1 // SPDX-License-Identifier: GPL-2.0-only
3 * adt7475 - Thermal sensor driver for the ADT7475 chip and derivatives
4 * Copyright (C) 2007-2008, Advanced Micro Devices, Inc.
5 * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
6 * Copyright (C) 2008 Hans de Goede <hdegoede@redhat.com>
7 * Copyright (C) 2009 Jean Delvare <jdelvare@suse.de>
9 * Derived from the lm83 driver by Jean Delvare
12 #include <linux/module.h>
13 #include <linux/of_device.h>
14 #include <linux/init.h>
15 #include <linux/slab.h>
16 #include <linux/i2c.h>
17 #include <linux/hwmon.h>
18 #include <linux/hwmon-sysfs.h>
19 #include <linux/hwmon-vid.h>
20 #include <linux/err.h>
21 #include <linux/jiffies.h>
22 #include <linux/util_macros.h>
24 /* Indexes for the sysfs hooks */
36 * These are unique identifiers for the sysfs functions - unlike the
37 * numbers above, these are not also indexes into an array
43 /* 7475 Common Registers */
45 #define REG_DEVREV2 0x12 /* ADT7490 only */
47 #define REG_VTT 0x1E /* ADT7490 only */
48 #define REG_EXTEND3 0x1F /* ADT7490 only */
50 #define REG_VOLTAGE_BASE 0x20
51 #define REG_TEMP_BASE 0x25
52 #define REG_TACH_BASE 0x28
53 #define REG_PWM_BASE 0x30
54 #define REG_PWM_MAX_BASE 0x38
56 #define REG_DEVID 0x3D
57 #define REG_VENDID 0x3E
58 #define REG_DEVID2 0x3F
60 #define REG_CONFIG1 0x40
62 #define REG_STATUS1 0x41
63 #define REG_STATUS2 0x42
65 #define REG_VID 0x43 /* ADT7476 only */
67 #define REG_VOLTAGE_MIN_BASE 0x44
68 #define REG_VOLTAGE_MAX_BASE 0x45
70 #define REG_TEMP_MIN_BASE 0x4E
71 #define REG_TEMP_MAX_BASE 0x4F
73 #define REG_TACH_MIN_BASE 0x54
75 #define REG_PWM_CONFIG_BASE 0x5C
77 #define REG_TEMP_TRANGE_BASE 0x5F
79 #define REG_ENHANCE_ACOUSTICS1 0x62
80 #define REG_ENHANCE_ACOUSTICS2 0x63
82 #define REG_PWM_MIN_BASE 0x64
84 #define REG_TEMP_TMIN_BASE 0x67
85 #define REG_TEMP_THERM_BASE 0x6A
87 #define REG_REMOTE1_HYSTERSIS 0x6D
88 #define REG_REMOTE2_HYSTERSIS 0x6E
90 #define REG_TEMP_OFFSET_BASE 0x70
92 #define REG_CONFIG2 0x73
94 #define REG_EXTEND1 0x76
95 #define REG_EXTEND2 0x77
97 #define REG_CONFIG3 0x78
98 #define REG_CONFIG5 0x7C
99 #define REG_CONFIG4 0x7D
101 #define REG_STATUS4 0x81 /* ADT7490 only */
103 #define REG_VTT_MIN 0x84 /* ADT7490 only */
104 #define REG_VTT_MAX 0x86 /* ADT7490 only */
106 #define VID_VIDSEL 0x80 /* ADT7476 only */
108 #define CONFIG2_ATTN 0x20
110 #define CONFIG3_SMBALERT 0x01
111 #define CONFIG3_THERM 0x02
113 #define CONFIG4_PINFUNC 0x03
114 #define CONFIG4_MAXDUTY 0x08
115 #define CONFIG4_ATTN_IN10 0x30
116 #define CONFIG4_ATTN_IN43 0xC0
118 #define CONFIG5_TWOSCOMP 0x01
119 #define CONFIG5_TEMPOFFSET 0x02
120 #define CONFIG5_VIDGPIO 0x10 /* ADT7476 only */
122 /* ADT7475 Settings */
124 #define ADT7475_VOLTAGE_COUNT 5 /* Not counting Vtt */
125 #define ADT7475_TEMP_COUNT 3
126 #define ADT7475_TACH_COUNT 4
127 #define ADT7475_PWM_COUNT 3
129 /* Macro to read the registers */
131 #define adt7475_read(reg) i2c_smbus_read_byte_data(client, (reg))
133 /* Macros to easily index the registers */
135 #define TACH_REG(idx) (REG_TACH_BASE + ((idx) * 2))
136 #define TACH_MIN_REG(idx) (REG_TACH_MIN_BASE + ((idx) * 2))
138 #define PWM_REG(idx) (REG_PWM_BASE + (idx))
139 #define PWM_MAX_REG(idx) (REG_PWM_MAX_BASE + (idx))
140 #define PWM_MIN_REG(idx) (REG_PWM_MIN_BASE + (idx))
141 #define PWM_CONFIG_REG(idx) (REG_PWM_CONFIG_BASE + (idx))
143 #define VOLTAGE_REG(idx) (REG_VOLTAGE_BASE + (idx))
144 #define VOLTAGE_MIN_REG(idx) (REG_VOLTAGE_MIN_BASE + ((idx) * 2))
145 #define VOLTAGE_MAX_REG(idx) (REG_VOLTAGE_MAX_BASE + ((idx) * 2))
147 #define TEMP_REG(idx) (REG_TEMP_BASE + (idx))
148 #define TEMP_MIN_REG(idx) (REG_TEMP_MIN_BASE + ((idx) * 2))
149 #define TEMP_MAX_REG(idx) (REG_TEMP_MAX_BASE + ((idx) * 2))
150 #define TEMP_TMIN_REG(idx) (REG_TEMP_TMIN_BASE + (idx))
151 #define TEMP_THERM_REG(idx) (REG_TEMP_THERM_BASE + (idx))
152 #define TEMP_OFFSET_REG(idx) (REG_TEMP_OFFSET_BASE + (idx))
153 #define TEMP_TRANGE_REG(idx) (REG_TEMP_TRANGE_BASE + (idx))
155 static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
157 enum chips { adt7473, adt7475, adt7476, adt7490 };
159 static const struct i2c_device_id adt7475_id[] = {
160 { "adt7473", adt7473 },
161 { "adt7475", adt7475 },
162 { "adt7476", adt7476 },
163 { "adt7490", adt7490 },
166 MODULE_DEVICE_TABLE(i2c, adt7475_id);
168 static const struct of_device_id __maybe_unused adt7475_of_match[] = {
170 .compatible = "adi,adt7473",
171 .data = (void *)adt7473
174 .compatible = "adi,adt7475",
175 .data = (void *)adt7475
178 .compatible = "adi,adt7476",
179 .data = (void *)adt7476
182 .compatible = "adi,adt7490",
183 .data = (void *)adt7490
187 MODULE_DEVICE_TABLE(of, adt7475_of_match);
189 struct adt7475_data {
190 struct i2c_client *client;
193 unsigned long measure_updated;
199 u8 bypass_attn; /* Bypass voltage attenuator */
215 const struct attribute_group *groups[9];
218 static struct i2c_driver adt7475_driver;
219 static struct adt7475_data *adt7475_update_device(struct device *dev);
220 static void adt7475_read_hystersis(struct i2c_client *client);
221 static void adt7475_read_pwm(struct i2c_client *client, int index);
223 /* Given a temp value, convert it to register value */
225 static inline u16 temp2reg(struct adt7475_data *data, long val)
229 if (!(data->config5 & CONFIG5_TWOSCOMP)) {
230 val = clamp_val(val, -64000, 191000);
231 ret = (val + 64500) / 1000;
233 val = clamp_val(val, -128000, 127000);
235 ret = (256500 + val) / 1000;
237 ret = (val + 500) / 1000;
243 /* Given a register value, convert it to a real temp value */
245 static inline int reg2temp(struct adt7475_data *data, u16 reg)
247 if (data->config5 & CONFIG5_TWOSCOMP) {
249 return (reg - 1024) * 250;
253 return (reg - 256) * 250;
256 static inline int tach2rpm(u16 tach)
258 if (tach == 0 || tach == 0xFFFF)
261 return (90000 * 60) / tach;
264 static inline u16 rpm2tach(unsigned long rpm)
269 return clamp_val((90000 * 60) / rpm, 1, 0xFFFF);
272 /* Scaling factors for voltage inputs, taken from the ADT7490 datasheet */
273 static const int adt7473_in_scaling[ADT7475_VOLTAGE_COUNT + 1][2] = {
274 { 45, 94 }, /* +2.5V */
275 { 175, 525 }, /* Vccp */
276 { 68, 71 }, /* Vcc */
277 { 93, 47 }, /* +5V */
278 { 120, 20 }, /* +12V */
279 { 45, 45 }, /* Vtt */
282 static inline int reg2volt(int channel, u16 reg, u8 bypass_attn)
284 const int *r = adt7473_in_scaling[channel];
286 if (bypass_attn & (1 << channel))
287 return DIV_ROUND_CLOSEST(reg * 2250, 1024);
288 return DIV_ROUND_CLOSEST(reg * (r[0] + r[1]) * 2250, r[1] * 1024);
291 static inline u16 volt2reg(int channel, long volt, u8 bypass_attn)
293 const int *r = adt7473_in_scaling[channel];
296 if (bypass_attn & (1 << channel))
297 reg = DIV_ROUND_CLOSEST(volt * 1024, 2250);
299 reg = DIV_ROUND_CLOSEST(volt * r[1] * 1024,
300 (r[0] + r[1]) * 2250);
301 return clamp_val(reg, 0, 1023) & (0xff << 2);
304 static int adt7475_read_word(struct i2c_client *client, int reg)
308 val1 = i2c_smbus_read_byte_data(client, reg);
311 val2 = i2c_smbus_read_byte_data(client, reg + 1);
315 return val1 | (val2 << 8);
318 static void adt7475_write_word(struct i2c_client *client, int reg, u16 val)
320 i2c_smbus_write_byte_data(client, reg + 1, val >> 8);
321 i2c_smbus_write_byte_data(client, reg, val & 0xFF);
324 static ssize_t voltage_show(struct device *dev, struct device_attribute *attr,
327 struct adt7475_data *data = adt7475_update_device(dev);
328 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
332 return PTR_ERR(data);
336 return sprintf(buf, "%d\n",
337 (data->alarms >> sattr->index) & 1);
339 val = data->voltage[sattr->nr][sattr->index];
340 return sprintf(buf, "%d\n",
341 reg2volt(sattr->index, val, data->bypass_attn));
345 static ssize_t voltage_store(struct device *dev,
346 struct device_attribute *attr, const char *buf,
350 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
351 struct adt7475_data *data = dev_get_drvdata(dev);
352 struct i2c_client *client = data->client;
356 if (kstrtol(buf, 10, &val))
359 mutex_lock(&data->lock);
361 data->voltage[sattr->nr][sattr->index] =
362 volt2reg(sattr->index, val, data->bypass_attn);
364 if (sattr->index < ADT7475_VOLTAGE_COUNT) {
365 if (sattr->nr == MIN)
366 reg = VOLTAGE_MIN_REG(sattr->index);
368 reg = VOLTAGE_MAX_REG(sattr->index);
370 if (sattr->nr == MIN)
376 i2c_smbus_write_byte_data(client, reg,
377 data->voltage[sattr->nr][sattr->index] >> 2);
378 mutex_unlock(&data->lock);
383 static ssize_t temp_show(struct device *dev, struct device_attribute *attr,
386 struct adt7475_data *data = adt7475_update_device(dev);
387 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
391 return PTR_ERR(data);
395 mutex_lock(&data->lock);
396 out = data->temp[sattr->nr][sattr->index];
397 if (sattr->index != 1)
398 out = (out >> 4) & 0xF;
402 * Show the value as an absolute number tied to
405 out = reg2temp(data, data->temp[THERM][sattr->index]) -
407 mutex_unlock(&data->lock);
412 * Offset is always 2's complement, regardless of the
415 mutex_lock(&data->lock);
416 out = (s8)data->temp[sattr->nr][sattr->index];
417 if (data->config5 & CONFIG5_TEMPOFFSET)
421 mutex_unlock(&data->lock);
425 out = (data->alarms >> (sattr->index + 4)) & 1;
429 /* Note - only for remote1 and remote2 */
430 out = !!(data->alarms & (sattr->index ? 0x8000 : 0x4000));
434 /* All other temp values are in the configured format */
435 out = reg2temp(data, data->temp[sattr->nr][sattr->index]);
438 return sprintf(buf, "%d\n", out);
441 static ssize_t temp_store(struct device *dev, struct device_attribute *attr,
442 const char *buf, size_t count)
444 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
445 struct adt7475_data *data = dev_get_drvdata(dev);
446 struct i2c_client *client = data->client;
447 unsigned char reg = 0;
452 if (kstrtol(buf, 10, &val))
455 mutex_lock(&data->lock);
457 /* We need the config register in all cases for temp <-> reg conv. */
458 data->config5 = adt7475_read(REG_CONFIG5);
462 if (data->config5 & CONFIG5_TEMPOFFSET) {
463 val = clamp_val(val, -63000, 127000);
464 out = data->temp[OFFSET][sattr->index] = val / 1000;
466 val = clamp_val(val, -63000, 64000);
467 out = data->temp[OFFSET][sattr->index] = val / 500;
473 * The value will be given as an absolute value, turn it
474 * into an offset based on THERM
477 /* Read fresh THERM and HYSTERSIS values from the chip */
478 data->temp[THERM][sattr->index] =
479 adt7475_read(TEMP_THERM_REG(sattr->index)) << 2;
480 adt7475_read_hystersis(client);
482 temp = reg2temp(data, data->temp[THERM][sattr->index]);
483 val = clamp_val(val, temp - 15000, temp);
484 val = (temp - val) / 1000;
486 if (sattr->index != 1) {
487 data->temp[HYSTERSIS][sattr->index] &= 0xF0;
488 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF) << 4;
490 data->temp[HYSTERSIS][sattr->index] &= 0x0F;
491 data->temp[HYSTERSIS][sattr->index] |= (val & 0xF);
494 out = data->temp[HYSTERSIS][sattr->index];
498 data->temp[sattr->nr][sattr->index] = temp2reg(data, val);
501 * We maintain an extra 2 digits of precision for simplicity
502 * - shift those back off before writing the value
504 out = (u8) (data->temp[sattr->nr][sattr->index] >> 2);
509 reg = TEMP_MIN_REG(sattr->index);
512 reg = TEMP_MAX_REG(sattr->index);
515 reg = TEMP_OFFSET_REG(sattr->index);
518 reg = TEMP_TMIN_REG(sattr->index);
521 reg = TEMP_THERM_REG(sattr->index);
524 if (sattr->index != 2)
525 reg = REG_REMOTE1_HYSTERSIS;
527 reg = REG_REMOTE2_HYSTERSIS;
532 i2c_smbus_write_byte_data(client, reg, out);
534 mutex_unlock(&data->lock);
538 /* Assuming CONFIG6[SLOW] is 0 */
539 static const int ad7475_st_map[] = {
540 37500, 18800, 12500, 7500, 4700, 3100, 1600, 800,
543 static ssize_t temp_st_show(struct device *dev, struct device_attribute *attr,
546 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
547 struct adt7475_data *data = dev_get_drvdata(dev);
550 switch (sattr->index) {
552 val = data->enh_acoustics[0] & 0xf;
555 val = (data->enh_acoustics[1] >> 4) & 0xf;
559 val = data->enh_acoustics[1] & 0xf;
564 return sprintf(buf, "%d\n", ad7475_st_map[val & 0x7]);
566 return sprintf(buf, "0\n");
569 static ssize_t temp_st_store(struct device *dev,
570 struct device_attribute *attr, const char *buf,
573 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
574 struct adt7475_data *data = dev_get_drvdata(dev);
575 struct i2c_client *client = data->client;
580 if (kstrtoul(buf, 10, &val))
583 switch (sattr->index) {
585 reg = REG_ENHANCE_ACOUSTICS1;
590 reg = REG_ENHANCE_ACOUSTICS2;
596 reg = REG_ENHANCE_ACOUSTICS2;
603 val = find_closest_descending(val, ad7475_st_map,
604 ARRAY_SIZE(ad7475_st_map));
608 mutex_lock(&data->lock);
610 data->enh_acoustics[idx] &= ~(0xf << shift);
611 data->enh_acoustics[idx] |= (val << shift);
613 i2c_smbus_write_byte_data(client, reg, data->enh_acoustics[idx]);
615 mutex_unlock(&data->lock);
621 * Table of autorange values - the user will write the value in millidegrees,
622 * and we'll convert it
624 static const int autorange_table[] = {
625 2000, 2500, 3330, 4000, 5000, 6670, 8000,
626 10000, 13330, 16000, 20000, 26670, 32000, 40000,
630 static ssize_t point2_show(struct device *dev, struct device_attribute *attr,
633 struct adt7475_data *data = adt7475_update_device(dev);
634 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
638 return PTR_ERR(data);
640 mutex_lock(&data->lock);
641 out = (data->range[sattr->index] >> 4) & 0x0F;
642 val = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
643 mutex_unlock(&data->lock);
645 return sprintf(buf, "%d\n", val + autorange_table[out]);
648 static ssize_t point2_store(struct device *dev, struct device_attribute *attr,
649 const char *buf, size_t count)
651 struct adt7475_data *data = dev_get_drvdata(dev);
652 struct i2c_client *client = data->client;
653 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
657 if (kstrtol(buf, 10, &val))
660 mutex_lock(&data->lock);
662 /* Get a fresh copy of the needed registers */
663 data->config5 = adt7475_read(REG_CONFIG5);
664 data->temp[AUTOMIN][sattr->index] =
665 adt7475_read(TEMP_TMIN_REG(sattr->index)) << 2;
666 data->range[sattr->index] =
667 adt7475_read(TEMP_TRANGE_REG(sattr->index));
670 * The user will write an absolute value, so subtract the start point
671 * to figure the range
673 temp = reg2temp(data, data->temp[AUTOMIN][sattr->index]);
674 val = clamp_val(val, temp + autorange_table[0],
675 temp + autorange_table[ARRAY_SIZE(autorange_table) - 1]);
678 /* Find the nearest table entry to what the user wrote */
679 val = find_closest(val, autorange_table, ARRAY_SIZE(autorange_table));
681 data->range[sattr->index] &= ~0xF0;
682 data->range[sattr->index] |= val << 4;
684 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
685 data->range[sattr->index]);
687 mutex_unlock(&data->lock);
691 static ssize_t tach_show(struct device *dev, struct device_attribute *attr,
694 struct adt7475_data *data = adt7475_update_device(dev);
695 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
699 return PTR_ERR(data);
701 if (sattr->nr == ALARM)
702 out = (data->alarms >> (sattr->index + 10)) & 1;
704 out = tach2rpm(data->tach[sattr->nr][sattr->index]);
706 return sprintf(buf, "%d\n", out);
709 static ssize_t tach_store(struct device *dev, struct device_attribute *attr,
710 const char *buf, size_t count)
713 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
714 struct adt7475_data *data = dev_get_drvdata(dev);
715 struct i2c_client *client = data->client;
718 if (kstrtoul(buf, 10, &val))
721 mutex_lock(&data->lock);
723 data->tach[MIN][sattr->index] = rpm2tach(val);
725 adt7475_write_word(client, TACH_MIN_REG(sattr->index),
726 data->tach[MIN][sattr->index]);
728 mutex_unlock(&data->lock);
732 static ssize_t pwm_show(struct device *dev, struct device_attribute *attr,
735 struct adt7475_data *data = adt7475_update_device(dev);
736 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
739 return PTR_ERR(data);
741 return sprintf(buf, "%d\n", data->pwm[sattr->nr][sattr->index]);
744 static ssize_t pwmchan_show(struct device *dev, struct device_attribute *attr,
747 struct adt7475_data *data = adt7475_update_device(dev);
748 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
751 return PTR_ERR(data);
753 return sprintf(buf, "%d\n", data->pwmchan[sattr->index]);
756 static ssize_t pwmctrl_show(struct device *dev, struct device_attribute *attr,
759 struct adt7475_data *data = adt7475_update_device(dev);
760 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
763 return PTR_ERR(data);
765 return sprintf(buf, "%d\n", data->pwmctl[sattr->index]);
768 static ssize_t pwm_store(struct device *dev, struct device_attribute *attr,
769 const char *buf, size_t count)
772 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
773 struct adt7475_data *data = dev_get_drvdata(dev);
774 struct i2c_client *client = data->client;
775 unsigned char reg = 0;
778 if (kstrtol(buf, 10, &val))
781 mutex_lock(&data->lock);
785 /* Get a fresh value for CONTROL */
786 data->pwm[CONTROL][sattr->index] =
787 adt7475_read(PWM_CONFIG_REG(sattr->index));
790 * If we are not in manual mode, then we shouldn't allow
791 * the user to set the pwm speed
793 if (((data->pwm[CONTROL][sattr->index] >> 5) & 7) != 7) {
794 mutex_unlock(&data->lock);
798 reg = PWM_REG(sattr->index);
802 reg = PWM_MIN_REG(sattr->index);
806 reg = PWM_MAX_REG(sattr->index);
810 data->pwm[sattr->nr][sattr->index] = clamp_val(val, 0, 0xFF);
811 i2c_smbus_write_byte_data(client, reg,
812 data->pwm[sattr->nr][sattr->index]);
813 mutex_unlock(&data->lock);
818 static ssize_t stall_disable_show(struct device *dev,
819 struct device_attribute *attr, char *buf)
821 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
822 struct adt7475_data *data = dev_get_drvdata(dev);
824 u8 mask = BIT(5 + sattr->index);
826 return sprintf(buf, "%d\n", !!(data->enh_acoustics[0] & mask));
829 static ssize_t stall_disable_store(struct device *dev,
830 struct device_attribute *attr,
831 const char *buf, size_t count)
833 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
834 struct adt7475_data *data = dev_get_drvdata(dev);
835 struct i2c_client *client = data->client;
837 u8 mask = BIT(5 + sattr->index);
839 if (kstrtol(buf, 10, &val))
842 mutex_lock(&data->lock);
844 data->enh_acoustics[0] &= ~mask;
846 data->enh_acoustics[0] |= mask;
848 i2c_smbus_write_byte_data(client, REG_ENHANCE_ACOUSTICS1,
849 data->enh_acoustics[0]);
851 mutex_unlock(&data->lock);
856 /* Called by set_pwmctrl and set_pwmchan */
858 static int hw_set_pwm(struct i2c_client *client, int index,
859 unsigned int pwmctl, unsigned int pwmchan)
861 struct adt7475_data *data = i2c_get_clientdata(client);
866 val = 0x03; /* Run at full speed */
869 val = 0x07; /* Manual mode */
874 /* Remote1 controls PWM */
878 /* local controls PWM */
882 /* remote2 controls PWM */
886 /* local/remote2 control PWM */
890 /* All three control PWM */
901 data->pwmctl[index] = pwmctl;
902 data->pwmchan[index] = pwmchan;
904 data->pwm[CONTROL][index] &= ~0xE0;
905 data->pwm[CONTROL][index] |= (val & 7) << 5;
907 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
908 data->pwm[CONTROL][index]);
913 static ssize_t pwmchan_store(struct device *dev,
914 struct device_attribute *attr, const char *buf,
917 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
918 struct adt7475_data *data = dev_get_drvdata(dev);
919 struct i2c_client *client = data->client;
923 if (kstrtol(buf, 10, &val))
926 mutex_lock(&data->lock);
927 /* Read Modify Write PWM values */
928 adt7475_read_pwm(client, sattr->index);
929 r = hw_set_pwm(client, sattr->index, data->pwmctl[sattr->index], val);
932 mutex_unlock(&data->lock);
937 static ssize_t pwmctrl_store(struct device *dev,
938 struct device_attribute *attr, const char *buf,
941 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
942 struct adt7475_data *data = dev_get_drvdata(dev);
943 struct i2c_client *client = data->client;
947 if (kstrtol(buf, 10, &val))
950 mutex_lock(&data->lock);
951 /* Read Modify Write PWM values */
952 adt7475_read_pwm(client, sattr->index);
953 r = hw_set_pwm(client, sattr->index, val, data->pwmchan[sattr->index]);
956 mutex_unlock(&data->lock);
961 /* List of frequencies for the PWM */
962 static const int pwmfreq_table[] = {
963 11, 14, 22, 29, 35, 44, 58, 88, 22500
966 static ssize_t pwmfreq_show(struct device *dev, struct device_attribute *attr,
969 struct adt7475_data *data = adt7475_update_device(dev);
970 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
974 return PTR_ERR(data);
975 idx = clamp_val(data->range[sattr->index] & 0xf, 0,
976 ARRAY_SIZE(pwmfreq_table) - 1);
978 return sprintf(buf, "%d\n", pwmfreq_table[idx]);
981 static ssize_t pwmfreq_store(struct device *dev,
982 struct device_attribute *attr, const char *buf,
985 struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr);
986 struct adt7475_data *data = dev_get_drvdata(dev);
987 struct i2c_client *client = data->client;
991 if (kstrtol(buf, 10, &val))
994 out = find_closest(val, pwmfreq_table, ARRAY_SIZE(pwmfreq_table));
996 mutex_lock(&data->lock);
998 data->range[sattr->index] =
999 adt7475_read(TEMP_TRANGE_REG(sattr->index));
1000 data->range[sattr->index] &= ~0xf;
1001 data->range[sattr->index] |= out;
1003 i2c_smbus_write_byte_data(client, TEMP_TRANGE_REG(sattr->index),
1004 data->range[sattr->index]);
1006 mutex_unlock(&data->lock);
1010 static ssize_t pwm_use_point2_pwm_at_crit_show(struct device *dev,
1011 struct device_attribute *devattr,
1014 struct adt7475_data *data = adt7475_update_device(dev);
1017 return PTR_ERR(data);
1019 return sprintf(buf, "%d\n", !!(data->config4 & CONFIG4_MAXDUTY));
1022 static ssize_t pwm_use_point2_pwm_at_crit_store(struct device *dev,
1023 struct device_attribute *devattr,
1024 const char *buf, size_t count)
1026 struct adt7475_data *data = dev_get_drvdata(dev);
1027 struct i2c_client *client = data->client;
1030 if (kstrtol(buf, 10, &val))
1032 if (val != 0 && val != 1)
1035 mutex_lock(&data->lock);
1036 data->config4 = i2c_smbus_read_byte_data(client, REG_CONFIG4);
1038 data->config4 |= CONFIG4_MAXDUTY;
1040 data->config4 &= ~CONFIG4_MAXDUTY;
1041 i2c_smbus_write_byte_data(client, REG_CONFIG4, data->config4);
1042 mutex_unlock(&data->lock);
1047 static ssize_t vrm_show(struct device *dev, struct device_attribute *devattr,
1050 struct adt7475_data *data = dev_get_drvdata(dev);
1051 return sprintf(buf, "%d\n", (int)data->vrm);
1054 static ssize_t vrm_store(struct device *dev, struct device_attribute *devattr,
1055 const char *buf, size_t count)
1057 struct adt7475_data *data = dev_get_drvdata(dev);
1060 if (kstrtol(buf, 10, &val))
1062 if (val < 0 || val > 255)
1069 static ssize_t cpu0_vid_show(struct device *dev,
1070 struct device_attribute *devattr, char *buf)
1072 struct adt7475_data *data = adt7475_update_device(dev);
1075 return PTR_ERR(data);
1077 return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
1080 static SENSOR_DEVICE_ATTR_2_RO(in0_input, voltage, INPUT, 0);
1081 static SENSOR_DEVICE_ATTR_2_RW(in0_max, voltage, MAX, 0);
1082 static SENSOR_DEVICE_ATTR_2_RW(in0_min, voltage, MIN, 0);
1083 static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, voltage, ALARM, 0);
1084 static SENSOR_DEVICE_ATTR_2_RO(in1_input, voltage, INPUT, 1);
1085 static SENSOR_DEVICE_ATTR_2_RW(in1_max, voltage, MAX, 1);
1086 static SENSOR_DEVICE_ATTR_2_RW(in1_min, voltage, MIN, 1);
1087 static SENSOR_DEVICE_ATTR_2_RO(in1_alarm, voltage, ALARM, 1);
1088 static SENSOR_DEVICE_ATTR_2_RO(in2_input, voltage, INPUT, 2);
1089 static SENSOR_DEVICE_ATTR_2_RW(in2_max, voltage, MAX, 2);
1090 static SENSOR_DEVICE_ATTR_2_RW(in2_min, voltage, MIN, 2);
1091 static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, voltage, ALARM, 2);
1092 static SENSOR_DEVICE_ATTR_2_RO(in3_input, voltage, INPUT, 3);
1093 static SENSOR_DEVICE_ATTR_2_RW(in3_max, voltage, MAX, 3);
1094 static SENSOR_DEVICE_ATTR_2_RW(in3_min, voltage, MIN, 3);
1095 static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, voltage, ALARM, 3);
1096 static SENSOR_DEVICE_ATTR_2_RO(in4_input, voltage, INPUT, 4);
1097 static SENSOR_DEVICE_ATTR_2_RW(in4_max, voltage, MAX, 4);
1098 static SENSOR_DEVICE_ATTR_2_RW(in4_min, voltage, MIN, 4);
1099 static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, voltage, ALARM, 8);
1100 static SENSOR_DEVICE_ATTR_2_RO(in5_input, voltage, INPUT, 5);
1101 static SENSOR_DEVICE_ATTR_2_RW(in5_max, voltage, MAX, 5);
1102 static SENSOR_DEVICE_ATTR_2_RW(in5_min, voltage, MIN, 5);
1103 static SENSOR_DEVICE_ATTR_2_RO(in5_alarm, voltage, ALARM, 31);
1104 static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, INPUT, 0);
1105 static SENSOR_DEVICE_ATTR_2_RO(temp1_alarm, temp, ALARM, 0);
1106 static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, temp, FAULT, 0);
1107 static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, MAX, 0);
1108 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, MIN, 0);
1109 static SENSOR_DEVICE_ATTR_2_RW(temp1_offset, temp, OFFSET, 0);
1110 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point1_temp, temp, AUTOMIN, 0);
1111 static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, point2, 0, 0);
1112 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, THERM, 0);
1113 static SENSOR_DEVICE_ATTR_2_RW(temp1_crit_hyst, temp, HYSTERSIS, 0);
1114 static SENSOR_DEVICE_ATTR_2_RW(temp1_smoothing, temp_st, 0, 0);
1115 static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, INPUT, 1);
1116 static SENSOR_DEVICE_ATTR_2_RO(temp2_alarm, temp, ALARM, 1);
1117 static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, MAX, 1);
1118 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, MIN, 1);
1119 static SENSOR_DEVICE_ATTR_2_RW(temp2_offset, temp, OFFSET, 1);
1120 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp, AUTOMIN, 1);
1121 static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, point2, 0, 1);
1122 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, THERM, 1);
1123 static SENSOR_DEVICE_ATTR_2_RW(temp2_crit_hyst, temp, HYSTERSIS, 1);
1124 static SENSOR_DEVICE_ATTR_2_RW(temp2_smoothing, temp_st, 0, 1);
1125 static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, INPUT, 2);
1126 static SENSOR_DEVICE_ATTR_2_RO(temp3_alarm, temp, ALARM, 2);
1127 static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, temp, FAULT, 2);
1128 static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, MAX, 2);
1129 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, MIN, 2);
1130 static SENSOR_DEVICE_ATTR_2_RW(temp3_offset, temp, OFFSET, 2);
1131 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point1_temp, temp, AUTOMIN, 2);
1132 static SENSOR_DEVICE_ATTR_2_RW(temp3_auto_point2_temp, point2, 0, 2);
1133 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, THERM, 2);
1134 static SENSOR_DEVICE_ATTR_2_RW(temp3_crit_hyst, temp, HYSTERSIS, 2);
1135 static SENSOR_DEVICE_ATTR_2_RW(temp3_smoothing, temp_st, 0, 2);
1136 static SENSOR_DEVICE_ATTR_2_RO(fan1_input, tach, INPUT, 0);
1137 static SENSOR_DEVICE_ATTR_2_RW(fan1_min, tach, MIN, 0);
1138 static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, tach, ALARM, 0);
1139 static SENSOR_DEVICE_ATTR_2_RO(fan2_input, tach, INPUT, 1);
1140 static SENSOR_DEVICE_ATTR_2_RW(fan2_min, tach, MIN, 1);
1141 static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, tach, ALARM, 1);
1142 static SENSOR_DEVICE_ATTR_2_RO(fan3_input, tach, INPUT, 2);
1143 static SENSOR_DEVICE_ATTR_2_RW(fan3_min, tach, MIN, 2);
1144 static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, tach, ALARM, 2);
1145 static SENSOR_DEVICE_ATTR_2_RO(fan4_input, tach, INPUT, 3);
1146 static SENSOR_DEVICE_ATTR_2_RW(fan4_min, tach, MIN, 3);
1147 static SENSOR_DEVICE_ATTR_2_RO(fan4_alarm, tach, ALARM, 3);
1148 static SENSOR_DEVICE_ATTR_2_RW(pwm1, pwm, INPUT, 0);
1149 static SENSOR_DEVICE_ATTR_2_RW(pwm1_freq, pwmfreq, INPUT, 0);
1150 static SENSOR_DEVICE_ATTR_2_RW(pwm1_enable, pwmctrl, INPUT, 0);
1151 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_channels_temp, pwmchan, INPUT, 0);
1152 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_pwm, pwm, MIN, 0);
1153 static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_pwm, pwm, MAX, 0);
1154 static SENSOR_DEVICE_ATTR_2_RW(pwm1_stall_disable, stall_disable, 0, 0);
1155 static SENSOR_DEVICE_ATTR_2_RW(pwm2, pwm, INPUT, 1);
1156 static SENSOR_DEVICE_ATTR_2_RW(pwm2_freq, pwmfreq, INPUT, 1);
1157 static SENSOR_DEVICE_ATTR_2_RW(pwm2_enable, pwmctrl, INPUT, 1);
1158 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_channels_temp, pwmchan, INPUT, 1);
1159 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_pwm, pwm, MIN, 1);
1160 static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_pwm, pwm, MAX, 1);
1161 static SENSOR_DEVICE_ATTR_2_RW(pwm2_stall_disable, stall_disable, 0, 1);
1162 static SENSOR_DEVICE_ATTR_2_RW(pwm3, pwm, INPUT, 2);
1163 static SENSOR_DEVICE_ATTR_2_RW(pwm3_freq, pwmfreq, INPUT, 2);
1164 static SENSOR_DEVICE_ATTR_2_RW(pwm3_enable, pwmctrl, INPUT, 2);
1165 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_channels_temp, pwmchan, INPUT, 2);
1166 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_pwm, pwm, MIN, 2);
1167 static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_pwm, pwm, MAX, 2);
1168 static SENSOR_DEVICE_ATTR_2_RW(pwm3_stall_disable, stall_disable, 0, 2);
1170 /* Non-standard name, might need revisiting */
1171 static DEVICE_ATTR_RW(pwm_use_point2_pwm_at_crit);
1173 static DEVICE_ATTR_RW(vrm);
1174 static DEVICE_ATTR_RO(cpu0_vid);
1176 static struct attribute *adt7475_attrs[] = {
1177 &sensor_dev_attr_in1_input.dev_attr.attr,
1178 &sensor_dev_attr_in1_max.dev_attr.attr,
1179 &sensor_dev_attr_in1_min.dev_attr.attr,
1180 &sensor_dev_attr_in1_alarm.dev_attr.attr,
1181 &sensor_dev_attr_in2_input.dev_attr.attr,
1182 &sensor_dev_attr_in2_max.dev_attr.attr,
1183 &sensor_dev_attr_in2_min.dev_attr.attr,
1184 &sensor_dev_attr_in2_alarm.dev_attr.attr,
1185 &sensor_dev_attr_temp1_input.dev_attr.attr,
1186 &sensor_dev_attr_temp1_alarm.dev_attr.attr,
1187 &sensor_dev_attr_temp1_fault.dev_attr.attr,
1188 &sensor_dev_attr_temp1_max.dev_attr.attr,
1189 &sensor_dev_attr_temp1_min.dev_attr.attr,
1190 &sensor_dev_attr_temp1_offset.dev_attr.attr,
1191 &sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
1192 &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
1193 &sensor_dev_attr_temp1_crit.dev_attr.attr,
1194 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
1195 &sensor_dev_attr_temp1_smoothing.dev_attr.attr,
1196 &sensor_dev_attr_temp2_input.dev_attr.attr,
1197 &sensor_dev_attr_temp2_alarm.dev_attr.attr,
1198 &sensor_dev_attr_temp2_max.dev_attr.attr,
1199 &sensor_dev_attr_temp2_min.dev_attr.attr,
1200 &sensor_dev_attr_temp2_offset.dev_attr.attr,
1201 &sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
1202 &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
1203 &sensor_dev_attr_temp2_crit.dev_attr.attr,
1204 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
1205 &sensor_dev_attr_temp2_smoothing.dev_attr.attr,
1206 &sensor_dev_attr_temp3_input.dev_attr.attr,
1207 &sensor_dev_attr_temp3_fault.dev_attr.attr,
1208 &sensor_dev_attr_temp3_alarm.dev_attr.attr,
1209 &sensor_dev_attr_temp3_max.dev_attr.attr,
1210 &sensor_dev_attr_temp3_min.dev_attr.attr,
1211 &sensor_dev_attr_temp3_offset.dev_attr.attr,
1212 &sensor_dev_attr_temp3_auto_point1_temp.dev_attr.attr,
1213 &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr,
1214 &sensor_dev_attr_temp3_crit.dev_attr.attr,
1215 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
1216 &sensor_dev_attr_temp3_smoothing.dev_attr.attr,
1217 &sensor_dev_attr_fan1_input.dev_attr.attr,
1218 &sensor_dev_attr_fan1_min.dev_attr.attr,
1219 &sensor_dev_attr_fan1_alarm.dev_attr.attr,
1220 &sensor_dev_attr_fan2_input.dev_attr.attr,
1221 &sensor_dev_attr_fan2_min.dev_attr.attr,
1222 &sensor_dev_attr_fan2_alarm.dev_attr.attr,
1223 &sensor_dev_attr_fan3_input.dev_attr.attr,
1224 &sensor_dev_attr_fan3_min.dev_attr.attr,
1225 &sensor_dev_attr_fan3_alarm.dev_attr.attr,
1226 &sensor_dev_attr_pwm1.dev_attr.attr,
1227 &sensor_dev_attr_pwm1_freq.dev_attr.attr,
1228 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1229 &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
1230 &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
1231 &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
1232 &sensor_dev_attr_pwm1_stall_disable.dev_attr.attr,
1233 &sensor_dev_attr_pwm3.dev_attr.attr,
1234 &sensor_dev_attr_pwm3_freq.dev_attr.attr,
1235 &sensor_dev_attr_pwm3_enable.dev_attr.attr,
1236 &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
1237 &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
1238 &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
1239 &sensor_dev_attr_pwm3_stall_disable.dev_attr.attr,
1240 &dev_attr_pwm_use_point2_pwm_at_crit.attr,
1244 static struct attribute *fan4_attrs[] = {
1245 &sensor_dev_attr_fan4_input.dev_attr.attr,
1246 &sensor_dev_attr_fan4_min.dev_attr.attr,
1247 &sensor_dev_attr_fan4_alarm.dev_attr.attr,
1251 static struct attribute *pwm2_attrs[] = {
1252 &sensor_dev_attr_pwm2.dev_attr.attr,
1253 &sensor_dev_attr_pwm2_freq.dev_attr.attr,
1254 &sensor_dev_attr_pwm2_enable.dev_attr.attr,
1255 &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
1256 &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
1257 &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
1258 &sensor_dev_attr_pwm2_stall_disable.dev_attr.attr,
1262 static struct attribute *in0_attrs[] = {
1263 &sensor_dev_attr_in0_input.dev_attr.attr,
1264 &sensor_dev_attr_in0_max.dev_attr.attr,
1265 &sensor_dev_attr_in0_min.dev_attr.attr,
1266 &sensor_dev_attr_in0_alarm.dev_attr.attr,
1270 static struct attribute *in3_attrs[] = {
1271 &sensor_dev_attr_in3_input.dev_attr.attr,
1272 &sensor_dev_attr_in3_max.dev_attr.attr,
1273 &sensor_dev_attr_in3_min.dev_attr.attr,
1274 &sensor_dev_attr_in3_alarm.dev_attr.attr,
1278 static struct attribute *in4_attrs[] = {
1279 &sensor_dev_attr_in4_input.dev_attr.attr,
1280 &sensor_dev_attr_in4_max.dev_attr.attr,
1281 &sensor_dev_attr_in4_min.dev_attr.attr,
1282 &sensor_dev_attr_in4_alarm.dev_attr.attr,
1286 static struct attribute *in5_attrs[] = {
1287 &sensor_dev_attr_in5_input.dev_attr.attr,
1288 &sensor_dev_attr_in5_max.dev_attr.attr,
1289 &sensor_dev_attr_in5_min.dev_attr.attr,
1290 &sensor_dev_attr_in5_alarm.dev_attr.attr,
1294 static struct attribute *vid_attrs[] = {
1295 &dev_attr_cpu0_vid.attr,
1300 static const struct attribute_group adt7475_attr_group = { .attrs = adt7475_attrs };
1301 static const struct attribute_group fan4_attr_group = { .attrs = fan4_attrs };
1302 static const struct attribute_group pwm2_attr_group = { .attrs = pwm2_attrs };
1303 static const struct attribute_group in0_attr_group = { .attrs = in0_attrs };
1304 static const struct attribute_group in3_attr_group = { .attrs = in3_attrs };
1305 static const struct attribute_group in4_attr_group = { .attrs = in4_attrs };
1306 static const struct attribute_group in5_attr_group = { .attrs = in5_attrs };
1307 static const struct attribute_group vid_attr_group = { .attrs = vid_attrs };
1309 static int adt7475_detect(struct i2c_client *client,
1310 struct i2c_board_info *info)
1312 struct i2c_adapter *adapter = client->adapter;
1313 int vendid, devid, devid2;
1316 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
1319 vendid = adt7475_read(REG_VENDID);
1320 devid2 = adt7475_read(REG_DEVID2);
1321 if (vendid != 0x41 || /* Analog Devices */
1322 (devid2 & 0xf8) != 0x68)
1325 devid = adt7475_read(REG_DEVID);
1328 else if (devid == 0x75 && client->addr == 0x2e)
1330 else if (devid == 0x76)
1332 else if ((devid2 & 0xfc) == 0x6c)
1335 dev_dbg(&adapter->dev,
1336 "Couldn't detect an ADT7473/75/76/90 part at "
1337 "0x%02x\n", (unsigned int)client->addr);
1341 strlcpy(info->type, name, I2C_NAME_SIZE);
1346 static int adt7475_update_limits(struct i2c_client *client)
1348 struct adt7475_data *data = i2c_get_clientdata(client);
1352 ret = adt7475_read(REG_CONFIG4);
1355 data->config4 = ret;
1357 ret = adt7475_read(REG_CONFIG5);
1360 data->config5 = ret;
1362 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1363 if (!(data->has_voltage & (1 << i)))
1365 /* Adjust values so they match the input precision */
1366 ret = adt7475_read(VOLTAGE_MIN_REG(i));
1369 data->voltage[MIN][i] = ret << 2;
1371 ret = adt7475_read(VOLTAGE_MAX_REG(i));
1374 data->voltage[MAX][i] = ret << 2;
1377 if (data->has_voltage & (1 << 5)) {
1378 ret = adt7475_read(REG_VTT_MIN);
1381 data->voltage[MIN][5] = ret << 2;
1383 ret = adt7475_read(REG_VTT_MAX);
1386 data->voltage[MAX][5] = ret << 2;
1389 for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1390 /* Adjust values so they match the input precision */
1391 ret = adt7475_read(TEMP_MIN_REG(i));
1394 data->temp[MIN][i] = ret << 2;
1396 ret = adt7475_read(TEMP_MAX_REG(i));
1399 data->temp[MAX][i] = ret << 2;
1401 ret = adt7475_read(TEMP_TMIN_REG(i));
1404 data->temp[AUTOMIN][i] = ret << 2;
1406 ret = adt7475_read(TEMP_THERM_REG(i));
1409 data->temp[THERM][i] = ret << 2;
1411 ret = adt7475_read(TEMP_OFFSET_REG(i));
1414 data->temp[OFFSET][i] = ret;
1416 adt7475_read_hystersis(client);
1418 for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1419 if (i == 3 && !data->has_fan4)
1421 ret = adt7475_read_word(client, TACH_MIN_REG(i));
1424 data->tach[MIN][i] = ret;
1427 for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1428 if (i == 1 && !data->has_pwm2)
1430 ret = adt7475_read(PWM_MAX_REG(i));
1433 data->pwm[MAX][i] = ret;
1435 ret = adt7475_read(PWM_MIN_REG(i));
1438 data->pwm[MIN][i] = ret;
1439 /* Set the channel and control information */
1440 adt7475_read_pwm(client, i);
1443 ret = adt7475_read(TEMP_TRANGE_REG(0));
1446 data->range[0] = ret;
1448 ret = adt7475_read(TEMP_TRANGE_REG(1));
1451 data->range[1] = ret;
1453 ret = adt7475_read(TEMP_TRANGE_REG(2));
1456 data->range[2] = ret;
1461 static int adt7475_probe(struct i2c_client *client,
1462 const struct i2c_device_id *id)
1465 static const char * const names[] = {
1466 [adt7473] = "ADT7473",
1467 [adt7475] = "ADT7475",
1468 [adt7476] = "ADT7476",
1469 [adt7490] = "ADT7490",
1472 struct adt7475_data *data;
1473 struct device *hwmon_dev;
1474 int i, ret = 0, revision, group_num = 0;
1475 u8 config2, config3;
1477 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
1481 mutex_init(&data->lock);
1482 data->client = client;
1483 i2c_set_clientdata(client, data);
1485 if (client->dev.of_node)
1486 chip = (enum chips)of_device_get_match_data(&client->dev);
1488 chip = id->driver_data;
1490 /* Initialize device-specific values */
1493 data->has_voltage = 0x0e; /* in1 to in3 */
1494 revision = adt7475_read(REG_DEVID2) & 0x07;
1497 data->has_voltage = 0x3e; /* in1 to in5 */
1498 revision = adt7475_read(REG_DEVID2) & 0x03;
1499 if (revision == 0x03)
1500 revision += adt7475_read(REG_DEVREV2);
1503 data->has_voltage = 0x06; /* in1, in2 */
1504 revision = adt7475_read(REG_DEVID2) & 0x07;
1507 config3 = adt7475_read(REG_CONFIG3);
1508 /* Pin PWM2 may alternatively be used for ALERT output */
1509 if (!(config3 & CONFIG3_SMBALERT))
1511 /* Meaning of this bit is inverted for the ADT7473-1 */
1512 if (id->driver_data == adt7473 && revision >= 1)
1513 data->has_pwm2 = !data->has_pwm2;
1515 data->config4 = adt7475_read(REG_CONFIG4);
1516 /* Pin TACH4 may alternatively be used for THERM */
1517 if ((data->config4 & CONFIG4_PINFUNC) == 0x0)
1521 * THERM configuration is more complex on the ADT7476 and ADT7490,
1522 * because 2 different pins (TACH4 and +2.5 Vin) can be used for
1525 if (id->driver_data == adt7490) {
1526 if ((data->config4 & CONFIG4_PINFUNC) == 0x1 &&
1527 !(config3 & CONFIG3_THERM))
1530 if (id->driver_data == adt7476 || id->driver_data == adt7490) {
1531 if (!(config3 & CONFIG3_THERM) ||
1532 (data->config4 & CONFIG4_PINFUNC) == 0x1)
1533 data->has_voltage |= (1 << 0); /* in0 */
1537 * On the ADT7476, the +12V input pin may instead be used as VID5,
1538 * and VID pins may alternatively be used as GPIO
1540 if (id->driver_data == adt7476) {
1541 u8 vid = adt7475_read(REG_VID);
1542 if (!(vid & VID_VIDSEL))
1543 data->has_voltage |= (1 << 4); /* in4 */
1545 data->has_vid = !(adt7475_read(REG_CONFIG5) & CONFIG5_VIDGPIO);
1548 /* Voltage attenuators can be bypassed, globally or individually */
1549 config2 = adt7475_read(REG_CONFIG2);
1550 if (config2 & CONFIG2_ATTN) {
1551 data->bypass_attn = (0x3 << 3) | 0x3;
1553 data->bypass_attn = ((data->config4 & CONFIG4_ATTN_IN10) >> 4) |
1554 ((data->config4 & CONFIG4_ATTN_IN43) >> 3);
1556 data->bypass_attn &= data->has_voltage;
1559 * Call adt7475_read_pwm for all pwm's as this will reprogram any
1560 * pwm's which are disabled to manual mode with 0% duty cycle
1562 for (i = 0; i < ADT7475_PWM_COUNT; i++)
1563 adt7475_read_pwm(client, i);
1565 /* Start monitoring */
1569 i2c_smbus_write_byte_data(client, REG_CONFIG1,
1570 adt7475_read(REG_CONFIG1) | 0x01);
1576 data->groups[group_num++] = &adt7475_attr_group;
1578 /* Features that can be disabled individually */
1579 if (data->has_fan4) {
1580 data->groups[group_num++] = &fan4_attr_group;
1582 if (data->has_pwm2) {
1583 data->groups[group_num++] = &pwm2_attr_group;
1585 if (data->has_voltage & (1 << 0)) {
1586 data->groups[group_num++] = &in0_attr_group;
1588 if (data->has_voltage & (1 << 3)) {
1589 data->groups[group_num++] = &in3_attr_group;
1591 if (data->has_voltage & (1 << 4)) {
1592 data->groups[group_num++] = &in4_attr_group;
1594 if (data->has_voltage & (1 << 5)) {
1595 data->groups[group_num++] = &in5_attr_group;
1597 if (data->has_vid) {
1598 data->vrm = vid_which_vrm();
1599 data->groups[group_num] = &vid_attr_group;
1602 /* register device with all the acquired attributes */
1603 hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
1607 if (IS_ERR(hwmon_dev)) {
1608 ret = PTR_ERR(hwmon_dev);
1612 dev_info(&client->dev, "%s device, revision %d\n",
1613 names[id->driver_data], revision);
1614 if ((data->has_voltage & 0x11) || data->has_fan4 || data->has_pwm2)
1615 dev_info(&client->dev, "Optional features:%s%s%s%s%s\n",
1616 (data->has_voltage & (1 << 0)) ? " in0" : "",
1617 (data->has_voltage & (1 << 4)) ? " in4" : "",
1618 data->has_fan4 ? " fan4" : "",
1619 data->has_pwm2 ? " pwm2" : "",
1620 data->has_vid ? " vid" : "");
1621 if (data->bypass_attn)
1622 dev_info(&client->dev, "Bypassing attenuators on:%s%s%s%s\n",
1623 (data->bypass_attn & (1 << 0)) ? " in0" : "",
1624 (data->bypass_attn & (1 << 1)) ? " in1" : "",
1625 (data->bypass_attn & (1 << 3)) ? " in3" : "",
1626 (data->bypass_attn & (1 << 4)) ? " in4" : "");
1628 /* Limits and settings, should never change update more than once */
1629 ret = adt7475_update_limits(client);
1636 static struct i2c_driver adt7475_driver = {
1637 .class = I2C_CLASS_HWMON,
1640 .of_match_table = of_match_ptr(adt7475_of_match),
1642 .probe = adt7475_probe,
1643 .id_table = adt7475_id,
1644 .detect = adt7475_detect,
1645 .address_list = normal_i2c,
1648 static void adt7475_read_hystersis(struct i2c_client *client)
1650 struct adt7475_data *data = i2c_get_clientdata(client);
1652 data->temp[HYSTERSIS][0] = (u16) adt7475_read(REG_REMOTE1_HYSTERSIS);
1653 data->temp[HYSTERSIS][1] = data->temp[HYSTERSIS][0];
1654 data->temp[HYSTERSIS][2] = (u16) adt7475_read(REG_REMOTE2_HYSTERSIS);
1657 static void adt7475_read_pwm(struct i2c_client *client, int index)
1659 struct adt7475_data *data = i2c_get_clientdata(client);
1662 data->pwm[CONTROL][index] = adt7475_read(PWM_CONFIG_REG(index));
1665 * Figure out the internal value for pwmctrl and pwmchan
1666 * based on the current settings
1668 v = (data->pwm[CONTROL][index] >> 5) & 7;
1671 data->pwmctl[index] = 0;
1673 data->pwmctl[index] = 1;
1676 * The fan is disabled - we don't want to
1677 * support that, so change to manual mode and
1678 * set the duty cycle to 0 instead
1680 data->pwm[INPUT][index] = 0;
1681 data->pwm[CONTROL][index] &= ~0xE0;
1682 data->pwm[CONTROL][index] |= (7 << 5);
1684 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1685 data->pwm[INPUT][index]);
1687 i2c_smbus_write_byte_data(client, PWM_CONFIG_REG(index),
1688 data->pwm[CONTROL][index]);
1690 data->pwmctl[index] = 1;
1692 data->pwmctl[index] = 2;
1696 data->pwmchan[index] = 1;
1699 data->pwmchan[index] = 2;
1702 data->pwmchan[index] = 4;
1705 data->pwmchan[index] = 6;
1708 data->pwmchan[index] = 7;
1714 static int adt7475_update_measure(struct device *dev)
1716 struct adt7475_data *data = dev_get_drvdata(dev);
1717 struct i2c_client *client = data->client;
1722 ret = adt7475_read(REG_STATUS2);
1725 data->alarms = ret << 8;
1727 ret = adt7475_read(REG_STATUS1);
1730 data->alarms |= ret;
1732 ret = adt7475_read(REG_EXTEND2);
1738 ret = adt7475_read(REG_EXTEND1);
1744 for (i = 0; i < ADT7475_VOLTAGE_COUNT; i++) {
1745 if (!(data->has_voltage & (1 << i)))
1747 ret = adt7475_read(VOLTAGE_REG(i));
1750 data->voltage[INPUT][i] =
1752 ((ext >> (i * 2)) & 3);
1755 for (i = 0; i < ADT7475_TEMP_COUNT; i++) {
1756 ret = adt7475_read(TEMP_REG(i));
1759 data->temp[INPUT][i] =
1761 ((ext >> ((i + 5) * 2)) & 3);
1764 if (data->has_voltage & (1 << 5)) {
1765 ret = adt7475_read(REG_STATUS4);
1768 data->alarms |= ret << 24;
1770 ret = adt7475_read(REG_EXTEND3);
1775 ret = adt7475_read(REG_VTT);
1778 data->voltage[INPUT][5] = ret << 2 |
1782 for (i = 0; i < ADT7475_TACH_COUNT; i++) {
1783 if (i == 3 && !data->has_fan4)
1785 ret = adt7475_read_word(client, TACH_REG(i));
1788 data->tach[INPUT][i] = ret;
1791 /* Updated by hw when in auto mode */
1792 for (i = 0; i < ADT7475_PWM_COUNT; i++) {
1793 if (i == 1 && !data->has_pwm2)
1795 ret = adt7475_read(PWM_REG(i));
1798 data->pwm[INPUT][i] = ret;
1801 if (data->has_vid) {
1802 ret = adt7475_read(REG_VID);
1805 data->vid = ret & 0x3f;
1811 static struct adt7475_data *adt7475_update_device(struct device *dev)
1813 struct adt7475_data *data = dev_get_drvdata(dev);
1816 mutex_lock(&data->lock);
1818 /* Measurement values update every 2 seconds */
1819 if (time_after(jiffies, data->measure_updated + HZ * 2) ||
1821 ret = adt7475_update_measure(dev);
1823 data->valid = false;
1824 mutex_unlock(&data->lock);
1825 return ERR_PTR(ret);
1827 data->measure_updated = jiffies;
1831 mutex_unlock(&data->lock);
1836 module_i2c_driver(adt7475_driver);
1838 MODULE_AUTHOR("Advanced Micro Devices, Inc");
1839 MODULE_DESCRIPTION("adt7475 driver");
1840 MODULE_LICENSE("GPL");