| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Darrick J. Wong | 5974 | 84.41% | 7 | 23.33% |
| Joshua Scott | 480 | 6.78% | 3 | 10.00% |
| Axel Lin | 261 | 3.69% | 4 | 13.33% |
| Guenter Roeck | 229 | 3.24% | 4 | 13.33% |
| Jean Delvare | 87 | 1.23% | 2 | 6.67% |
| Frans Meulenbroeks | 13 | 0.18% | 1 | 3.33% |
| Julia Lawall | 12 | 0.17% | 1 | 3.33% |
| Joe Perches | 9 | 0.13% | 1 | 3.33% |
| Tejun Heo | 3 | 0.04% | 1 | 3.33% |
| Thomas Gleixner | 2 | 0.03% | 1 | 3.33% |
| Tony Jones | 2 | 0.03% | 1 | 3.33% |
| Kees Cook | 2 | 0.03% | 1 | 3.33% |
| Curt Brune | 1 | 0.01% | 1 | 3.33% |
| Mark M. Hoffman | 1 | 0.01% | 1 | 3.33% |
| Robert P. J. Day | 1 | 0.01% | 1 | 3.33% |
| Total | 7077 | 30 |
// 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/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_FSPD_MASK 0x04 #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 i2c_client *client; 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 i2c_client *client, u8 reg) { u16 foo; foo = i2c_smbus_read_byte_data(client, reg); foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8); return foo; } static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg, u16 value) { return i2c_smbus_write_byte_data(client, reg, value & 0xFF) || i2c_smbus_write_byte_data(client, reg + 1, value >> 8); } /* Probe for temperature sensors. Assumes lock is held */ static int adt7470_read_temperatures(struct i2c_client *client, struct adt7470_data *data) { unsigned long res; int i; u8 cfg, pwm[4], pwm_cfg[2]; /* save pwm[1-4] config register */ pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0)); pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2)); /* set manual pwm to whatever it is set to now */ for (i = 0; i < ADT7470_FAN_COUNT; i++) pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i)); /* put pwm in manual mode */ i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK)); i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK)); /* write pwm control to whatever it was */ for (i = 0; i < ADT7470_FAN_COUNT; i++) i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]); /* start reading temperature sensors */ cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); cfg |= 0x80; i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); /* 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 */ cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); cfg &= ~0x80; i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg); /* restore pwm[1-4] config registers */ i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]); i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]); if (res) { pr_err("ha ha, interrupted\n"); return -EAGAIN; } /* Only count fans if we have to */ if (data->num_temp_sensors >= 0) return 0; for (i = 0; i < ADT7470_TEMP_COUNT; i++) { data->temp[i] = i2c_smbus_read_byte_data(client, ADT7470_TEMP_REG(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(client, data); mutex_unlock(&data->lock); set_current_state(TASK_INTERRUPTIBLE); if (kthread_should_stop()) break; schedule_timeout(msecs_to_jiffies(data->auto_update_interval)); } return 0; } static struct adt7470_data *adt7470_update_device(struct device *dev) { struct adt7470_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; unsigned long local_jiffies = jiffies; u8 cfg; int i; int need_sensors = 1; int need_limits = 1; /* * 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) goto no_sensor_update; if (!data->temperatures_probed) adt7470_read_temperatures(client, data); else for (i = 0; i < ADT7470_TEMP_COUNT; i++) data->temp[i] = i2c_smbus_read_byte_data(client, ADT7470_TEMP_REG(i)); for (i = 0; i < ADT7470_FAN_COUNT; i++) data->fan[i] = adt7470_read_word_data(client, ADT7470_REG_FAN(i)); for (i = 0; i < ADT7470_PWM_COUNT; i++) { int reg; int reg_mask; data->pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i)); if (i % 2) reg_mask = ADT7470_PWM2_AUTO_MASK; else reg_mask = ADT7470_PWM1_AUTO_MASK; reg = ADT7470_REG_PWM_CFG(i); if (i2c_smbus_read_byte_data(client, reg) & reg_mask) data->pwm_automatic[i] = 1; else data->pwm_automatic[i] = 0; reg = ADT7470_REG_PWM_AUTO_TEMP(i); cfg = i2c_smbus_read_byte_data(client, reg); if (!(i % 2)) data->pwm_auto_temp[i] = cfg >> 4; else data->pwm_auto_temp[i] = cfg & 0xF; } if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) & ADT7470_FSPD_MASK) data->force_pwm_max = 1; else data->force_pwm_max = 0; data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1); if (data->alarm & ADT7470_OOL_ALARM) data->alarm |= ALARM2(i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM2)); data->alarms_mask = adt7470_read_word_data(client, ADT7470_REG_ALARM1_MASK); data->sensors_last_updated = local_jiffies; data->sensors_valid = 1; no_sensor_update: if (!need_limits) goto out; for (i = 0; i < ADT7470_TEMP_COUNT; i++) { data->temp_min[i] = i2c_smbus_read_byte_data(client, ADT7470_TEMP_MIN_REG(i)); data->temp_max[i] = i2c_smbus_read_byte_data(client, ADT7470_TEMP_MAX_REG(i)); } for (i = 0; i < ADT7470_FAN_COUNT; i++) { data->fan_min[i] = adt7470_read_word_data(client, ADT7470_REG_FAN_MIN(i)); data->fan_max[i] = adt7470_read_word_data(client, ADT7470_REG_FAN_MAX(i)); } for (i = 0; i < ADT7470_PWM_COUNT; i++) { data->pwm_max[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_MAX(i)); data->pwm_min[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_MIN(i)); data->pwm_tmin[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_TMIN(i)); } data->limits_last_updated = local_jiffies; data->limits_valid = 1; out: mutex_unlock(&data->lock); return 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); 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); 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 ssize_t temp_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); return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]); } static ssize_t temp_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); struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, -128000, 127000); temp = DIV_ROUND_CLOSEST(temp, 1000); mutex_lock(&data->lock); data->temp_min[attr->index] = temp; i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index), temp); mutex_unlock(&data->lock); return count; } static ssize_t temp_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); return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]); } static ssize_t temp_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); struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, -128000, 127000); temp = DIV_ROUND_CLOSEST(temp, 1000); mutex_lock(&data->lock); data->temp_max[attr->index] = temp; i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index), temp); mutex_unlock(&data->lock); return count; } static ssize_t 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); return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]); } static ssize_t alarm_mask_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); 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; if (kstrtoul(buf, 0, &mask)) return -EINVAL; if (mask & ~0xffff) return -EINVAL; mutex_lock(&data->lock); data->alarms_mask = mask; adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask); mutex_unlock(&data->lock); return count; } static ssize_t fan_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 (FAN_DATA_VALID(data->fan_max[attr->index])) return sprintf(buf, "%d\n", FAN_PERIOD_TO_RPM(data->fan_max[attr->index])); else return sprintf(buf, "0\n"); } static ssize_t fan_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); struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp) || !temp) return -EINVAL; temp = FAN_RPM_TO_PERIOD(temp); temp = clamp_val(temp, 1, 65534); mutex_lock(&data->lock); data->fan_max[attr->index] = temp; adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp); mutex_unlock(&data->lock); return count; } static ssize_t fan_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 (FAN_DATA_VALID(data->fan_min[attr->index])) return sprintf(buf, "%d\n", FAN_PERIOD_TO_RPM(data->fan_min[attr->index])); else return sprintf(buf, "0\n"); } static ssize_t fan_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); struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp) || !temp) return -EINVAL; temp = FAN_RPM_TO_PERIOD(temp); temp = clamp_val(temp, 1, 65534); mutex_lock(&data->lock); data->fan_min[attr->index] = temp; adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp); mutex_unlock(&data->lock); return count; } static ssize_t fan_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 (FAN_DATA_VALID(data->fan[attr->index])) return sprintf(buf, "%d\n", FAN_PERIOD_TO_RPM(data->fan[attr->index])); else return sprintf(buf, "0\n"); } static ssize_t force_pwm_max_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); 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); struct i2c_client *client = data->client; long temp; u8 reg; if (kstrtol(buf, 10, &temp)) return -EINVAL; mutex_lock(&data->lock); data->force_pwm_max = temp; reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); if (temp) reg |= ADT7470_FSPD_MASK; else reg &= ~ADT7470_FSPD_MASK; i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg); mutex_unlock(&data->lock); return count; } static ssize_t pwm_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); return sprintf(buf, "%d\n", data->pwm[attr->index]); } static ssize_t pwm_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); struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->pwm[attr->index] = temp; i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp); mutex_unlock(&data->lock); return 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 ssize_t pwm1_freq_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct adt7470_data *data = adt7470_update_device(dev); unsigned char cfg_reg_1; unsigned char cfg_reg_2; int index; mutex_lock(&data->lock); cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG); cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2); 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 scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]); } static ssize_t pwm1_freq_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { struct adt7470_data *data = dev_get_drvdata(dev); struct i2c_client *client = data->client; long freq; int index; int low_freq = ADT7470_CFG_LF; unsigned char val; if (kstrtol(buf, 10, &freq)) return -EINVAL; /* 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 */ val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, (val & ~ADT7470_CFG_LF) | low_freq); /* Configuration Register 2 */ val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2); i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2, (val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT)); mutex_unlock(&data->lock); return count; } 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); 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); struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->pwm_max[attr->index] = temp; i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index), temp); mutex_unlock(&data->lock); return 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); 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); struct i2c_client *client = data->client; long temp; if (kstrtol(buf, 10, &temp)) return -EINVAL; temp = clamp_val(temp, 0, 255); mutex_lock(&data->lock); data->pwm_min[attr->index] = temp; i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index), temp); mutex_unlock(&data->lock); return 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); /* 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); 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); struct i2c_client *client = data->client; long temp; 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; i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index), temp); mutex_unlock(&data->lock); return count; } static ssize_t pwm_auto_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); return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]); } static ssize_t pwm_auto_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); struct i2c_client *client = data->client; int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index); int pwm_auto_reg_mask; long temp; u8 reg; if (kstrtol(buf, 10, &temp)) return -EINVAL; if (attr->index % 2) pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK; else pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK; if (temp != 2 && temp != 1) return -EINVAL; temp--; mutex_lock(&data->lock); data->pwm_automatic[attr->index] = temp; reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); if (temp) reg |= pwm_auto_reg_mask; else reg &= ~pwm_auto_reg_mask; i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); mutex_unlock(&data->lock); return 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 = 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); struct i2c_client *client = data->client; int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index); long temp; u8 reg; 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; reg = i2c_smbus_read_byte_data(client, pwm_auto_reg); if (!(attr->index % 2)) { reg &= 0xF; reg |= (temp << 4) & 0xF0; } else { reg &= 0xF0; reg |= temp & 0xF; } i2c_smbus_write_byte_data(client, pwm_auto_reg, reg); mutex_unlock(&data->lock); return count; } static ssize_t alarm_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 (data->alarm & attr->index) return sprintf(buf, "1\n"); else return sprintf(buf, "0\n"); } 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(temp1_max, temp_max, 0); static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3); static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4); static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5); static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6); static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7); static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8); static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9); static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3); static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4); static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5); static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6); static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7); static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8); static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9); static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3); static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4); static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5); static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6); static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7); static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8); static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9); static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM); static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM); static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM); static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM); static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM); static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM); static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM); static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM)); static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM)); static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM)); static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0); static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1); static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2); static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3); static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0); static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1); static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2); static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3); static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0); static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1); static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2); static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3); static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM)); static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM)); static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM)); static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM)); static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0); static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0); static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1); static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2); static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3); static DEVICE_ATTR_RW(pwm1_freq); 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_enable, pwm_auto, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 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_temp1_max.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, &sensor_dev_attr_temp3_max.dev_attr.attr, &sensor_dev_attr_temp4_max.dev_attr.attr, &sensor_dev_attr_temp5_max.dev_attr.attr, &sensor_dev_attr_temp6_max.dev_attr.attr, &sensor_dev_attr_temp7_max.dev_attr.attr, &sensor_dev_attr_temp8_max.dev_attr.attr, &sensor_dev_attr_temp9_max.dev_attr.attr, &sensor_dev_attr_temp10_max.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &sensor_dev_attr_temp3_min.dev_attr.attr, &sensor_dev_attr_temp4_min.dev_attr.attr, &sensor_dev_attr_temp5_min.dev_attr.attr, &sensor_dev_attr_temp6_min.dev_attr.attr, &sensor_dev_attr_temp7_min.dev_attr.attr, &sensor_dev_attr_temp8_min.dev_attr.attr, &sensor_dev_attr_temp9_min.dev_attr.attr, &sensor_dev_attr_temp10_min.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp4_input.dev_attr.attr, &sensor_dev_attr_temp5_input.dev_attr.attr, &sensor_dev_attr_temp6_input.dev_attr.attr, &sensor_dev_attr_temp7_input.dev_attr.attr, &sensor_dev_attr_temp8_input.dev_attr.attr, &sensor_dev_attr_temp9_input.dev_attr.attr, &sensor_dev_attr_temp10_input.dev_attr.attr, &sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp3_alarm.dev_attr.attr, &sensor_dev_attr_temp4_alarm.dev_attr.attr, &sensor_dev_attr_temp5_alarm.dev_attr.attr, &sensor_dev_attr_temp6_alarm.dev_attr.attr, &sensor_dev_attr_temp7_alarm.dev_attr.attr, &sensor_dev_attr_temp8_alarm.dev_attr.attr, &sensor_dev_attr_temp9_alarm.dev_attr.attr, &sensor_dev_attr_temp10_alarm.dev_attr.attr, &sensor_dev_attr_fan1_max.dev_attr.attr, &sensor_dev_attr_fan2_max.dev_attr.attr, &sensor_dev_attr_fan3_max.dev_attr.attr, &sensor_dev_attr_fan4_max.dev_attr.attr, &sensor_dev_attr_fan1_min.dev_attr.attr, &sensor_dev_attr_fan2_min.dev_attr.attr, &sensor_dev_attr_fan3_min.dev_attr.attr, &sensor_dev_attr_fan4_min.dev_attr.attr, &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan2_input.dev_attr.attr, &sensor_dev_attr_fan3_input.dev_attr.attr, &sensor_dev_attr_fan4_input.dev_attr.attr, &sensor_dev_attr_fan1_alarm.dev_attr.attr, &sensor_dev_attr_fan2_alarm.dev_attr.attr, &sensor_dev_attr_fan3_alarm.dev_attr.attr, &sensor_dev_attr_fan4_alarm.dev_attr.attr, &sensor_dev_attr_force_pwm_max.dev_attr.attr, &sensor_dev_attr_pwm1.dev_attr.attr, &dev_attr_pwm1_freq.attr, &sensor_dev_attr_pwm2.dev_attr.attr, &sensor_dev_attr_pwm3.dev_attr.attr, &sensor_dev_attr_pwm4.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_enable.dev_attr.attr, &sensor_dev_attr_pwm2_enable.dev_attr.attr, &sensor_dev_attr_pwm3_enable.dev_attr.attr, &sensor_dev_attr_pwm4_enable.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); /* 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; strlcpy(info->type, "adt7470", I2C_NAME_SIZE); return 0; } static void adt7470_init_client(struct i2c_client *client) { int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG); if (reg < 0) { dev_err(&client->dev, "cannot read configuration register\n"); } else { /* start monitoring (and do a self-test) */ i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3); } } static int adt7470_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct device *dev = &client->dev; struct adt7470_data *data; struct device *hwmon_dev; 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; i2c_set_clientdata(client, data); data->client = client; mutex_init(&data->lock); dev_info(&client->dev, "%s chip found\n", client->name); /* Initialize the ADT7470 chip */ adt7470_init_client(client); /* Register sysfs hooks */ hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, data, 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 int adt7470_remove(struct i2c_client *client) { struct adt7470_data *data = i2c_get_clientdata(client); kthread_stop(data->auto_update); return 0; } 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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