; /* Should never happen */
820 return sprintf(buf, "%d\n", map);
822 static ssize_t set_pwm_temp_map(struct device *dev,
823 struct device_attribute *attr, const char *buf, size_t count)
825 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
826 int nr = sensor_attr->index;
828 struct it87_data *data = dev_get_drvdata(dev);
832 /* This check can go away if we ever support automatic fan speed
833 control on newer chips. */
834 if (!has_old_autopwm(data)) {
835 dev_notice(dev, "Mapping change disabled for safety reasons\n");
839 if (strict_strtol(buf, 10, &val) < 0)
856 mutex_lock(&data->update_lock);
857 data->pwm_temp_map[nr] = reg;
858 /* If we are in automatic mode, write the temp mapping immediately;
859 * otherwise, just store it for later use. */
860 if (data->pwm_ctrl[nr] & 0x80) {
861 data->pwm_ctrl[nr] = 0x80 | data->pwm_temp_map[nr];
862 it87_write_value(data, IT87_REG_PWM(nr), data->pwm_ctrl[nr]);
864 mutex_unlock(&data->update_lock);
868 static ssize_t show_auto_pwm(struct device *dev,
869 struct device_attribute *attr, char *buf)
871 struct it87_data *data = it87_update_device(dev);
872 struct sensor_device_attribute_2 *sensor_attr =
873 to_sensor_dev_attr_2(attr);
874 int nr = sensor_attr->nr;
875 int point = sensor_attr->index;
877 return sprintf(buf, "%d\n", PWM_FROM_REG(data->auto_pwm[nr][point]));
880 static ssize_t set_auto_pwm(struct device *dev,
881 struct device_attribute *attr, const char *buf, size_t count)
883 struct it87_data *data = dev_get_drvdata(dev);
884 struct sensor_device_attribute_2 *sensor_attr =
885 to_sensor_dev_attr_2(attr);
886 int nr = sensor_attr->nr;
887 int point = sensor_attr->index;
890 if (strict_strtol(buf, 10, &val) < 0 || val < 0 || val > 255)
893 mutex_lock(&data->update_lock);
894 data->auto_pwm[nr][point] = PWM_TO_REG(val);
895 it87_write_value(data, IT87_REG_AUTO_PWM(nr, point),
896 data->auto_pwm[nr][point]);
897 mutex_unlock(&data->update_lock);
901 static ssize_t show_auto_temp(struct device *dev,
902 struct device_attribute *attr, char *buf)
904 struct it87_data *data = it87_update_device(dev);
905 struct sensor_device_attribute_2 *sensor_attr =
906 to_sensor_dev_attr_2(attr);
907 int nr = sensor_attr->nr;
908 int point = sensor_attr->index;
910 return sprintf(buf, "%d\n", TEMP_FROM_REG(data->auto_temp[nr][point]));
913 static ssize_t set_auto_temp(struct device *dev,
914 struct device_attribute *attr, const char *buf, size_t count)
916 struct it87_data *data = dev_get_drvdata(dev);
917 struct sensor_device_attribute_2 *sensor_attr =
918 to_sensor_dev_attr_2(attr);
919 int nr = sensor_attr->nr;
920 int point = sensor_attr->index;
923 if (strict_strtol(buf, 10, &val) < 0 || val < -128000 || val > 127000)
926 mutex_lock(&data->update_lock);
927 data->auto_temp[nr][point] = TEMP_TO_REG(val);
928 it87_write_value(data, IT87_REG_AUTO_TEMP(nr, point),
929 data->auto_temp[nr][point]);
930 mutex_unlock(&data->update_lock);
934 #define show_fan_offset(offset) \
935 static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
936 show_fan, NULL, offset - 1); \
937 static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
938 show_fan_min, set_fan_min, offset - 1); \
939 static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
940 show_fan_div, set_fan_div, offset - 1);
946 #define show_pwm_offset(offset) \
947 static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
948 show_pwm_enable, set_pwm_enable, offset - 1); \
949 static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
950 show_pwm, set_pwm, offset - 1); \
951 static DEVICE_ATTR(pwm##offset##_freq, \
952 (offset == 1 ? S_IRUGO | S_IWUSR : S_IRUGO), \
953 show_pwm_freq, (offset == 1 ? set_pwm_freq : NULL)); \
954 static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels_temp, \
955 S_IRUGO | S_IWUSR, show_pwm_temp_map, set_pwm_temp_map, \
957 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_pwm, \
958 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
960 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_pwm, \
961 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
963 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_pwm, \
964 S_IRUGO | S_IWUSR, show_auto_pwm, set_auto_pwm, \
966 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_pwm, \
967 S_IRUGO, show_auto_pwm, NULL, offset - 1, 3); \
968 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp, \
969 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
971 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point1_temp_hyst, \
972 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
974 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point2_temp, \
975 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
977 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point3_temp, \
978 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
980 static SENSOR_DEVICE_ATTR_2(pwm##offset##_auto_point4_temp, \
981 S_IRUGO | S_IWUSR, show_auto_temp, set_auto_temp, \
988 /* A different set of callbacks for 16-bit fans */
989 static ssize_t show_fan16(struct device *dev, struct device_attribute *attr,
992 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
993 int nr = sensor_attr->index;
994 struct it87_data *data = it87_update_device(dev);
995 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan[nr]));
998 static ssize_t show_fan16_min(struct device *dev, struct device_attribute *attr,
1001 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1002 int nr = sensor_attr->index;
1003 struct it87_data *data = it87_update_device(dev);
1004 return sprintf(buf, "%d\n", FAN16_FROM_REG(data->fan_min[nr]));
1007 static ssize_t set_fan16_min(struct device *dev, struct device_attribute *attr,
1008 const char *buf, size_t count)
1010 struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
1011 int nr = sensor_attr->index;
1012 struct it87_data *data = dev_get_drvdata(dev);
1015 if (strict_strtol(buf, 10, &val) < 0)
1018 mutex_lock(&data->update_lock);
1019 data->fan_min[nr] = FAN16_TO_REG(val);
1020 it87_write_value(data, IT87_REG_FAN_MIN[nr],
1021 data->fan_min[nr] & 0xff);
1022 it87_write_value(data, IT87_REG_FANX_MIN[nr],
1023 data->fan_min[nr] >> 8);
1024 mutex_unlock(&data->update_lock);
1028 /* We want to use the same sysfs file names as 8-bit fans, but we need
1029 different variable names, so we have to use SENSOR_ATTR instead of
1030 SENSOR_DEVICE_ATTR. */
1031 #define show_fan16_offset(offset) \
1032 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_input16 \
1033 = SENSOR_ATTR(fan##offset##_input, S_IRUGO, \
1034 show_fan16, NULL, offset - 1); \
1035 static struct sensor_device_attribute sensor_dev_attr_fan##offset##_min16 \
1036 = SENSOR_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
1037 show_fan16_min, set_fan16_min, offset - 1)
1039 show_fan16_offset(1);
1040 show_fan16_offset(2);
1041 show_fan16_offset(3);
1042 show_fan16_offset(4);
1043 show_fan16_offset(5);
1046 static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
1049 struct it87_data *data = it87_update_device(dev);
1050 return sprintf(buf, "%u\n", data->alarms);
1052 static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
1054 static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
1057 int bitnr = to_sensor_dev_attr(attr)->index;
1058 struct it87_data *data = it87_update_device(dev);
1059 return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
1061 static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 8);
1062 static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 9);
1063 static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 10);
1064 static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 11);
1065 static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 12);
1066 static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 13);
1067 static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 14);
1068 static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 15);
1069 static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
1070 static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
1071 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
1072 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
1073 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
1074 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
1075 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
1076 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
1078 static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
1081 int bitnr = to_sensor_dev_attr(attr)->index;
1082 struct it87_data *data = it87_update_device(dev);
1083 return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
1085 static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
1086 const char *buf, size_t count)
1088 int bitnr = to_sensor_dev_attr(attr)->index;
1089 struct it87_data *data = dev_get_drvdata(dev);
1092 if (strict_strtol(buf, 10, &val) < 0
1093 || (val != 0 && val != 1))
1096 mutex_lock(&data->update_lock);
1097 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1099 data->beeps |= (1 << bitnr);
1101 data->beeps &= ~(1 << bitnr);
1102 it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
1103 mutex_unlock(&data->update_lock);
1107 static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
1108 show_beep, set_beep, 1);
1109 static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
1110 static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
1111 static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
1112 static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
1113 static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
1114 static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
1115 static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
1116 /* fanX_beep writability is set later */
1117 static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
1118 static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
1119 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
1120 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
1121 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
1122 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
1123 show_beep, set_beep, 2);
1124 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
1125 static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
1127 static ssize_t show_vrm_reg(struct device *dev, struct device_attribute *attr,
1130 struct it87_data *data = dev_get_drvdata(dev);
1131 return sprintf(buf, "%u\n", data->vrm);
1133 static ssize_t store_vrm_reg(struct device *dev, struct device_attribute *attr,
1134 const char *buf, size_t count)
1136 struct it87_data *data = dev_get_drvdata(dev);
1139 if (strict_strtoul(buf, 10, &val) < 0)
1146 static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm_reg, store_vrm_reg);
1148 static ssize_t show_vid_reg(struct device *dev, struct device_attribute *attr,
1151 struct it87_data *data = it87_update_device(dev);
1152 return sprintf(buf, "%ld\n", (long) vid_from_reg(data->vid, data->vrm));
1154 static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid_reg, NULL);
1156 static ssize_t show_name(struct device *dev, struct device_attribute
1157 *devattr, char *buf)
1159 struct it87_data *data = dev_get_drvdata(dev);
1160 return sprintf(buf, "%s\n", data->name);
1162 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
1164 static struct attribute *it87_attributes[] = {
1165 &sensor_dev_attr_in0_input.dev_attr.attr,
1166 &sensor_dev_attr_in1_input.dev_attr.attr,
1167 &sensor_dev_attr_in2_input.dev_attr.attr,
1168 &sensor_dev_attr_in3_input.dev_attr.attr,
1169 &sensor_dev_attr_in4_input.dev_attr.attr,
1170 &sensor_dev_attr_in5_input.dev_attr.attr,
1171 &sensor_dev_attr_in6_input.dev_attr.attr,
1172 &sensor_dev_attr_in7_input.dev_attr.attr,
1173 &sensor_dev_attr_in8_input.dev_attr.attr,
1174 &sensor_dev_attr_in0_min.dev_attr.attr,
1175 &sensor_dev_attr_in1_min.dev_attr.attr,
1176 &sensor_dev_attr_in2_min.dev_attr.attr,
1177 &sensor_dev_attr_in3_min.dev_attr.attr,
1178 &sensor_dev_attr_in4_min.dev_attr.attr,
1179 &sensor_dev_attr_in5_min.dev_attr.attr,
1180 &sensor_dev_attr_in6_min.dev_attr.attr,
1181 &sensor_dev_attr_in7_min.dev_attr.attr,
1182 &sensor_dev_attr_in0_max.dev_attr.attr,
1183 &sensor_dev_attr_in1_max.dev_attr.attr,
1184 &sensor_dev_attr_in2_max.dev_attr.attr,
1185 &sensor_dev_attr_in3_max.dev_attr.attr,
1186 &sensor_dev_attr_in4_max.dev_attr.attr,
1187 &sensor_dev_attr_in5_max.dev_attr.attr,
1188 &sensor_dev_attr_in6_max.dev_attr.attr,
1189 &sensor_dev_attr_in7_max.dev_attr.attr,
1190 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1191 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1192 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1193 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1194 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1195 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1196 &sensor_dev_attr_in6_alarm.dev_attr.attr,
1197 &sensor_dev_attr_in7_alarm.dev_attr.attr,
1199 &sensor_dev_attr_temp1_input.dev_attr.attr,
1200 &sensor_dev_attr_temp2_input.dev_attr.attr,
1201 &sensor_dev_attr_temp3_input.dev_attr.attr,
1202 &sensor_dev_attr_temp1_max.dev_attr.attr,
1203 &sensor_dev_attr_temp2_max.dev_attr.attr,
1204 &sensor_dev_attr_temp3_max.dev_attr.attr,
1205 &sensor_dev_attr_temp1_min.dev_attr.attr,
1206 &sensor_dev_attr_temp2_min.dev_attr.attr,
1207 &sensor_dev_attr_temp3_min.dev_attr.attr,
1208 &sensor_dev_attr_temp1_type.dev_attr.attr,
1209 &sensor_dev_attr_temp2_type.dev_attr.attr,
1210 &sensor_dev_attr_temp3_type.dev_attr.attr,
1211 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1212 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1213 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1215 &dev_attr_alarms.attr,
1216 &dev_attr_name.attr,
1220 static const struct attribute_group it87_group = {
1221 .attrs = it87_attributes,
1224 static struct attribute *it87_attributes_beep[] = {
1225 &sensor_dev_attr_in0_beep.dev_attr.attr,
1226 &sensor_dev_attr_in1_beep.dev_attr.attr,
1227 &sensor_dev_attr_in2_beep.dev_attr.attr,
1228 &sensor_dev_attr_in3_beep.dev_attr.attr,
1229 &sensor_dev_attr_in4_beep.dev_attr.attr,
1230 &sensor_dev_attr_in5_beep.dev_attr.attr,
1231 &sensor_dev_attr_in6_beep.dev_attr.attr,
1232 &sensor_dev_attr_in7_beep.dev_attr.attr,
1234 &sensor_dev_attr_temp1_beep.dev_attr.attr,
1235 &sensor_dev_attr_temp2_beep.dev_attr.attr,
1236 &sensor_dev_attr_temp3_beep.dev_attr.attr,
1240 static const struct attribute_group it87_group_beep = {
1241 .attrs = it87_attributes_beep,
1244 static struct attribute *it87_attributes_fan16[5][3+1] = { {
1245 &sensor_dev_attr_fan1_input16.dev_attr.attr,
1246 &sensor_dev_attr_fan1_min16.dev_attr.attr,
1247 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1250 &sensor_dev_attr_fan2_input16.dev_attr.attr,
1251 &sensor_dev_attr_fan2_min16.dev_attr.attr,
1252 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1255 &sensor_dev_attr_fan3_input16.dev_attr.attr,
1256 &sensor_dev_attr_fan3_min16.dev_attr.attr,
1257 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1260 &sensor_dev_attr_fan4_input16.dev_attr.attr,
1261 &sensor_dev_attr_fan4_min16.dev_attr.attr,
1262 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1265 &sensor_dev_attr_fan5_input16.dev_attr.attr,
1266 &sensor_dev_attr_fan5_min16.dev_attr.attr,
1267 &sensor_dev_attr_fan5_alarm.dev_attr.attr,
1271 static const struct attribute_group it87_group_fan16[5] = {
1272 { .attrs = it87_attributes_fan16[0] },
1273 { .attrs = it87_attributes_fan16[1] },
1274 { .attrs = it87_attributes_fan16[2] },
1275 { .attrs = it87_attributes_fan16[3] },
1276 { .attrs = it87_attributes_fan16[4] },
1279 static struct attribute *it87_attributes_fan[3][4+1] = { {
1280 &sensor_dev_attr_fan1_input.dev_attr.attr,
1281 &sensor_dev_attr_fan1_min.dev_attr.attr,
1282 &sensor_dev_attr_fan1_div.dev_attr.attr,
1283 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1286 &sensor_dev_attr_fan2_input.dev_attr.attr,
1287 &sensor_dev_attr_fan2_min.dev_attr.attr,
1288 &sensor_dev_attr_fan2_div.dev_attr.attr,
1289 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1292 &sensor_dev_attr_fan3_input.dev_attr.attr,
1293 &sensor_dev_attr_fan3_min.dev_attr.attr,
1294 &sensor_dev_attr_fan3_div.dev_attr.attr,
1295 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1299 static const struct attribute_group it87_group_fan[3] = {
1300 { .attrs = it87_attributes_fan[0] },
1301 { .attrs = it87_attributes_fan[1] },
1302 { .attrs = it87_attributes_fan[2] },
1305 static const struct attribute_group *
1306 it87_get_fan_group(const struct it87_data *data)
1308 return has_16bit_fans(data) ? it87_group_fan16 : it87_group_fan;
1311 static struct attribute *it87_attributes_pwm[3][4+1] = { {
1312 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1313 &sensor_dev_attr_pwm1.dev_attr.attr,
1314 &dev_attr_pwm1_freq.attr,
1315 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1318 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1319 &sensor_dev_attr_pwm2.dev_attr.attr,
1320 &dev_attr_pwm2_freq.attr,
1321 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1324 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1325 &sensor_dev_attr_pwm3.dev_attr.attr,
1326 &dev_attr_pwm3_freq.attr,
1327 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1331 static const struct attribute_group it87_group_pwm[3] = {
1332 { .attrs = it87_attributes_pwm[0] },
1333 { .attrs = it87_attributes_pwm[1] },
1334 { .attrs = it87_attributes_pwm[2] },
1337 static struct attribute *it87_attributes_autopwm[3][9+1] = { {
1338 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1339 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1340 &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
1341 &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
1342 &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
1343 &sensor_dev_attr_pwm1_auto_point1_temp_hyst.dev_attr.attr,
1344 &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
1345 &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
1346 &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
1349 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1350 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1351 &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
1352 &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
1353 &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
1354 &sensor_dev_attr_pwm2_auto_point1_temp_hyst.dev_attr.attr,
1355 &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
1356 &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
1357 &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
1360 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1361 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1362 &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
1363 &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
1364 &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
1365 &sensor_dev_attr_pwm3_auto_point1_temp_hyst.dev_attr.attr,
1366 &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
1367 &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
1368 &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
1372 static const struct attribute_group it87_group_autopwm[3] = {
1373 { .attrs = it87_attributes_autopwm[0] },
1374 { .attrs = it87_attributes_autopwm[1] },
1375 { .attrs = it87_attributes_autopwm[2] },
1378 static struct attribute *it87_attributes_fan_beep[] = {
1379 &sensor_dev_attr_fan1_beep.dev_attr.attr,
1380 &sensor_dev_attr_fan2_beep.dev_attr.attr,
1381 &sensor_dev_attr_fan3_beep.dev_attr.attr,
1382 &sensor_dev_attr_fan4_beep.dev_attr.attr,
1383 &sensor_dev_attr_fan5_beep.dev_attr.attr,
1386 static struct attribute *it87_attributes_vid[] = {
1388 &dev_attr_cpu0_vid.attr,
1392 static const struct attribute_group it87_group_vid = {
1393 .attrs = it87_attributes_vid,
1396 /* SuperIO detection - will change isa_address if a chip is found */
1397 static int __init it87_find(unsigned short *address,
1398 struct it87_sio_data *sio_data)
1402 const char *board_vendor, *board_name;
1405 chip_type = force_id ? force_id : superio_inw(DEVID);
1407 switch (chip_type) {
1409 sio_data->type = it87;
1412 sio_data->type = it8712;
1416 sio_data->type = it8716;
1419 sio_data->type = it8718;
1422 sio_data->type = it8720;
1424 case 0xffff: /* No device at all */
1427 pr_debug(DRVNAME ": Unsupported chip (DEVID=0x%x)\n",
1432 superio_select(PME);
1433 if (!(superio_inb(IT87_ACT_REG) & 0x01)) {
1434 pr_info("it87: Device not activated, skipping\n");
1438 *address = superio_inw(IT87_BASE_REG) & ~(IT87_EXTENT - 1);
1439 if (*address == 0) {
1440 pr_info("it87: Base address not set, skipping\n");
1445 sio_data->revision = superio_inb(DEVREV) & 0x0f;
1446 pr_info("it87: Found IT%04xF chip at 0x%x, revision %d\n",
1447 chip_type, *address, sio_data->revision);
1449 /* Read GPIO config and VID value from LDN 7 (GPIO) */
1450 if (sio_data->type == it87) {
1451 /* The IT8705F doesn't have VID pins at all */
1452 sio_data->skip_vid = 1;
1454 /* The IT8705F has a different LD number for GPIO */
1456 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1460 superio_select(GPIO);
1461 /* We need at least 4 VID pins */
1462 reg = superio_inb(IT87_SIO_GPIO3_REG);
1464 pr_info("it87: VID is disabled (pins used for GPIO)\n");
1465 sio_data->skip_vid = 1;
1468 /* Check if fan3 is there or not */
1470 sio_data->skip_pwm |= (1 << 2);
1472 sio_data->skip_fan |= (1 << 2);
1474 /* Check if fan2 is there or not */
1475 reg = superio_inb(IT87_SIO_GPIO5_REG);
1477 sio_data->skip_pwm |= (1 << 1);
1479 sio_data->skip_fan |= (1 << 1);
1481 if ((sio_data->type == it8718 || sio_data->type == it8720)
1482 && !(sio_data->skip_vid))
1483 sio_data->vid_value = superio_inb(IT87_SIO_VID_REG);
1485 reg = superio_inb(IT87_SIO_PINX2_REG);
1487 pr_info("it87: in3 is VCC (+5V)\n");
1489 pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
1491 sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
1493 if (sio_data->beep_pin)
1494 pr_info("it87: Beeping is supported\n");
1496 /* Disable specific features based on DMI strings */
1497 board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
1498 board_name = dmi_get_system_info(DMI_BOARD_NAME);
1499 if (board_vendor && board_name) {
1500 if (strcmp(board_vendor, "nVIDIA") == 0
1501 && strcmp(board_name, "FN68PT") == 0) {
1502 /* On the Shuttle SN68PT, FAN_CTL2 is apparently not
1503 connected to a fan, but to something else. One user
1504 has reported instant system power-off when changing
1505 the PWM2 duty cycle, so we disable it.
1506 I use the board name string as the trigger in case
1507 the same board is ever used in other systems. */
1508 pr_info("it87: Disabling pwm2 due to "
1509 "hardware constraints\n");
1510 sio_data->skip_pwm = (1 << 1);
1519 static void it87_remove_files(struct device *dev)
1521 struct it87_data *data = platform_get_drvdata(pdev);
1522 struct it87_sio_data *sio_data = dev->platform_data;
1523 const struct attribute_group *fan_group = it87_get_fan_group(data);
1526 sysfs_remove_group(&dev->kobj, &it87_group);
1527 if (sio_data->beep_pin)
1528 sysfs_remove_group(&dev->kobj, &it87_group_beep);
1529 for (i = 0; i < 5; i++) {
1530 if (!(data->has_fan & (1 << i)))
1532 sysfs_remove_group(&dev->kobj, &fan_group[i]);
1533 if (sio_data->beep_pin)
1534 sysfs_remove_file(&dev->kobj,
1535 it87_attributes_fan_beep[i]);
1537 for (i = 0; i < 3; i++) {
1538 if (sio_data->skip_pwm & (1 << 0))
1540 sysfs_remove_group(&dev->kobj, &it87_group_pwm[i]);
1541 if (has_old_autopwm(data))
1542 sysfs_remove_group(&dev->kobj,
1543 &it87_group_autopwm[i]);
1545 if (!sio_data->skip_vid)
1546 sysfs_remove_group(&dev->kobj, &it87_group_vid);
1549 static int __devinit it87_probe(struct platform_device *pdev)
1551 struct it87_data *data;
1552 struct resource *res;
1553 struct device *dev = &pdev->dev;
1554 struct it87_sio_data *sio_data = dev->platform_data;
1555 const struct attribute_group *fan_group;
1557 int enable_pwm_interface;
1558 int fan_beep_need_rw;
1559 static const char *names[] = {
1567 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
1568 if (!request_region(res->start, IT87_EC_EXTENT, DRVNAME)) {
1569 dev_err(dev, "Failed to request region 0x%lx-0x%lx\n",
1570 (unsigned long)res->start,
1571 (unsigned long)(res->start + IT87_EC_EXTENT - 1));
1576 data = kzalloc(sizeof(struct it87_data), GFP_KERNEL);
1582 data->addr = res->start;
1583 data->type = sio_data->type;
1584 data->revision = sio_data->revision;
1585 data->name = names[sio_data->type];
1587 /* Now, we do the remaining detection. */
1588 if ((it87_read_value(data, IT87_REG_CONFIG) & 0x80)
1589 || it87_read_value(data, IT87_REG_CHIPID) != 0x90) {
1594 platform_set_drvdata(pdev, data);
1596 mutex_init(&data->update_lock);
1598 /* Check PWM configuration */
1599 enable_pwm_interface = it87_check_pwm(dev);
1601 /* Initialize the IT87 chip */
1602 it87_init_device(pdev);
1604 /* Register sysfs hooks */
1605 err = sysfs_create_group(&dev->kobj, &it87_group);
1609 if (sio_data->beep_pin) {
1610 err = sysfs_create_group(&dev->kobj, &it87_group_beep);
1615 /* Do not create fan files for disabled fans */
1616 fan_group = it87_get_fan_group(data);
1617 fan_beep_need_rw = 1;
1618 for (i = 0; i < 5; i++) {
1619 if (!(data->has_fan & (1 << i)))
1621 err = sysfs_create_group(&dev->kobj, &fan_group[i]);
1625 if (sio_data->beep_pin) {
1626 err = sysfs_create_file(&dev->kobj,
1627 it87_attributes_fan_beep[i]);
1630 if (!fan_beep_need_rw)
1633 /* As we have a single beep enable bit for all fans,
1634 * only the first enabled fan has a writable attribute
1636 if (sysfs_chmod_file(&dev->kobj,
1637 it87_attributes_fan_beep[i],
1639 dev_dbg(dev, "chmod +w fan%d_beep failed\n",
1641 fan_beep_need_rw = 0;
1645 if (enable_pwm_interface) {
1646 for (i = 0; i < 3; i++) {
1647 if (sio_data->skip_pwm & (1 << i))
1649 err = sysfs_create_group(&dev->kobj,
1650 &it87_group_pwm[i]);
1654 if (!has_old_autopwm(data))
1656 err = sysfs_create_group(&dev->kobj,
1657 &it87_group_autopwm[i]);
1663 if (!sio_data->skip_vid) {
1664 data->vrm = vid_which_vrm();
1665 /* VID reading from Super-I/O config space if available */
1666 data->vid = sio_data->vid_value;
1667 err = sysfs_create_group(&dev->kobj, &it87_group_vid);
1672 data->hwmon_dev = hwmon_device_register(dev);
1673 if (IS_ERR(data->hwmon_dev)) {
1674 err = PTR_ERR(data->hwmon_dev);
1681 it87_remove_files(dev);
1683 platform_set_drvdata(pdev, NULL);
1686 release_region(res->start, IT87_EC_EXTENT);
1691 static int __devexit it87_remove(struct platform_device *pdev)
1693 struct it87_data *data = platform_get_drvdata(pdev);
1695 hwmon_device_unregister(data->hwmon_dev);
1696 it87_remove_files(&pdev->dev);
1698 release_region(data->addr, IT87_EC_EXTENT);
1699 platform_set_drvdata(pdev, NULL);
1705 /* Must be called with data->update_lock held, except during initialization.
1706 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1707 would slow down the IT87 access and should not be necessary. */
1708 static int it87_read_value(struct it87_data *data, u8 reg)
1710 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1711 return inb_p(data->addr + IT87_DATA_REG_OFFSET);
1714 /* Must be called with data->update_lock held, except during initialization.
1715 We ignore the IT87 BUSY flag at this moment - it could lead to deadlocks,
1716 would slow down the IT87 access and should not be necessary. */
1717 static void it87_write_value(struct it87_data *data, u8 reg, u8 value)
1719 outb_p(reg, data->addr + IT87_ADDR_REG_OFFSET);
1720 outb_p(value, data->addr + IT87_DATA_REG_OFFSET);
1723 /* Return 1 if and only if the PWM interface is safe to use */
1724 static int __devinit it87_check_pwm(struct device *dev)
1726 struct it87_data *data = dev_get_drvdata(dev);
1727 /* Some BIOSes fail to correctly configure the IT87 fans. All fans off
1728 * and polarity set to active low is sign that this is the case so we
1729 * disable pwm control to protect the user. */
1730 int tmp = it87_read_value(data, IT87_REG_FAN_CTL);
1731 if ((tmp & 0x87) == 0) {
1732 if (fix_pwm_polarity) {
1733 /* The user asks us to attempt a chip reconfiguration.
1734 * This means switching to active high polarity and
1735 * inverting all fan speed values. */
1739 for (i = 0; i < 3; i++)
1740 pwm[i] = it87_read_value(data,
1743 /* If any fan is in automatic pwm mode, the polarity
1744 * might be correct, as suspicious as it seems, so we
1745 * better don't change anything (but still disable the
1746 * PWM interface). */
1747 if (!((pwm[0] | pwm[1] | pwm[2]) & 0x80)) {
1748 dev_info(dev, "Reconfiguring PWM to "
1749 "active high polarity\n");
1750 it87_write_value(data, IT87_REG_FAN_CTL,
1752 for (i = 0; i < 3; i++)
1753 it87_write_value(data,
1759 dev_info(dev, "PWM configuration is "
1760 "too broken to be fixed\n");
1763 dev_info(dev, "Detected broken BIOS "
1764 "defaults, disabling PWM interface\n");
1766 } else if (fix_pwm_polarity) {
1767 dev_info(dev, "PWM configuration looks "
1768 "sane, won't touch\n");
1774 /* Called when we have found a new IT87. */
1775 static void __devinit it87_init_device(struct platform_device *pdev)
1777 struct it87_sio_data *sio_data = pdev->dev.platform_data;
1778 struct it87_data *data = platform_get_drvdata(pdev);
1782 /* For each PWM channel:
1783 * - If it is in automatic mode, setting to manual mode should set
1784 * the fan to full speed by default.
1785 * - If it is in manual mode, we need a mapping to temperature
1786 * channels to use when later setting to automatic mode later.
1787 * Use a 1:1 mapping by default (we are clueless.)
1788 * In both cases, the value can (and should) be changed by the user
1789 * prior to switching to a different mode. */
1790 for (i = 0; i < 3; i++) {
1791 data->pwm_temp_map[i] = i;
1792 data->pwm_duty[i] = 0x7f; /* Full speed */
1793 data->auto_pwm[i][3] = 0x7f; /* Full speed, hard-coded */
1796 /* Some chips seem to have default value 0xff for all limit
1797 * registers. For low voltage limits it makes no sense and triggers
1798 * alarms, so change to 0 instead. For high temperature limits, it
1799 * means -1 degree C, which surprisingly doesn't trigger an alarm,
1800 * but is still confusing, so change to 127 degrees C. */
1801 for (i = 0; i < 8; i++) {
1802 tmp = it87_read_value(data, IT87_REG_VIN_MIN(i));
1804 it87_write_value(data, IT87_REG_VIN_MIN(i), 0);
1806 for (i = 0; i < 3; i++) {
1807 tmp = it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1809 it87_write_value(data, IT87_REG_TEMP_HIGH(i), 127);
1812 /* Check if temperature channels are reset manually or by some reason */
1813 tmp = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1814 if ((tmp & 0x3f) == 0) {
1815 /* Temp1,Temp3=thermistor; Temp2=thermal diode */
1816 tmp = (tmp & 0xc0) | 0x2a;
1817 it87_write_value(data, IT87_REG_TEMP_ENABLE, tmp);
1821 /* Check if voltage monitors are reset manually or by some reason */
1822 tmp = it87_read_value(data, IT87_REG_VIN_ENABLE);
1823 if ((tmp & 0xff) == 0) {
1824 /* Enable all voltage monitors */
1825 it87_write_value(data, IT87_REG_VIN_ENABLE, 0xff);
1828 /* Check if tachometers are reset manually or by some reason */
1829 mask = 0x70 & ~(sio_data->skip_fan << 4);
1830 data->fan_main_ctrl = it87_read_value(data, IT87_REG_FAN_MAIN_CTRL);
1831 if ((data->fan_main_ctrl & mask) == 0) {
1832 /* Enable all fan tachometers */
1833 data->fan_main_ctrl |= mask;
1834 it87_write_value(data, IT87_REG_FAN_MAIN_CTRL,
1835 data->fan_main_ctrl);
1837 data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
1839 /* Set tachometers to 16-bit mode if needed */
1840 if (has_16bit_fans(data)) {
1841 tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
1842 if (~tmp & 0x07 & data->has_fan) {
1844 "Setting fan1-3 to 16-bit mode\n");
1845 it87_write_value(data, IT87_REG_FAN_16BIT,
1848 /* IT8705F only supports three fans. */
1849 if (data->type != it87) {
1851 data->has_fan |= (1 << 3); /* fan4 enabled */
1853 data->has_fan |= (1 << 4); /* fan5 enabled */
1857 /* Fan input pins may be used for alternative functions */
1858 data->has_fan &= ~sio_data->skip_fan;
1860 /* Start monitoring */
1861 it87_write_value(data, IT87_REG_CONFIG,
1862 (it87_read_value(data, IT87_REG_CONFIG) & 0x36)
1863 | (update_vbat ? 0x41 : 0x01));
1866 static void it87_update_pwm_ctrl(struct it87_data *data, int nr)
1868 data->pwm_ctrl[nr] = it87_read_value(data, IT87_REG_PWM(nr));
1869 if (data->pwm_ctrl[nr] & 0x80) /* Automatic mode */
1870 data->pwm_temp_map[nr] = data->pwm_ctrl[nr] & 0x03;
1871 else /* Manual mode */
1872 data->pwm_duty[nr] = data->pwm_ctrl[nr] & 0x7f;
1874 if (has_old_autopwm(data)) {
1877 for (i = 0; i < 5 ; i++)
1878 data->auto_temp[nr][i] = it87_read_value(data,
1879 IT87_REG_AUTO_TEMP(nr, i));
1880 for (i = 0; i < 3 ; i++)
1881 data->auto_pwm[nr][i] = it87_read_value(data,
1882 IT87_REG_AUTO_PWM(nr, i));
1886 static struct it87_data *it87_update_device(struct device *dev)
1888 struct it87_data *data = dev_get_drvdata(dev);
1891 mutex_lock(&data->update_lock);
1893 if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
1896 /* Cleared after each update, so reenable. Value
1897 returned by this read will be previous value */
1898 it87_write_value(data, IT87_REG_CONFIG,
1899 it87_read_value(data, IT87_REG_CONFIG) | 0x40);
1901 for (i = 0; i <= 7; i++) {
1903 it87_read_value(data, IT87_REG_VIN(i));
1905 it87_read_value(data, IT87_REG_VIN_MIN(i));
1907 it87_read_value(data, IT87_REG_VIN_MAX(i));
1909 /* in8 (battery) has no limit registers */
1910 data->in[8] = it87_read_value(data, IT87_REG_VIN(8));
1912 for (i = 0; i < 5; i++) {
1913 /* Skip disabled fans */
1914 if (!(data->has_fan & (1 << i)))
1918 it87_read_value(data, IT87_REG_FAN_MIN[i]);
1919 data->fan[i] = it87_read_value(data,
1921 /* Add high byte if in 16-bit mode */
1922 if (has_16bit_fans(data)) {
1923 data->fan[i] |= it87_read_value(data,
1924 IT87_REG_FANX[i]) << 8;
1925 data->fan_min[i] |= it87_read_value(data,
1926 IT87_REG_FANX_MIN[i]) << 8;
1929 for (i = 0; i < 3; i++) {
1931 it87_read_value(data, IT87_REG_TEMP(i));
1932 data->temp_high[i] =
1933 it87_read_value(data, IT87_REG_TEMP_HIGH(i));
1935 it87_read_value(data, IT87_REG_TEMP_LOW(i));
1938 /* Newer chips don't have clock dividers */
1939 if ((data->has_fan & 0x07) && !has_16bit_fans(data)) {
1940 i = it87_read_value(data, IT87_REG_FAN_DIV);
1941 data->fan_div[0] = i & 0x07;
1942 data->fan_div[1] = (i >> 3) & 0x07;
1943 data->fan_div[2] = (i & 0x40) ? 3 : 1;
1947 it87_read_value(data, IT87_REG_ALARM1) |
1948 (it87_read_value(data, IT87_REG_ALARM2) << 8) |
1949 (it87_read_value(data, IT87_REG_ALARM3) << 16);
1950 data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
1952 data->fan_main_ctrl = it87_read_value(data,
1953 IT87_REG_FAN_MAIN_CTRL);
1954 data->fan_ctl = it87_read_value(data, IT87_REG_FAN_CTL);
1955 for (i = 0; i < 3; i++)
1956 it87_update_pwm_ctrl(data, i);
1958 data->sensor = it87_read_value(data, IT87_REG_TEMP_ENABLE);
1959 /* The 8705 does not have VID capability.
1960 The 8718 and the 8720 don't use IT87_REG_VID for the
1962 if (data->type == it8712 || data->type == it8716) {
1963 data->vid = it87_read_value(data, IT87_REG_VID);
1964 /* The older IT8712F revisions had only 5 VID pins,
1965 but we assume it is always safe to read 6 bits. */
1968 data->last_updated = jiffies;
1972 mutex_unlock(&data->update_lock);
1977 static int __init it87_device_add(unsigned short address,
1978 const struct it87_sio_data *sio_data)
1980 struct resource res = {
1981 .start = address + IT87_EC_OFFSET,
1982 .end = address + IT87_EC_OFFSET + IT87_EC_EXTENT - 1,
1984 .flags = IORESOURCE_IO,
1988 err = acpi_check_resource_conflict(&res);
1992 pdev = platform_device_alloc(DRVNAME, address);
1995 printk(KERN_ERR DRVNAME ": Device allocation failed\n");
1999 err = platform_device_add_resources(pdev, &res, 1);
2001 printk(KERN_ERR DRVNAME ": Device resource addition failed "
2003 goto exit_device_put;
2006 err = platform_device_add_data(pdev, sio_data,
2007 sizeof(struct it87_sio_data));
2009 printk(KERN_ERR DRVNAME ": Platform data allocation failed\n");
2010 goto exit_device_put;
2013 err = platform_device_add(pdev);
2015 printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
2017 goto exit_device_put;
2023 platform_device_put(pdev);
2028 static int __init sm_it87_init(void)
2031 unsigned short isa_address = 0;
2032 struct it87_sio_data sio_data;
2034 memset(&sio_data, 0, sizeof(struct it87_sio_data));
2035 err = it87_find(&isa_address, &sio_data);
2038 err = platform_driver_register(&it87_driver);
2042 err = it87_device_add(isa_address, &sio_data);
2044 platform_driver_unregister(&it87_driver);
2051 static void __exit sm_it87_exit(void)
2053 platform_device_unregister(pdev);
2054 platform_driver_unregister(&it87_driver);
2058 MODULE_AUTHOR("Chris Gauthron, "
2059 "Jean Delvare <khali@linux-fr.org>");
2060 MODULE_DESCRIPTION("IT8705F/8712F/8716F/8718F/8720F/8726F, SiS950 driver");
2061 module_param(update_vbat, bool, 0);
2062 MODULE_PARM_DESC(update_vbat, "Update vbat if set else return powerup value");
2063 module_param(fix_pwm_polarity, bool, 0);
2064 MODULE_PARM_DESC(fix_pwm_polarity,
2065 "Force PWM polarity to active high (DANGEROUS)");
2066 MODULE_LICENSE("GPL");
2068 module_init(sm_it87_init);
2069 module_exit(sm_it87_exit);