hwmon: (nct7802) Add pwm mode attributes

Introduced: show_pwm_mode, pwm1_mode, pwm2_mode, pwm2_mode

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c
index 457b0f2678a4..1c80aa48ee04 100644
--- a/drivers/hwmon/nct7802.c
+++ b/drivers/hwmon/nct7802.c
@@ -102,6 +102,24 @@ static ssize_t store_temp_type(struct device *dev,
         return err ? : count;
 }
 
+static ssize_t show_pwm_mode(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, &regval);
+        if (ret < 0)
+                return ret;
+
+        return sprintf(buf, "%u\n", !(regval & (1 << sattr->index)));
+}
+
 static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
                         char *buf)
 {
@@ -765,6 +783,11 @@ static SENSOR_DEVICE_ATTR_2(fan3_alarm, S_IRUGO, show_alarm, NULL, 0x1a, 2);
 static SENSOR_DEVICE_ATTR_2(fan3_beep, S_IRUGO | S_IWUSR, show_beep, store_beep,
                             0x5b, 2);
 
+/* 7.2.89 Fan Control Output Type */
+static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
+static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);
+static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
+
 /* 7.2.91... Fan Control Output Value */
 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);
@@ -809,8 +832,11 @@ static struct attribute_group nct7802_fan_group = {
 };
 
 static struct attribute *nct7802_pwm_attrs[] = {
+        &sensor_dev_attr_pwm1_mode.dev_attr.attr,
         &sensor_dev_attr_pwm1.dev_attr.attr,
+        &sensor_dev_attr_pwm2_mode.dev_attr.attr,
         &sensor_dev_attr_pwm2.dev_attr.attr,
+        &sensor_dev_attr_pwm3_mode.dev_attr.attr,
         &sensor_dev_attr_pwm3.dev_attr.attr,
         NULL
 };