diff options
Diffstat (limited to 'drivers/hwmon/nct7802.c')
| -rw-r--r-- | drivers/hwmon/nct7802.c | 1235 |
1 files changed, 1235 insertions, 0 deletions
diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c new file mode 100644 index 0000000000..024cff151c --- /dev/null +++ b/drivers/hwmon/nct7802.c @@ -0,0 +1,1235 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * nct7802 - Driver for Nuvoton NCT7802Y + * + * Copyright (C) 2014 Guenter Roeck <linux@roeck-us.net> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/jiffies.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#define DRVNAME "nct7802" + +static const u8 REG_VOLTAGE[5] = { 0x09, 0x0a, 0x0c, 0x0d, 0x0e }; + +static const u8 REG_VOLTAGE_LIMIT_LSB[2][5] = { + { 0x46, 0x00, 0x40, 0x42, 0x44 }, + { 0x45, 0x00, 0x3f, 0x41, 0x43 }, +}; + +static const u8 REG_VOLTAGE_LIMIT_MSB[5] = { 0x48, 0x00, 0x47, 0x47, 0x48 }; + +static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = { + { 0, 0, 4, 0, 4 }, + { 2, 0, 6, 2, 6 }, +}; + +#define REG_BANK 0x00 +#define REG_TEMP_LSB 0x05 +#define REG_TEMP_PECI_LSB 0x08 +#define REG_VOLTAGE_LOW 0x0f +#define REG_FANCOUNT_LOW 0x13 +#define REG_START 0x21 +#define REG_MODE 0x22 /* 7.2.32 Mode Selection Register */ +#define REG_PECI_ENABLE 0x23 +#define REG_FAN_ENABLE 0x24 +#define REG_VMON_ENABLE 0x25 +#define REG_PWM(x) (0x60 + (x)) +#define REG_SMARTFAN_EN(x) (0x64 + (x) / 2) +#define SMARTFAN_EN_SHIFT(x) ((x) % 2 * 4) +#define REG_VENDOR_ID 0xfd +#define REG_CHIP_ID 0xfe +#define REG_VERSION_ID 0xff + +/* + * Resistance temperature detector (RTD) modes according to 7.2.32 Mode + * Selection Register + */ +#define RTD_MODE_CURRENT 0x1 +#define RTD_MODE_THERMISTOR 0x2 +#define RTD_MODE_VOLTAGE 0x3 + +#define MODE_RTD_MASK 0x3 +#define MODE_LTD_EN 0x40 + +/* + * Bit offset for sensors modes in REG_MODE. + * Valid for index 0..2, indicating RTD1..3. + */ +#define MODE_BIT_OFFSET_RTD(index) ((index) * 2) + +/* + * Data structures and manipulation thereof + */ + +struct nct7802_data { + struct regmap *regmap; + struct mutex access_lock; /* for multi-byte read and write operations */ + u8 in_status; + struct mutex in_alarm_lock; +}; + +static ssize_t temp_type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + unsigned int mode; + int ret; + + ret = regmap_read(data->regmap, REG_MODE, &mode); + if (ret < 0) + return ret; + + return sprintf(buf, "%u\n", (mode >> (2 * sattr->index) & 3) + 2); +} + +static ssize_t temp_type_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + unsigned int type; + int err; + + err = kstrtouint(buf, 0, &type); + if (err < 0) + return err; + if (sattr->index == 2 && type != 4) /* RD3 */ + return -EINVAL; + if (type < 3 || type > 4) + return -EINVAL; + err = regmap_update_bits(data->regmap, REG_MODE, + 3 << 2 * sattr->index, (type - 2) << 2 * sattr->index); + return err ? : count; +} + +static ssize_t pwm_mode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + unsigned int regval; + int ret; + + if (sattr->index > 1) + return sprintf(buf, "1\n"); + + ret = regmap_read(data->regmap, 0x5E, ®val); + if (ret < 0) + return ret; + + return sprintf(buf, "%u\n", !(regval & (1 << sattr->index))); +} + +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 nct7802_data *data = dev_get_drvdata(dev); + unsigned int val; + int ret; + + if (!attr->index) + return sprintf(buf, "255\n"); + + ret = regmap_read(data->regmap, attr->index, &val); + if (ret < 0) + return ret; + + return sprintf(buf, "%d\n", val); +} + +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 nct7802_data *data = dev_get_drvdata(dev); + int err; + u8 val; + + err = kstrtou8(buf, 0, &val); + if (err < 0) + return err; + + err = regmap_write(data->regmap, attr->index, val); + return err ? : count; +} + +static ssize_t pwm_enable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + unsigned int reg, enabled; + int ret; + + ret = regmap_read(data->regmap, REG_SMARTFAN_EN(sattr->index), ®); + if (ret < 0) + return ret; + enabled = reg >> SMARTFAN_EN_SHIFT(sattr->index) & 1; + return sprintf(buf, "%u\n", enabled + 1); +} + +static ssize_t pwm_enable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + u8 val; + int ret; + + ret = kstrtou8(buf, 0, &val); + if (ret < 0) + return ret; + if (val < 1 || val > 2) + return -EINVAL; + ret = regmap_update_bits(data->regmap, REG_SMARTFAN_EN(sattr->index), + 1 << SMARTFAN_EN_SHIFT(sattr->index), + (val - 1) << SMARTFAN_EN_SHIFT(sattr->index)); + return ret ? : count; +} + +static int nct7802_read_temp(struct nct7802_data *data, + u8 reg_temp, u8 reg_temp_low, int *temp) +{ + unsigned int t1, t2 = 0; + int err; + + *temp = 0; + + mutex_lock(&data->access_lock); + err = regmap_read(data->regmap, reg_temp, &t1); + if (err < 0) + goto abort; + t1 <<= 8; + if (reg_temp_low) { /* 11 bit data */ + err = regmap_read(data->regmap, reg_temp_low, &t2); + if (err < 0) + goto abort; + } + t1 |= t2 & 0xe0; + *temp = (s16)t1 / 32 * 125; +abort: + mutex_unlock(&data->access_lock); + return err; +} + +static int nct7802_read_fan(struct nct7802_data *data, u8 reg_fan) +{ + unsigned int f1, f2; + int ret; + + mutex_lock(&data->access_lock); + ret = regmap_read(data->regmap, reg_fan, &f1); + if (ret < 0) + goto abort; + ret = regmap_read(data->regmap, REG_FANCOUNT_LOW, &f2); + if (ret < 0) + goto abort; + ret = (f1 << 5) | (f2 >> 3); + /* convert fan count to rpm */ + if (ret == 0x1fff) /* maximum value, assume fan is stopped */ + ret = 0; + else if (ret) + ret = DIV_ROUND_CLOSEST(1350000U, ret); +abort: + mutex_unlock(&data->access_lock); + return ret; +} + +static int nct7802_read_fan_min(struct nct7802_data *data, u8 reg_fan_low, + u8 reg_fan_high) +{ + unsigned int f1, f2; + int ret; + + mutex_lock(&data->access_lock); + ret = regmap_read(data->regmap, reg_fan_low, &f1); + if (ret < 0) + goto abort; + ret = regmap_read(data->regmap, reg_fan_high, &f2); + if (ret < 0) + goto abort; + ret = f1 | ((f2 & 0xf8) << 5); + /* convert fan count to rpm */ + if (ret == 0x1fff) /* maximum value, assume no limit */ + ret = 0; + else if (ret) + ret = DIV_ROUND_CLOSEST(1350000U, ret); + else + ret = 1350000U; +abort: + mutex_unlock(&data->access_lock); + return ret; +} + +static int nct7802_write_fan_min(struct nct7802_data *data, u8 reg_fan_low, + u8 reg_fan_high, unsigned long limit) +{ + int err; + + if (limit) + limit = DIV_ROUND_CLOSEST(1350000U, limit); + else + limit = 0x1fff; + limit = clamp_val(limit, 0, 0x1fff); + + mutex_lock(&data->access_lock); + err = regmap_write(data->regmap, reg_fan_low, limit & 0xff); + if (err < 0) + goto abort; + + err = regmap_write(data->regmap, reg_fan_high, (limit & 0x1f00) >> 5); +abort: + mutex_unlock(&data->access_lock); + return err; +} + +static u8 nct7802_vmul[] = { 4, 2, 2, 2, 2 }; + +static int nct7802_read_voltage(struct nct7802_data *data, int nr, int index) +{ + unsigned int v1, v2; + int ret; + + mutex_lock(&data->access_lock); + if (index == 0) { /* voltage */ + ret = regmap_read(data->regmap, REG_VOLTAGE[nr], &v1); + if (ret < 0) + goto abort; + ret = regmap_read(data->regmap, REG_VOLTAGE_LOW, &v2); + if (ret < 0) + goto abort; + ret = ((v1 << 2) | (v2 >> 6)) * nct7802_vmul[nr]; + } else { /* limit */ + int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; + + ret = regmap_read(data->regmap, + REG_VOLTAGE_LIMIT_LSB[index - 1][nr], &v1); + if (ret < 0) + goto abort; + ret = regmap_read(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], + &v2); + if (ret < 0) + goto abort; + ret = (v1 | ((v2 << shift) & 0x300)) * nct7802_vmul[nr]; + } +abort: + mutex_unlock(&data->access_lock); + return ret; +} + +static int nct7802_write_voltage(struct nct7802_data *data, int nr, int index, + unsigned long voltage) +{ + int shift = 8 - REG_VOLTAGE_LIMIT_MSB_SHIFT[index - 1][nr]; + int err; + + voltage = clamp_val(voltage, 0, 0x3ff * nct7802_vmul[nr]); + voltage = DIV_ROUND_CLOSEST(voltage, nct7802_vmul[nr]); + + mutex_lock(&data->access_lock); + err = regmap_write(data->regmap, + REG_VOLTAGE_LIMIT_LSB[index - 1][nr], + voltage & 0xff); + if (err < 0) + goto abort; + + err = regmap_update_bits(data->regmap, REG_VOLTAGE_LIMIT_MSB[nr], + 0x0300 >> shift, (voltage & 0x0300) >> shift); +abort: + mutex_unlock(&data->access_lock); + return err; +} + +static ssize_t in_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + int voltage; + + voltage = nct7802_read_voltage(data, sattr->nr, sattr->index); + if (voltage < 0) + return voltage; + + return sprintf(buf, "%d\n", voltage); +} + +static ssize_t in_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + int index = sattr->index; + int nr = sattr->nr; + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err < 0) + return err; + + err = nct7802_write_voltage(data, nr, index, val); + return err ? : count; +} + +static ssize_t in_alarm_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + int volt, min, max, ret; + unsigned int val; + + mutex_lock(&data->in_alarm_lock); + + /* + * The SMI Voltage status register is the only register giving a status + * for voltages. A bit is set for each input crossing a threshold, in + * both direction, but the "inside" or "outside" limits info is not + * available. Also this register is cleared on read. + * Note: this is not explicitly spelled out in the datasheet, but + * from experiment. + * To deal with this we use a status cache with one validity bit and + * one status bit for each input. Validity is cleared at startup and + * each time the register reports a change, and the status is processed + * by software based on current input value and limits. + */ + ret = regmap_read(data->regmap, 0x1e, &val); /* SMI Voltage status */ + if (ret < 0) + goto abort; + + /* invalidate cached status for all inputs crossing a threshold */ + data->in_status &= ~((val & 0x0f) << 4); + + /* if cached status for requested input is invalid, update it */ + if (!(data->in_status & (0x10 << sattr->index))) { + ret = nct7802_read_voltage(data, sattr->nr, 0); + if (ret < 0) + goto abort; + volt = ret; + + ret = nct7802_read_voltage(data, sattr->nr, 1); + if (ret < 0) + goto abort; + min = ret; + + ret = nct7802_read_voltage(data, sattr->nr, 2); + if (ret < 0) + goto abort; + max = ret; + + if (volt < min || volt > max) + data->in_status |= (1 << sattr->index); + else + data->in_status &= ~(1 << sattr->index); + + data->in_status |= 0x10 << sattr->index; + } + + ret = sprintf(buf, "%u\n", !!(data->in_status & (1 << sattr->index))); +abort: + mutex_unlock(&data->in_alarm_lock); + return ret; +} + +static ssize_t temp_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + int err, temp; + + err = nct7802_read_temp(data, sattr->nr, sattr->index, &temp); + if (err < 0) + return err; + + return sprintf(buf, "%d\n", temp); +} + +static ssize_t temp_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + int nr = sattr->nr; + long val; + int err; + + err = kstrtol(buf, 10, &val); + if (err < 0) + return err; + + val = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000); + + err = regmap_write(data->regmap, nr, val & 0xff); + return err ? : count; +} + +static ssize_t fan_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute *sattr = to_sensor_dev_attr(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + int speed; + + speed = nct7802_read_fan(data, sattr->index); + if (speed < 0) + return speed; + + return sprintf(buf, "%d\n", speed); +} + +static ssize_t fan_min_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + int speed; + + speed = nct7802_read_fan_min(data, sattr->nr, sattr->index); + if (speed < 0) + return speed; + + return sprintf(buf, "%d\n", speed); +} + +static ssize_t fan_min_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t count) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err < 0) + return err; + + err = nct7802_write_fan_min(data, sattr->nr, sattr->index, val); + return err ? : count; +} + +static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct nct7802_data *data = dev_get_drvdata(dev); + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + int bit = sattr->index; + unsigned int val; + int ret; + + ret = regmap_read(data->regmap, sattr->nr, &val); + if (ret < 0) + return ret; + + return sprintf(buf, "%u\n", !!(val & (1 << bit))); +} + +static ssize_t +beep_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + unsigned int regval; + int err; + + err = regmap_read(data->regmap, sattr->nr, ®val); + if (err) + return err; + + return sprintf(buf, "%u\n", !!(regval & (1 << sattr->index))); +} + +static ssize_t +beep_store(struct device *dev, struct device_attribute *attr, const char *buf, + size_t count) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct nct7802_data *data = dev_get_drvdata(dev); + unsigned long val; + int err; + + err = kstrtoul(buf, 10, &val); + if (err < 0) + return err; + if (val > 1) + return -EINVAL; + + err = regmap_update_bits(data->regmap, sattr->nr, 1 << sattr->index, + val ? 1 << sattr->index : 0); + return err ? : count; +} + +static SENSOR_DEVICE_ATTR_RW(temp1_type, temp_type, 0); +static SENSOR_DEVICE_ATTR_2_RO(temp1_input, temp, 0x01, REG_TEMP_LSB); +static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 0x31, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp1_max, temp, 0x30, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp1_crit, temp, 0x3a, 0); + +static SENSOR_DEVICE_ATTR_RW(temp2_type, temp_type, 1); +static SENSOR_DEVICE_ATTR_2_RO(temp2_input, temp, 0x02, REG_TEMP_LSB); +static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 0x33, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp2_max, temp, 0x32, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp2_crit, temp, 0x3b, 0); + +static SENSOR_DEVICE_ATTR_RW(temp3_type, temp_type, 2); +static SENSOR_DEVICE_ATTR_2_RO(temp3_input, temp, 0x03, REG_TEMP_LSB); +static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 0x35, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp3_max, temp, 0x34, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp3_crit, temp, 0x3c, 0); + +static SENSOR_DEVICE_ATTR_2_RO(temp4_input, temp, 0x04, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp4_min, temp, 0x37, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp4_max, temp, 0x36, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp4_crit, temp, 0x3d, 0); + +static SENSOR_DEVICE_ATTR_2_RO(temp5_input, temp, 0x06, REG_TEMP_PECI_LSB); +static SENSOR_DEVICE_ATTR_2_RW(temp5_min, temp, 0x39, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp5_max, temp, 0x38, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp5_crit, temp, 0x3e, 0); + +static SENSOR_DEVICE_ATTR_2_RO(temp6_input, temp, 0x07, REG_TEMP_PECI_LSB); + +static SENSOR_DEVICE_ATTR_2_RO(temp1_min_alarm, alarm, 0x18, 0); +static SENSOR_DEVICE_ATTR_2_RO(temp2_min_alarm, alarm, 0x18, 1); +static SENSOR_DEVICE_ATTR_2_RO(temp3_min_alarm, alarm, 0x18, 2); +static SENSOR_DEVICE_ATTR_2_RO(temp4_min_alarm, alarm, 0x18, 3); +static SENSOR_DEVICE_ATTR_2_RO(temp5_min_alarm, alarm, 0x18, 4); + +static SENSOR_DEVICE_ATTR_2_RO(temp1_max_alarm, alarm, 0x19, 0); +static SENSOR_DEVICE_ATTR_2_RO(temp2_max_alarm, alarm, 0x19, 1); +static SENSOR_DEVICE_ATTR_2_RO(temp3_max_alarm, alarm, 0x19, 2); +static SENSOR_DEVICE_ATTR_2_RO(temp4_max_alarm, alarm, 0x19, 3); +static SENSOR_DEVICE_ATTR_2_RO(temp5_max_alarm, alarm, 0x19, 4); + +static SENSOR_DEVICE_ATTR_2_RO(temp1_crit_alarm, alarm, 0x1b, 0); +static SENSOR_DEVICE_ATTR_2_RO(temp2_crit_alarm, alarm, 0x1b, 1); +static SENSOR_DEVICE_ATTR_2_RO(temp3_crit_alarm, alarm, 0x1b, 2); +static SENSOR_DEVICE_ATTR_2_RO(temp4_crit_alarm, alarm, 0x1b, 3); +static SENSOR_DEVICE_ATTR_2_RO(temp5_crit_alarm, alarm, 0x1b, 4); + +static SENSOR_DEVICE_ATTR_2_RO(temp1_fault, alarm, 0x17, 0); +static SENSOR_DEVICE_ATTR_2_RO(temp2_fault, alarm, 0x17, 1); +static SENSOR_DEVICE_ATTR_2_RO(temp3_fault, alarm, 0x17, 2); + +static SENSOR_DEVICE_ATTR_2_RW(temp1_beep, beep, 0x5c, 0); +static SENSOR_DEVICE_ATTR_2_RW(temp2_beep, beep, 0x5c, 1); +static SENSOR_DEVICE_ATTR_2_RW(temp3_beep, beep, 0x5c, 2); +static SENSOR_DEVICE_ATTR_2_RW(temp4_beep, beep, 0x5c, 3); +static SENSOR_DEVICE_ATTR_2_RW(temp5_beep, beep, 0x5c, 4); +static SENSOR_DEVICE_ATTR_2_RW(temp6_beep, beep, 0x5c, 5); + +static struct attribute *nct7802_temp_attrs[] = { + &sensor_dev_attr_temp1_type.dev_attr.attr, + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp1_min.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_fault.dev_attr.attr, + &sensor_dev_attr_temp1_beep.dev_attr.attr, + + &sensor_dev_attr_temp2_type.dev_attr.attr, /* 10 */ + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp2_min.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp2_crit.dev_attr.attr, + &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_fault.dev_attr.attr, + &sensor_dev_attr_temp2_beep.dev_attr.attr, + + &sensor_dev_attr_temp3_type.dev_attr.attr, /* 20 */ + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp3_min.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp3_crit.dev_attr.attr, + &sensor_dev_attr_temp3_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_fault.dev_attr.attr, + &sensor_dev_attr_temp3_beep.dev_attr.attr, + + &sensor_dev_attr_temp4_input.dev_attr.attr, /* 30 */ + &sensor_dev_attr_temp4_min.dev_attr.attr, + &sensor_dev_attr_temp4_max.dev_attr.attr, + &sensor_dev_attr_temp4_crit.dev_attr.attr, + &sensor_dev_attr_temp4_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_beep.dev_attr.attr, + + &sensor_dev_attr_temp5_input.dev_attr.attr, /* 38 */ + &sensor_dev_attr_temp5_min.dev_attr.attr, + &sensor_dev_attr_temp5_max.dev_attr.attr, + &sensor_dev_attr_temp5_crit.dev_attr.attr, + &sensor_dev_attr_temp5_min_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp5_beep.dev_attr.attr, + + &sensor_dev_attr_temp6_input.dev_attr.attr, /* 46 */ + &sensor_dev_attr_temp6_beep.dev_attr.attr, + + NULL +}; + +static umode_t nct7802_temp_is_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct nct7802_data *data = dev_get_drvdata(dev); + unsigned int reg; + int err; + + err = regmap_read(data->regmap, REG_MODE, ®); + if (err < 0) + return 0; + + if (index < 10 && + (reg & 03) != 0x01 && (reg & 0x03) != 0x02) /* RD1 */ + return 0; + + if (index >= 10 && index < 20 && + (reg & 0x0c) != 0x04 && (reg & 0x0c) != 0x08) /* RD2 */ + return 0; + if (index >= 20 && index < 30 && (reg & 0x30) != 0x20) /* RD3 */ + return 0; + + if (index >= 30 && index < 38) /* local */ + return attr->mode; + + err = regmap_read(data->regmap, REG_PECI_ENABLE, ®); + if (err < 0) + return 0; + + if (index >= 38 && index < 46 && !(reg & 0x01)) /* PECI 0 */ + return 0; + + if (index >= 46 && !(reg & 0x02)) /* PECI 1 */ + return 0; + + return attr->mode; +} + +static const struct attribute_group nct7802_temp_group = { + .attrs = nct7802_temp_attrs, + .is_visible = nct7802_temp_is_visible, +}; + +static SENSOR_DEVICE_ATTR_2_RO(in0_input, in, 0, 0); +static SENSOR_DEVICE_ATTR_2_RW(in0_min, in, 0, 1); +static SENSOR_DEVICE_ATTR_2_RW(in0_max, in, 0, 2); +static SENSOR_DEVICE_ATTR_2_RO(in0_alarm, in_alarm, 0, 3); +static SENSOR_DEVICE_ATTR_2_RW(in0_beep, beep, 0x5a, 3); + +static SENSOR_DEVICE_ATTR_2_RO(in1_input, in, 1, 0); + +static SENSOR_DEVICE_ATTR_2_RO(in2_input, in, 2, 0); +static SENSOR_DEVICE_ATTR_2_RW(in2_min, in, 2, 1); +static SENSOR_DEVICE_ATTR_2_RW(in2_max, in, 2, 2); +static SENSOR_DEVICE_ATTR_2_RO(in2_alarm, in_alarm, 2, 0); +static SENSOR_DEVICE_ATTR_2_RW(in2_beep, beep, 0x5a, 0); + +static SENSOR_DEVICE_ATTR_2_RO(in3_input, in, 3, 0); +static SENSOR_DEVICE_ATTR_2_RW(in3_min, in, 3, 1); +static SENSOR_DEVICE_ATTR_2_RW(in3_max, in, 3, 2); +static SENSOR_DEVICE_ATTR_2_RO(in3_alarm, in_alarm, 3, 1); +static SENSOR_DEVICE_ATTR_2_RW(in3_beep, beep, 0x5a, 1); + +static SENSOR_DEVICE_ATTR_2_RO(in4_input, in, 4, 0); +static SENSOR_DEVICE_ATTR_2_RW(in4_min, in, 4, 1); +static SENSOR_DEVICE_ATTR_2_RW(in4_max, in, 4, 2); +static SENSOR_DEVICE_ATTR_2_RO(in4_alarm, in_alarm, 4, 2); +static SENSOR_DEVICE_ATTR_2_RW(in4_beep, beep, 0x5a, 2); + +static struct attribute *nct7802_in_attrs[] = { + &sensor_dev_attr_in0_input.dev_attr.attr, + &sensor_dev_attr_in0_min.dev_attr.attr, + &sensor_dev_attr_in0_max.dev_attr.attr, + &sensor_dev_attr_in0_alarm.dev_attr.attr, + &sensor_dev_attr_in0_beep.dev_attr.attr, + + &sensor_dev_attr_in1_input.dev_attr.attr, /* 5 */ + + &sensor_dev_attr_in2_input.dev_attr.attr, /* 6 */ + &sensor_dev_attr_in2_min.dev_attr.attr, + &sensor_dev_attr_in2_max.dev_attr.attr, + &sensor_dev_attr_in2_alarm.dev_attr.attr, + &sensor_dev_attr_in2_beep.dev_attr.attr, + + &sensor_dev_attr_in3_input.dev_attr.attr, /* 11 */ + &sensor_dev_attr_in3_min.dev_attr.attr, + &sensor_dev_attr_in3_max.dev_attr.attr, + &sensor_dev_attr_in3_alarm.dev_attr.attr, + &sensor_dev_attr_in3_beep.dev_attr.attr, + + &sensor_dev_attr_in4_input.dev_attr.attr, /* 16 */ + &sensor_dev_attr_in4_min.dev_attr.attr, + &sensor_dev_attr_in4_max.dev_attr.attr, + &sensor_dev_attr_in4_alarm.dev_attr.attr, + &sensor_dev_attr_in4_beep.dev_attr.attr, + + NULL, +}; + +static umode_t nct7802_in_is_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct nct7802_data *data = dev_get_drvdata(dev); + unsigned int reg; + int err; + + if (index < 6) /* VCC, VCORE */ + return attr->mode; + + err = regmap_read(data->regmap, REG_MODE, ®); + if (err < 0) + return 0; + + if (index >= 6 && index < 11 && (reg & 0x03) != 0x03) /* VSEN1 */ + return 0; + if (index >= 11 && index < 16 && (reg & 0x0c) != 0x0c) /* VSEN2 */ + return 0; + if (index >= 16 && (reg & 0x30) != 0x30) /* VSEN3 */ + return 0; + + return attr->mode; +} + +static const struct attribute_group nct7802_in_group = { + .attrs = nct7802_in_attrs, + .is_visible = nct7802_in_is_visible, +}; + +static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0x10); +static SENSOR_DEVICE_ATTR_2_RW(fan1_min, fan_min, 0x49, 0x4c); +static SENSOR_DEVICE_ATTR_2_RO(fan1_alarm, alarm, 0x1a, 0); +static SENSOR_DEVICE_ATTR_2_RW(fan1_beep, beep, 0x5b, 0); +static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 0x11); +static SENSOR_DEVICE_ATTR_2_RW(fan2_min, fan_min, 0x4a, 0x4d); +static SENSOR_DEVICE_ATTR_2_RO(fan2_alarm, alarm, 0x1a, 1); +static SENSOR_DEVICE_ATTR_2_RW(fan2_beep, beep, 0x5b, 1); +static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 0x12); +static SENSOR_DEVICE_ATTR_2_RW(fan3_min, fan_min, 0x4b, 0x4e); +static SENSOR_DEVICE_ATTR_2_RO(fan3_alarm, alarm, 0x1a, 2); +static SENSOR_DEVICE_ATTR_2_RW(fan3_beep, beep, 0x5b, 2); + +/* 7.2.89 Fan Control Output Type */ +static SENSOR_DEVICE_ATTR_RO(pwm1_mode, pwm_mode, 0); +static SENSOR_DEVICE_ATTR_RO(pwm2_mode, pwm_mode, 1); +static SENSOR_DEVICE_ATTR_RO(pwm3_mode, pwm_mode, 2); + +/* 7.2.91... Fan Control Output Value */ +static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, REG_PWM(0)); +static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, REG_PWM(1)); +static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, REG_PWM(2)); + +/* 7.2.95... Temperature to Fan mapping Relationships Register */ +static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0); +static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1); +static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2); + +static struct attribute *nct7802_fan_attrs[] = { + &sensor_dev_attr_fan1_input.dev_attr.attr, + &sensor_dev_attr_fan1_min.dev_attr.attr, + &sensor_dev_attr_fan1_alarm.dev_attr.attr, + &sensor_dev_attr_fan1_beep.dev_attr.attr, + &sensor_dev_attr_fan2_input.dev_attr.attr, + &sensor_dev_attr_fan2_min.dev_attr.attr, + &sensor_dev_attr_fan2_alarm.dev_attr.attr, + &sensor_dev_attr_fan2_beep.dev_attr.attr, + &sensor_dev_attr_fan3_input.dev_attr.attr, + &sensor_dev_attr_fan3_min.dev_attr.attr, + &sensor_dev_attr_fan3_alarm.dev_attr.attr, + &sensor_dev_attr_fan3_beep.dev_attr.attr, + + NULL +}; + +static umode_t nct7802_fan_is_visible(struct kobject *kobj, + struct attribute *attr, int index) +{ + struct device *dev = kobj_to_dev(kobj); + struct nct7802_data *data = dev_get_drvdata(dev); + int fan = index / 4; /* 4 attributes per fan */ + unsigned int reg; + int err; + + err = regmap_read(data->regmap, REG_FAN_ENABLE, ®); + if (err < 0 || !(reg & (1 << fan))) + return 0; + + return attr->mode; +} + +static const struct attribute_group nct7802_fan_group = { + .attrs = nct7802_fan_attrs, + .is_visible = nct7802_fan_is_visible, +}; + +static struct attribute *nct7802_pwm_attrs[] = { + &sensor_dev_attr_pwm1_enable.dev_attr.attr, + &sensor_dev_attr_pwm1_mode.dev_attr.attr, + &sensor_dev_attr_pwm1.dev_attr.attr, + &sensor_dev_attr_pwm2_enable.dev_attr.attr, + &sensor_dev_attr_pwm2_mode.dev_attr.attr, + &sensor_dev_attr_pwm2.dev_attr.attr, + &sensor_dev_attr_pwm3_enable.dev_attr.attr, + &sensor_dev_attr_pwm3_mode.dev_attr.attr, + &sensor_dev_attr_pwm3.dev_attr.attr, + NULL +}; + +static const struct attribute_group nct7802_pwm_group = { + .attrs = nct7802_pwm_attrs, +}; + +/* 7.2.115... 0x80-0x83, 0x84 Temperature (X-axis) transition */ +static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point1_temp, temp, 0x80, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point2_temp, temp, 0x81, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point3_temp, temp, 0x82, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point4_temp, temp, 0x83, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm1_auto_point5_temp, temp, 0x84, 0); + +/* 7.2.120... 0x85-0x88 PWM (Y-axis) transition */ +static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm, 0x85); +static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm, 0x86); +static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point3_pwm, pwm, 0x87); +static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point4_pwm, pwm, 0x88); +static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point5_pwm, pwm, 0); + +/* 7.2.124 Table 2 X-axis Transition Point 1 Register */ +static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point1_temp, temp, 0x90, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point2_temp, temp, 0x91, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point3_temp, temp, 0x92, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point4_temp, temp, 0x93, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm2_auto_point5_temp, temp, 0x94, 0); + +/* 7.2.129 Table 2 Y-axis Transition Point 1 Register */ +static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm, 0x95); +static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm, 0x96); +static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point3_pwm, pwm, 0x97); +static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point4_pwm, pwm, 0x98); +static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point5_pwm, pwm, 0); + +/* 7.2.133 Table 3 X-axis Transition Point 1 Register */ +static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point1_temp, temp, 0xA0, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point2_temp, temp, 0xA1, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point3_temp, temp, 0xA2, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point4_temp, temp, 0xA3, 0); +static SENSOR_DEVICE_ATTR_2_RW(pwm3_auto_point5_temp, temp, 0xA4, 0); + +/* 7.2.138 Table 3 Y-axis Transition Point 1 Register */ +static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm, 0xA5); +static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm, 0xA6); +static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point3_pwm, pwm, 0xA7); +static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point4_pwm, pwm, 0xA8); +static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point5_pwm, pwm, 0); + +static struct attribute *nct7802_auto_point_attrs[] = { + &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr, + + &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr, + &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr, + + &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr, + + &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr, + &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr, + + &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr, + + &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr, + &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr, + + NULL +}; + +static const struct attribute_group nct7802_auto_point_group = { + .attrs = nct7802_auto_point_attrs, +}; + +static const struct attribute_group *nct7802_groups[] = { + &nct7802_temp_group, + &nct7802_in_group, + &nct7802_fan_group, + &nct7802_pwm_group, + &nct7802_auto_point_group, + NULL +}; + +static int nct7802_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + int reg; + + /* + * Chip identification registers are only available in bank 0, + * so only attempt chip detection if bank 0 is selected + */ + reg = i2c_smbus_read_byte_data(client, REG_BANK); + if (reg != 0x00) + return -ENODEV; + + reg = i2c_smbus_read_byte_data(client, REG_VENDOR_ID); + if (reg != 0x50) + return -ENODEV; + + reg = i2c_smbus_read_byte_data(client, REG_CHIP_ID); + if (reg != 0xc3) + return -ENODEV; + + reg = i2c_smbus_read_byte_data(client, REG_VERSION_ID); + if (reg < 0 || (reg & 0xf0) != 0x20) + return -ENODEV; + + /* Also validate lower bits of voltage and temperature registers */ + reg = i2c_smbus_read_byte_data(client, REG_TEMP_LSB); + if (reg < 0 || (reg & 0x1f)) + return -ENODEV; + + reg = i2c_smbus_read_byte_data(client, REG_TEMP_PECI_LSB); + if (reg < 0 || (reg & 0x3f)) + return -ENODEV; + + reg = i2c_smbus_read_byte_data(client, REG_VOLTAGE_LOW); + if (reg < 0 || (reg & 0x3f)) + return -ENODEV; + + strscpy(info->type, "nct7802", I2C_NAME_SIZE); + return 0; +} + +static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg) +{ + return (reg != REG_BANK && reg <= 0x20) || + (reg >= REG_PWM(0) && reg <= REG_PWM(2)); +} + +static const struct regmap_config nct7802_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .cache_type = REGCACHE_RBTREE, + .volatile_reg = nct7802_regmap_is_volatile, +}; + +static int nct7802_get_channel_config(struct device *dev, + struct device_node *node, u8 *mode_mask, + u8 *mode_val) +{ + u32 reg; + const char *type_str, *md_str; + u8 md; + + if (!node->name || of_node_cmp(node->name, "channel")) + return 0; + + if (of_property_read_u32(node, "reg", ®)) { + dev_err(dev, "Could not read reg value for '%s'\n", + node->full_name); + return -EINVAL; + } + + if (reg > 3) { + dev_err(dev, "Invalid reg (%u) in '%s'\n", reg, + node->full_name); + return -EINVAL; + } + + if (reg == 0) { + if (!of_device_is_available(node)) + *mode_val &= ~MODE_LTD_EN; + else + *mode_val |= MODE_LTD_EN; + *mode_mask |= MODE_LTD_EN; + return 0; + } + + /* At this point we have reg >= 1 && reg <= 3 */ + + if (!of_device_is_available(node)) { + *mode_val &= ~(MODE_RTD_MASK << MODE_BIT_OFFSET_RTD(reg - 1)); + *mode_mask |= MODE_RTD_MASK << MODE_BIT_OFFSET_RTD(reg - 1); + return 0; + } + + if (of_property_read_string(node, "sensor-type", &type_str)) { + dev_err(dev, "No type for '%s'\n", node->full_name); + return -EINVAL; + } + + if (!strcmp(type_str, "voltage")) { + *mode_val |= (RTD_MODE_VOLTAGE & MODE_RTD_MASK) + << MODE_BIT_OFFSET_RTD(reg - 1); + *mode_mask |= MODE_RTD_MASK << MODE_BIT_OFFSET_RTD(reg - 1); + return 0; + } + + if (strcmp(type_str, "temperature")) { + dev_err(dev, "Invalid type '%s' for '%s'\n", type_str, + node->full_name); + return -EINVAL; + } + + if (reg == 3) { + /* RTD3 only supports thermistor mode */ + md = RTD_MODE_THERMISTOR; + } else { + if (of_property_read_string(node, "temperature-mode", + &md_str)) { + dev_err(dev, "No mode for '%s'\n", node->full_name); + return -EINVAL; + } + + if (!strcmp(md_str, "thermal-diode")) + md = RTD_MODE_CURRENT; + else if (!strcmp(md_str, "thermistor")) + md = RTD_MODE_THERMISTOR; + else { + dev_err(dev, "Invalid mode '%s' for '%s'\n", md_str, + node->full_name); + return -EINVAL; + } + } + + *mode_val |= (md & MODE_RTD_MASK) << MODE_BIT_OFFSET_RTD(reg - 1); + *mode_mask |= MODE_RTD_MASK << MODE_BIT_OFFSET_RTD(reg - 1); + + return 0; +} + +static int nct7802_configure_channels(struct device *dev, + struct nct7802_data *data) +{ + /* Enable local temperature sensor by default */ + u8 mode_mask = MODE_LTD_EN, mode_val = MODE_LTD_EN; + struct device_node *node; + int err; + + if (dev->of_node) { + for_each_child_of_node(dev->of_node, node) { + err = nct7802_get_channel_config(dev, node, &mode_mask, + &mode_val); + if (err) { + of_node_put(node); + return err; + } + } + } + + return regmap_update_bits(data->regmap, REG_MODE, mode_mask, mode_val); +} + +static int nct7802_init_chip(struct device *dev, struct nct7802_data *data) +{ + int err; + + /* Enable ADC */ + err = regmap_update_bits(data->regmap, REG_START, 0x01, 0x01); + if (err) + return err; + + err = nct7802_configure_channels(dev, data); + if (err) + return err; + + /* Enable Vcore and VCC voltage monitoring */ + return regmap_update_bits(data->regmap, REG_VMON_ENABLE, 0x03, 0x03); +} + +static int nct7802_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct nct7802_data *data; + struct device *hwmon_dev; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->regmap = devm_regmap_init_i2c(client, &nct7802_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + mutex_init(&data->access_lock); + mutex_init(&data->in_alarm_lock); + + ret = nct7802_init_chip(dev, data); + if (ret < 0) + return ret; + + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + data, + nct7802_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +static const unsigned short nct7802_address_list[] = { + 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END +}; + +static const struct i2c_device_id nct7802_idtable[] = { + { "nct7802", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, nct7802_idtable); + +static struct i2c_driver nct7802_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = DRVNAME, + }, + .detect = nct7802_detect, + .probe = nct7802_probe, + .id_table = nct7802_idtable, + .address_list = nct7802_address_list, +}; + +module_i2c_driver(nct7802_driver); + +MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>"); +MODULE_DESCRIPTION("NCT7802Y Hardware Monitoring Driver"); +MODULE_LICENSE("GPL v2"); |