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hwmon: (nct7802) Add pwm control
Added fan output control registers. Modes of operation are PWM (default) and DC. Introduced show_pwm, store_pwm, nct7802_pwm_attrs, nct7802_pwm_group. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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fcdc5739dc
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@ -102,6 +102,36 @@ static ssize_t store_temp_type(struct device *dev,
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return err ? : count;
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return err ? : count;
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}
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}
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static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct nct7802_data *data = dev_get_drvdata(dev);
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unsigned int val;
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int ret;
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ret = regmap_read(data->regmap, attr->index, &val);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct nct7802_data *data = dev_get_drvdata(dev);
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int err;
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u8 val;
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err = kstrtou8(buf, 0, &val);
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if (err < 0)
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return err;
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err = regmap_write(data->regmap, attr->index, val);
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return err ? : count;
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}
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static int nct7802_read_temp(struct nct7802_data *data,
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static int nct7802_read_temp(struct nct7802_data *data,
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u8 reg_temp, u8 reg_temp_low, int *temp)
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u8 reg_temp, u8 reg_temp_low, int *temp)
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@ -735,6 +765,11 @@ static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2);
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static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
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static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
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0x5b, 2);
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0x5b, 2);
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/* 7.2.91... Fan Control Output Value */
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static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x60);
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static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x61);
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static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x62);
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static struct attribute *nct7802_fan_attrs[] = {
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static struct attribute *nct7802_fan_attrs[] = {
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&sensor_dev_attr_fan1_input.dev_attr.attr,
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&sensor_dev_attr_fan1_input.dev_attr.attr,
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&sensor_dev_attr_fan1_min.dev_attr.attr,
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&sensor_dev_attr_fan1_min.dev_attr.attr,
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@ -773,10 +808,22 @@ static struct attribute_group nct7802_fan_group = {
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.is_visible = nct7802_fan_is_visible,
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.is_visible = nct7802_fan_is_visible,
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};
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};
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static struct attribute *nct7802_pwm_attrs[] = {
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&sensor_dev_attr_pwm1.dev_attr.attr,
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&sensor_dev_attr_pwm2.dev_attr.attr,
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&sensor_dev_attr_pwm3.dev_attr.attr,
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NULL
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};
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static struct attribute_group nct7802_pwm_group = {
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.attrs = nct7802_pwm_attrs,
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};
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static const struct attribute_group *nct7802_groups[] = {
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static const struct attribute_group *nct7802_groups[] = {
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&nct7802_temp_group,
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&nct7802_temp_group,
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&nct7802_in_group,
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&nct7802_in_group,
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&nct7802_fan_group,
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&nct7802_fan_group,
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&nct7802_pwm_group,
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NULL
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NULL
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};
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};
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