| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Darrick J. Wong | 3189 | 49.01% | 7 | 17.95% |
| Chris Packham | 2925 | 44.95% | 4 | 10.26% |
| Jean Delvare | 106 | 1.63% | 3 | 7.69% |
| Joshua Scott | 105 | 1.61% | 3 | 7.69% |
| Axel Lin | 87 | 1.34% | 4 | 10.26% |
| Guenter Roeck | 48 | 0.74% | 4 | 10.26% |
| Dan Carpenter | 10 | 0.15% | 1 | 2.56% |
| Frans Meulenbroeks | 7 | 0.11% | 1 | 2.56% |
| Joe Perches | 7 | 0.11% | 1 | 2.56% |
| Julia Lawall | 6 | 0.09% | 1 | 2.56% |
| Armin Wolf | 4 | 0.06% | 1 | 2.56% |
| Linus Torvalds (pre-git) | 2 | 0.03% | 1 | 2.56% |
| Thomas Gleixner | 2 | 0.03% | 1 | 2.56% |
| Tony Jones | 2 | 0.03% | 1 | 2.56% |
| Uwe Kleine-König | 2 | 0.03% | 2 | 5.13% |
| Kees Cook | 2 | 0.03% | 1 | 2.56% |
| Linus Torvalds | 1 | 0.02% | 1 | 2.56% |
| Krzysztof Kozlowski | 1 | 0.02% | 1 | 2.56% |
| Mark M. Hoffman | 1 | 0.02% | 1 | 2.56% |
| Total | 6507 | 39 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * A hwmon driver for the Analog Devices ADT7470 * Copyright (C) 2007 IBM * * Author: Darrick J. Wong <darrick.wong@oracle.com> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/delay.h> #include <linux/log2.h> #include <linux/kthread.h> #include <linux/regmap.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/util_macros.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END }; /* ADT7470 registers */ #define ADT7470_REG_BASE_ADDR 0x20 #define ADT7470_REG_TEMP_BASE_ADDR 0x20 #define ADT7470_REG_TEMP_MAX_ADDR 0x29 #define ADT7470_REG_FAN_BASE_ADDR 0x2A #define ADT7470_REG_FAN_MAX_ADDR 0x31 #define ADT7470_REG_PWM_BASE_ADDR 0x32 #define ADT7470_REG_PWM_MAX_ADDR 0x35 #define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38 #define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B #define ADT7470_REG_CFG 0x40 #define ADT7470_STRT_MASK 0x01 #define ADT7470_TEST_MASK 0x02 #define ADT7470_FSPD_MASK 0x04 #define ADT7470_T05_STB_MASK 0x80 #define ADT7470_REG_ALARM1 0x41 #define ADT7470_R1T_ALARM 0x01 #define ADT7470_R2T_ALARM 0x02 #define ADT7470_R3T_ALARM 0x04 #define ADT7470_R4T_ALARM 0x08 #define ADT7470_R5T_ALARM 0x10 #define ADT7470_R6T_ALARM 0x20 #define ADT7470_R7T_ALARM 0x40 #define ADT7470_OOL_ALARM 0x80 #define ADT7470_REG_ALARM2 0x42 #define ADT7470_R8T_ALARM 0x01 #define ADT7470_R9T_ALARM 0x02 #define ADT7470_R10T_ALARM 0x04 #define ADT7470_FAN1_ALARM 0x10 #define ADT7470_FAN2_ALARM 0x20 #define ADT7470_FAN3_ALARM 0x40 #define ADT7470_FAN4_ALARM 0x80 #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44 #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57 #define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58 #define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F #define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60 #define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67 #define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68 #define ADT7470_REG_PWM12_CFG 0x68 #define ADT7470_PWM2_AUTO_MASK 0x40 #define ADT7470_PWM1_AUTO_MASK 0x80 #define ADT7470_PWM_AUTO_MASK 0xC0 #define ADT7470_REG_PWM34_CFG 0x69 #define ADT7470_PWM3_AUTO_MASK 0x40 #define ADT7470_PWM4_AUTO_MASK 0x80 #define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A #define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71 #define ADT7470_REG_CFG_2 0x74 #define ADT7470_REG_ACOUSTICS12 0x75 #define ADT7470_REG_ACOUSTICS34 0x76 #define ADT7470_REG_DEVICE 0x3D #define ADT7470_REG_VENDOR 0x3E #define ADT7470_REG_REVISION 0x3F #define ADT7470_REG_ALARM1_MASK 0x72 #define ADT7470_REG_ALARM2_MASK 0x73 #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D #define ADT7470_REG_MAX_ADDR 0x81 #define ADT7470_TEMP_COUNT 10 #define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x)) #define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2)) #define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \ ((x) * 2) + 1) #define ADT7470_FAN_COUNT 4 #define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2)) #define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2)) #define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2)) #define ADT7470_PWM_COUNT 4 #define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x)) #define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x)) #define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x)) #define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x)) #define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2)) #define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \ ((x) / 2)) #define ALARM2(x) ((x) << 8) #define ADT7470_VENDOR 0x41 #define ADT7470_DEVICE 0x70 /* datasheet only mentions a revision 2 */ #define ADT7470_REVISION 0x02 /* "all temps" according to hwmon sysfs interface spec */ #define ADT7470_PWM_ALL_TEMPS 0x3FF /* How often do we reread sensors values? (In jiffies) */ #define SENSOR_REFRESH_INTERVAL (5 * HZ) /* How often do we reread sensor limit values? (In jiffies) */ #define LIMIT_REFRESH_INTERVAL (60 * HZ) /* Wait at least 200ms per sensor for 10 sensors */ #define TEMP_COLLECTION_TIME 2000 /* auto update thing won't fire more than every 2s */ #define AUTO_UPDATE_INTERVAL 2000 /* datasheet says to divide this number by the fan reading to get fan rpm */ #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x)) #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM #define FAN_PERIOD_INVALID 65535 #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID) /* Config registers 1 and 2 include fields for selecting the PWM frequency */ #define ADT7470_CFG_LF 0x40 #define ADT7470_FREQ_MASK 0x70 #define ADT7470_FREQ_SHIFT 4 struct adt7470_data { struct regmap *regmap; struct mutex lock; char sensors_valid; char limits_valid; unsigned long sensors_last_updated; /* In jiffies */ unsigned long limits_last_updated; /* In jiffies */ int num_temp_sensors; /* -1 = probe */ int temperatures_probed; s8 temp[ADT7470_TEMP_COUNT]; s8 temp_min[ADT7470_TEMP_COUNT]; s8 temp_max[ADT7470_TEMP_COUNT]; u16 fan[ADT7470_FAN_COUNT]; u16 fan_min[ADT7470_FAN_COUNT]; u16 fan_max[ADT7470_FAN_COUNT]; u16 alarm; u16 alarms_mask; u8 force_pwm_max; u8 pwm[ADT7470_PWM_COUNT]; u8 pwm_max[ADT7470_PWM_COUNT]; u8 pwm_automatic[ADT7470_PWM_COUNT]; u8 pwm_min[ADT7470_PWM_COUNT]; s8 pwm_tmin[ADT7470_PWM_COUNT]; u8 pwm_auto_temp[ADT7470_PWM_COUNT]; struct task_struct *auto_update; unsigned int auto_update_interval; }; /* * 16-bit registers on the ADT7470 are low-byte first. The data sheet says * that the low byte must be read before the high byte. */ static inline int adt7470_read_word_data(struct adt7470_data *data, unsigned int reg, unsigned int *val) { u8 regval[2]; int err; err = regmap_bulk_read(data->regmap, reg, ®val, 2); if (err < 0) return err; *val = regval[0] | (regval[1] << 8); return 0; } static inline int adt7470_write_word_data(struct adt7470_data *data, unsigned int reg, unsigned int val) { u8 regval[2]; regval[0] = val & 0xFF; regval[1] = val >> 8; return regmap_bulk_write(data->regmap, reg, ®val, 2); } /* Probe for temperature sensors. Assumes lock is held */ static int adt7470_read_temperatures(struct adt7470_data *data) { unsigned long res; unsigned int pwm_cfg[2]; int err; int i; u8 pwm[ADT7470_FAN_COUNT]; /* save pwm[1-4] config register */ err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(0), &pwm_cfg[0]); if (err < 0) return err; err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(2), &pwm_cfg[1]); if (err < 0) return err; /* set manual pwm to whatever it is set to now */ err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &pwm[0], ADT7470_PWM_COUNT); if (err < 0) return err; /* put pwm in manual mode */ err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(0), ADT7470_PWM_AUTO_MASK, 0); if (err < 0) return err; err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(2), ADT7470_PWM_AUTO_MASK, 0); if (err < 0) return err; /* write pwm control to whatever it was */ err = regmap_bulk_write(data->regmap, ADT7470_REG_PWM(0), &pwm[0], ADT7470_PWM_COUNT); if (err < 0) return err; /* start reading temperature sensors */ err = regmap_update_bits(data->regmap, ADT7470_REG_CFG, ADT7470_T05_STB_MASK, ADT7470_T05_STB_MASK); if (err < 0) return err; /* Delay is 200ms * number of temp sensors. */ res = msleep_interruptible((data->num_temp_sensors >= 0 ? data->num_temp_sensors * 200 : TEMP_COLLECTION_TIME)); /* done reading temperature sensors */ err = regmap_update_bits(data->regmap, ADT7470_REG_CFG, ADT7470_T05_STB_MASK, 0); if (err < 0) return err; /* restore pwm[1-4] config registers */ err = regmap_write(data->regmap, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]); if (err < 0) return err; err = regmap_write(data->regmap, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]); if (err < 0) return err; if (res) return -EAGAIN; /* Only count fans if we have to */ if (data->num_temp_sensors >= 0) return 0; err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0], ADT7470_TEMP_COUNT); if (err < 0) return err; for (i = 0; i < ADT7470_TEMP_COUNT; i++) { if (data->temp[i]) data->num_temp_sensors = i + 1; } data->temperatures_probed = 1; return 0; } static int adt7470_update_thread(void *p) { struct i2c_client *client = p; struct adt7470_data *data = i2c_get_clientdata(client); while (!kthread_should_stop()) { mutex_lock(&data->lock); adt7470_read_temperatures(data); mutex_unlock(&data->lock); if (kthread_should_stop()) break; schedule_timeout_interruptible(msecs_to_jiffies(data->auto_update_interval)); } return 0; } static int adt7470_update_sensors(struct adt7470_data *data) { unsigned int val; int err; int i; if (!data->temperatures_probed) err = adt7470_read_temperatures(data); else err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0], ADT7470_TEMP_COUNT); if (err < 0) return err; for (i = 0; i < ADT7470_FAN_COUNT; i++) { err = adt7470_read_word_data(data, ADT7470_REG_FAN(i), &val); if (err < 0) return err; data->fan[i] = val; } err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &data->pwm[0], ADT7470_PWM_COUNT); if (err < 0) return err; for (i = 0; i < ADT7470_PWM_COUNT; i++) { unsigned int mask; if (i % 2) mask = ADT7470_PWM2_AUTO_MASK; else mask = ADT7470_PWM1_AUTO_MASK; err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(i), &val); if (err < 0) return err; data->pwm_automatic[i] = !!(val & mask); err = regmap_read(data->regmap, ADT7470_REG_PWM_AUTO_TEMP(i), &val); if (err < 0) return err; if (!(i % 2)) data->pwm_auto_temp[i] = val >> 4; else data->pwm_auto_temp[i] = val & 0xF; } err = regmap_read(data->regmap, ADT7470_REG_CFG, &val); if (err < 0) return err; data->force_pwm_max = !!(val & ADT7470_FSPD_MASK); err = regmap_read(data->regmap, ADT7470_REG_ALARM1, &val); if (err < 0) return err; data->alarm = val; if (data->alarm & ADT7470_OOL_ALARM) { err = regmap_read(data->regmap, ADT7470_REG_ALARM2, &val); if (err < 0) return err; data->alarm |= ALARM2(val); } err = adt7470_read_word_data(data, ADT7470_REG_ALARM1_MASK, &val); if (err < 0) return err; data->alarms_mask = val; return 0; } static int adt7470_update_limits(struct adt7470_data *data) { unsigned int val; int err; int i; for (i = 0; i < ADT7470_TEMP_COUNT; i++) { err = regmap_read(data->regmap, ADT7470_TEMP_MIN_REG(i), &val); if (err < 0) return err; data->temp_min[i] = (s8)val; err = regmap_read(data->regmap, ADT7470_TEMP_MAX_REG(i), &val); if (err < 0) return err; data->temp_max[i] = (s8)val; } for (i = 0; i < ADT7470_FAN_COUNT; i++) { err = adt7470_read_word_data(data, ADT7470_REG_FAN_MIN(i), &val); if (err < 0) return err; data->fan_min[i] = val; err = adt7470_read_word_data(data, ADT7470_REG_FAN_MAX(i), &val); if (err < 0) return err; data->fan_max[i] = val; } for (i = 0; i < ADT7470_PWM_COUNT; i++) { err = regmap_read(data->regmap, ADT7470_REG_PWM_MAX(i), &val); if (err < 0) return err; data->pwm_max[i] = val; err = regmap_read(data->regmap, ADT7470_REG_PWM_MIN(i), &val); if (err < 0) return err; data->pwm_min[i] = val; err = regmap_read(data->regmap, ADT7470_REG_PWM_TMIN(i), &val); if (err < 0) return err; data->pwm_tmin[i] = (s8)val; } return 0; } static struct adt7470_data *adt7470_update_device(struct device *dev) { struct adt7470_data *data = dev_get_drvdata(dev); unsigned long local_jiffies = jiffies; int need_sensors = 1; int need_limits = 1; int err; /* * Figure out if we need to update the shadow registers. * Lockless means that we may occasionally report out of * date data. */ if (time_before(local_jiffies, data->sensors_last_updated + SENSOR_REFRESH_INTERVAL) && data->sensors_valid) need_sensors = 0; if (time_before(local_jiffies, data->limits_last_updated + LIMIT_REFRESH_INTERVAL) && data->limits_valid) need_limits = 0; if (!need_sensors && !need_limits) return data; mutex_lock(&data->lock); if (need_sensors) { err = adt7470_update_sensors(data); if (err < 0) goto out; data->sensors_last_updated = local_jiffies; data->sensors_valid = 1; } if (need_limits) { err = adt7470_update_limits(data); if (err < 0) goto out; data->limits_last_updated = local_jiffies; data->limits_valid = 1; } out: mutex_unlock(&data->lock); return err < 0 ? ERR_PTR(err) : data; } static ssize_t auto_update_interval_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return sprintf(buf, "%d\n", data->auto_update_interval); } static ssize_t auto_update_interval_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct adt7470_data *data = dev_get_drvdata(dev); long temp; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, 0, 60000); mutex_lock(&data->lock); data->auto_update_interval = temp; mutex_unlock(&data->lock); return count; } static ssize_t num_temp_sensors_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return sprintf(buf, "%d\n", data->num_temp_sensors); } static ssize_t num_temp_sensors_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct adt7470_data *data = dev_get_drvdata(dev); long temp; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, -1, 10); mutex_lock(&data->lock); data->num_temp_sensors = temp; if (temp < 0) data->temperatures_probed = 0; mutex_unlock(&data->lock); return count; } static int adt7470_temp_read(struct device *dev, u32 attr, int channel, long *val) { struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); switch (attr) { case hwmon_temp_input: *val = 1000 * data->temp[channel]; break; case hwmon_temp_min: *val = 1000 * data->temp_min[channel]; break; case hwmon_temp_max: *val = 1000 * data->temp_max[channel]; break; case hwmon_temp_alarm: *val = !!(data->alarm & channel); break; default: return -EOPNOTSUPP; } return 0; } static int adt7470_temp_write(struct device *dev, u32 attr, int channel, long val) { struct adt7470_data *data = dev_get_drvdata(dev); int err; val = clamp_val(val, -128000, 127000); val = DIV_ROUND_CLOSEST(val, 1000); switch (attr) { case hwmon_temp_min: mutex_lock(&data->lock); data->temp_min[channel] = val; err = regmap_write(data->regmap, ADT7470_TEMP_MIN_REG(channel), val); mutex_unlock(&data->lock); break; case hwmon_temp_max: mutex_lock(&data->lock); data->temp_max[channel] = val; err = regmap_write(data->regmap, ADT7470_TEMP_MAX_REG(channel), val); mutex_unlock(&data->lock); break; default: return -EOPNOTSUPP; } return err; } static ssize_t alarm_mask_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return sprintf(buf, "%x\n", data->alarms_mask); } static ssize_t alarm_mask_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct adt7470_data *data = dev_get_drvdata(dev); long mask; int err; if (kstrtoul(buf, 0, &mask)) return -EINVAL; if (mask & ~0xffff) return -EINVAL; mutex_lock(&data->lock); data->alarms_mask = mask; err = adt7470_write_word_data(data, ADT7470_REG_ALARM1_MASK, mask); mutex_unlock(&data->lock); return err < 0 ? err : count; } static int adt7470_fan_read(struct device *dev, u32 attr, int channel, long *val) { struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); switch (attr) { case hwmon_fan_input: if (FAN_DATA_VALID(data->fan[channel])) *val = FAN_PERIOD_TO_RPM(data->fan[channel]); else *val = 0; break; case hwmon_fan_min: if (FAN_DATA_VALID(data->fan_min[channel])) *val = FAN_PERIOD_TO_RPM(data->fan_min[channel]); else *val = 0; break; case hwmon_fan_max: if (FAN_DATA_VALID(data->fan_max[channel])) *val = FAN_PERIOD_TO_RPM(data->fan_max[channel]); else *val = 0; break; case hwmon_fan_alarm: *val = !!(data->alarm & (1 << (12 + channel))); break; default: return -EOPNOTSUPP; } return 0; } static int adt7470_fan_write(struct device *dev, u32 attr, int channel, long val) { struct adt7470_data *data = dev_get_drvdata(dev); int err; if (val <= 0) return -EINVAL; val = FAN_RPM_TO_PERIOD(val); val = clamp_val(val, 1, 65534); switch (attr) { case hwmon_fan_min: mutex_lock(&data->lock); data->fan_min[channel] = val; err = adt7470_write_word_data(data, ADT7470_REG_FAN_MIN(channel), val); mutex_unlock(&data->lock); break; case hwmon_fan_max: mutex_lock(&data->lock); data->fan_max[channel] = val; err = adt7470_write_word_data(data, ADT7470_REG_FAN_MAX(channel), val); mutex_unlock(&data->lock); break; default: return -EOPNOTSUPP; } return err; } static ssize_t force_pwm_max_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return sprintf(buf, "%d\n", data->force_pwm_max); } static ssize_t force_pwm_max_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct adt7470_data *data = dev_get_drvdata(dev); long temp; int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; mutex_lock(&data->lock); data->force_pwm_max = temp; err = regmap_update_bits(data->regmap, ADT7470_REG_CFG, ADT7470_FSPD_MASK, temp ? ADT7470_FSPD_MASK : 0); mutex_unlock(&data->lock); return err < 0 ? err : count; } /* These are the valid PWM frequencies to the nearest Hz */ static const int adt7470_freq_map[] = { 11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500 }; static int pwm1_freq_get(struct device *dev) { struct adt7470_data *data = dev_get_drvdata(dev); unsigned int cfg_reg_1, cfg_reg_2; int index; int err; mutex_lock(&data->lock); err = regmap_read(data->regmap, ADT7470_REG_CFG, &cfg_reg_1); if (err < 0) goto out; err = regmap_read(data->regmap, ADT7470_REG_CFG_2, &cfg_reg_2); if (err < 0) goto out; mutex_unlock(&data->lock); index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT; if (!(cfg_reg_1 & ADT7470_CFG_LF)) index += 8; if (index >= ARRAY_SIZE(adt7470_freq_map)) index = ARRAY_SIZE(adt7470_freq_map) - 1; return adt7470_freq_map[index]; out: mutex_unlock(&data->lock); return err; } static int adt7470_pwm_read(struct device *dev, u32 attr, int channel, long *val) { struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); switch (attr) { case hwmon_pwm_input: *val = data->pwm[channel]; break; case hwmon_pwm_enable: *val = 1 + data->pwm_automatic[channel]; break; case hwmon_pwm_freq: *val = pwm1_freq_get(dev); break; default: return -EOPNOTSUPP; } return 0; } static int pwm1_freq_set(struct device *dev, long freq) { struct adt7470_data *data = dev_get_drvdata(dev); unsigned int low_freq = ADT7470_CFG_LF; int index; int err; /* Round the user value given to the closest available frequency */ index = find_closest(freq, adt7470_freq_map, ARRAY_SIZE(adt7470_freq_map)); if (index >= 8) { index -= 8; low_freq = 0; } mutex_lock(&data->lock); /* Configuration Register 1 */ err = regmap_update_bits(data->regmap, ADT7470_REG_CFG, ADT7470_CFG_LF, low_freq); if (err < 0) goto out; /* Configuration Register 2 */ err = regmap_update_bits(data->regmap, ADT7470_REG_CFG_2, ADT7470_FREQ_MASK, index << ADT7470_FREQ_SHIFT); out: mutex_unlock(&data->lock); return err; } static int adt7470_pwm_write(struct device *dev, u32 attr, int channel, long val) { struct adt7470_data *data = dev_get_drvdata(dev); unsigned int pwm_auto_reg_mask; int err; switch (attr) { case hwmon_pwm_input: val = clamp_val(val, 0, 255); mutex_lock(&data->lock); data->pwm[channel] = val; err = regmap_write(data->regmap, ADT7470_REG_PWM(channel), data->pwm[channel]); mutex_unlock(&data->lock); break; case hwmon_pwm_enable: if (channel % 2) pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK; else pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK; if (val != 2 && val != 1) return -EINVAL; val--; mutex_lock(&data->lock); data->pwm_automatic[channel] = val; err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(channel), pwm_auto_reg_mask, val ? pwm_auto_reg_mask : 0); mutex_unlock(&data->lock); break; case hwmon_pwm_freq: err = pwm1_freq_set(dev, val); break; default: return -EOPNOTSUPP; } return err; } static ssize_t pwm_max_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return sprintf(buf, "%d\n", data->pwm_max[attr->index]); } static ssize_t pwm_max_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); long temp; int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->pwm_max[attr->index] = temp; err = regmap_write(data->regmap, ADT7470_REG_PWM_MAX(attr->index), temp); mutex_unlock(&data->lock); return err < 0 ? err : count; } static ssize_t pwm_min_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return sprintf(buf, "%d\n", data->pwm_min[attr->index]); } static ssize_t pwm_min_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); long temp; int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->pwm_min[attr->index] = temp; err = regmap_write(data->regmap, ADT7470_REG_PWM_MIN(attr->index), temp); mutex_unlock(&data->lock); return err < 0 ? err : count; } static ssize_t pwm_tmax_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); /* the datasheet says that tmax = tmin + 20C */ return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index])); } static ssize_t pwm_tmin_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); if (IS_ERR(data)) return PTR_ERR(data); return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]); } static ssize_t pwm_tmin_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); long temp; int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, -128000, 127000); temp = DIV_ROUND_CLOSEST(temp, 1000); mutex_lock(&data->lock); data->pwm_tmin[attr->index] = temp; err = regmap_write(data->regmap, ADT7470_REG_PWM_TMIN(attr->index), temp); mutex_unlock(&data->lock); return err < 0 ? err : count; } static ssize_t pwm_auto_temp_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = adt7470_update_device(dev); u8 ctrl; if (IS_ERR(data)) return PTR_ERR(data); ctrl = data->pwm_auto_temp[attr->index]; if (ctrl) return sprintf(buf, "%d\n", 1 << (ctrl - 1)); else return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS); } static int cvt_auto_temp(int input) { if (input == ADT7470_PWM_ALL_TEMPS) return 0; if (input < 1 || !is_power_of_2(input)) return -EINVAL; return ilog2(input) + 1; } static ssize_t pwm_auto_temp_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); struct adt7470_data *data = dev_get_drvdata(dev); int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index); unsigned int mask, val; long temp; int err; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = cvt_auto_temp(temp); if (temp < 0) return temp; mutex_lock(&data->lock); data->pwm_automatic[attr->index] = temp; if (!(attr->index % 2)) { mask = 0xF0; val = (temp << 4) & 0xF0; } else { mask = 0x0F; val = temp & 0x0F; } err = regmap_update_bits(data->regmap, pwm_auto_reg, mask, val); mutex_unlock(&data->lock); return err < 0 ? err : count; } static DEVICE_ATTR_RW(alarm_mask); static DEVICE_ATTR_RW(num_temp_sensors); static DEVICE_ATTR_RW(auto_update_interval); static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3); static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0); static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1); static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2); static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3); static struct attribute *adt7470_attrs[] = { &dev_attr_alarm_mask.attr, &dev_attr_num_temp_sensors.attr, &dev_attr_auto_update_interval.attr, &sensor_dev_attr_force_pwm_max.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, &sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr, &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr, &sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr, &sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr, &sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr, NULL }; ATTRIBUTE_GROUPS(adt7470); static int adt7470_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { switch (type) { case hwmon_temp: return adt7470_temp_read(dev, attr, channel, val); case hwmon_fan: return adt7470_fan_read(dev, attr, channel, val); case hwmon_pwm: return adt7470_pwm_read(dev, attr, channel, val); default: return -EOPNOTSUPP; } } static int adt7470_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { switch (type) { case hwmon_temp: return adt7470_temp_write(dev, attr, channel, val); case hwmon_fan: return adt7470_fan_write(dev, attr, channel, val); case hwmon_pwm: return adt7470_pwm_write(dev, attr, channel, val); default: return -EOPNOTSUPP; } } static umode_t adt7470_is_visible(const void *_data, enum hwmon_sensor_types type, u32 attr, int channel) { umode_t mode = 0; switch (type) { case hwmon_temp: switch (attr) { case hwmon_temp: case hwmon_temp_alarm: mode = 0444; break; case hwmon_temp_min: case hwmon_temp_max: mode = 0644; break; default: break; } break; case hwmon_fan: switch (attr) { case hwmon_fan_input: case hwmon_fan_alarm: mode = 0444; break; case hwmon_fan_min: case hwmon_fan_max: mode = 0644; break; default: break; } break; case hwmon_pwm: switch (attr) { case hwmon_pwm_input: case hwmon_pwm_enable: mode = 0644; break; case hwmon_pwm_freq: if (channel == 0) mode = 0644; else mode = 0; break; default: break; } break; default: break; } return mode; } static const struct hwmon_ops adt7470_hwmon_ops = { .is_visible = adt7470_is_visible, .read = adt7470_read, .write = adt7470_write, }; static const struct hwmon_channel_info * const adt7470_info[] = { HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM, HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM), HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM, HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM), HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT | HWMON_PWM_ENABLE | HWMON_PWM_FREQ, HWMON_PWM_INPUT | HWMON_PWM_ENABLE, HWMON_PWM_INPUT | HWMON_PWM_ENABLE, HWMON_PWM_INPUT | HWMON_PWM_ENABLE), NULL }; static const struct hwmon_chip_info adt7470_chip_info = { .ops = &adt7470_hwmon_ops, .info = adt7470_info, }; /* Return 0 if detection is successful, -ENODEV otherwise */ static int adt7470_detect(struct i2c_client *client, struct i2c_board_info *info) { struct i2c_adapter *adapter = client->adapter; int vendor, device, revision; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR); if (vendor != ADT7470_VENDOR) return -ENODEV; device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE); if (device != ADT7470_DEVICE) return -ENODEV; revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION); if (revision != ADT7470_REVISION) return -ENODEV; strscpy(info->type, "adt7470", I2C_NAME_SIZE); return 0; } static const struct regmap_config adt7470_regmap_config = { .reg_bits = 8, .val_bits = 8, .use_single_read = true, .use_single_write = true, }; static int adt7470_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct adt7470_data *data; struct device *hwmon_dev; int err; data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL); if (!data) return -ENOMEM; data->num_temp_sensors = -1; data->auto_update_interval = AUTO_UPDATE_INTERVAL; data->regmap = devm_regmap_init_i2c(client, &adt7470_regmap_config); if (IS_ERR(data->regmap)) return PTR_ERR(data->regmap); i2c_set_clientdata(client, data); mutex_init(&data->lock); dev_info(&client->dev, "%s chip found\n", client->name); /* Initialize the ADT7470 chip */ err = regmap_update_bits(data->regmap, ADT7470_REG_CFG, ADT7470_STRT_MASK | ADT7470_TEST_MASK, ADT7470_STRT_MASK | ADT7470_TEST_MASK); if (err < 0) return err; /* Register sysfs hooks */ hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data, &adt7470_chip_info, adt7470_groups); if (IS_ERR(hwmon_dev)) return PTR_ERR(hwmon_dev); data->auto_update = kthread_run(adt7470_update_thread, client, "%s", dev_name(hwmon_dev)); if (IS_ERR(data->auto_update)) return PTR_ERR(data->auto_update); return 0; } static void adt7470_remove(struct i2c_client *client) { struct adt7470_data *data = i2c_get_clientdata(client); kthread_stop(data->auto_update); } static const struct i2c_device_id adt7470_id[] = { { "adt7470", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, adt7470_id); static struct i2c_driver adt7470_driver = { .class = I2C_CLASS_HWMON, .driver = { .name = "adt7470", }, .probe = adt7470_probe, .remove = adt7470_remove, .id_table = adt7470_id, .detect = adt7470_detect, .address_list = normal_i2c, }; module_i2c_driver(adt7470_driver); MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>"); MODULE_DESCRIPTION("ADT7470 driver"); MODULE_LICENSE("GPL");
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