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path: root/drivers/hwmon
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-rw-r--r--drivers/hwmon/f75375s.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index 9ab034a1b4c1..6aa5a9fad879 100644
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -279,6 +279,21 @@ static bool duty_mode_enabled(u8 pwm_enable)
}
}
+static bool auto_mode_enabled(u8 pwm_enable)
+{
+ switch (pwm_enable) {
+ case 0: /* Manual, duty mode (full speed) */
+ case 1: /* Manual, duty mode */
+ case 3: /* Manual, speed mode */
+ return false;
+ case 2: /* Auto, speed mode */
+ case 4: /* Auto, duty mode */
+ return true;
+ default:
+ BUG();
+ }
+}
+
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
@@ -312,6 +327,11 @@ static ssize_t set_fan_target(struct device *dev, struct device_attribute *attr,
if (err < 0)
return err;
+ if (auto_mode_enabled(data->pwm_enable[nr]))
+ return -EINVAL;
+ if (data->kind == f75387 && duty_mode_enabled(data->pwm_enable[nr]))
+ return -EINVAL;
+
mutex_lock(&data->update_lock);
data->fan_target[nr] = rpm_to_reg(val);
f75375_write16(client, F75375_REG_FAN_EXP(nr), data->fan_target[nr]);
@@ -332,6 +352,10 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
if (err < 0)
return err;
+ if (auto_mode_enabled(data->pwm_enable[nr]) ||
+ !duty_mode_enabled(data->pwm_enable[nr]))
+ return -EINVAL;
+
mutex_lock(&data->update_lock);
data->pwm[nr] = SENSORS_LIMIT(val, 0, 255);
f75375_write_pwm(client, nr);
@@ -793,6 +817,9 @@ static void f75375_init(struct i2c_client *client, struct f75375_data *data,
set_pwm_enable_direct(client, 0, f75375s_pdata->pwm_enable[0]);
set_pwm_enable_direct(client, 1, f75375s_pdata->pwm_enable[1]);
for (nr = 0; nr < 2; nr++) {
+ if (auto_mode_enabled(f75375s_pdata->pwm_enable[nr]) ||
+ !duty_mode_enabled(f75375s_pdata->pwm_enable[nr]))
+ continue;
data->pwm[nr] = SENSORS_LIMIT(f75375s_pdata->pwm[nr], 0, 255);
f75375_write_pwm(client, nr);
}