diff options
| author | Constantine Shulyupin <const@MakeLinux.com> | 2015-07-08 00:40:10 +0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2015-08-09 13:44:26 -0700 |
| commit | 5102f022688ccd59b1fe4efc8a46ec3aca02dfc5 (patch) | |
| tree | e9e4c217bbdb746119877625e656c2965e9366e9 | |
| parent | 3e40b8602aa5309e0b117701c36971367af40682 (diff) | |
hwmon: (nct7802) Add pwmX_enable attribute
Introduced REG_SMARTFAN_EN, SMARTFAN_EN_SHIFT, pwmX_enable,
show_pwm_enable, store_pwm_enable.
Signed-off-by: Constantine Shulyupin <const@MakeLinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| -rw-r--r-- | drivers/hwmon/nct7802.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c index 1c80aa48ee04..f4908bb228b8 100644 --- a/drivers/hwmon/nct7802.c +++ b/drivers/hwmon/nct7802.c @@ -53,6 +53,8 @@ static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = { #define REG_PECI_ENABLE 0x23 #define REG_FAN_ENABLE 0x24 #define REG_VMON_ENABLE 0x25 +#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 @@ -151,6 +153,41 @@ static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr, return err ? : count; } +static ssize_t show_pwm_enable(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 store_pwm_enable(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) { @@ -793,6 +830,14 @@ static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x60); static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x61); static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x62); +/* 7.2.95... Temperature to Fan mapping Relationships Register */ +static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable, + store_pwm_enable, 0); +static SENSOR_DEVICE_ATTR(pwm2_enable, S_IRUGO | S_IWUSR, show_pwm_enable, + store_pwm_enable, 1); +static SENSOR_DEVICE_ATTR(pwm3_enable, S_IRUGO | S_IWUSR, show_pwm_enable, + store_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, @@ -832,10 +877,13 @@ static struct attribute_group nct7802_fan_group = { }; 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 |