hwmon: (f75375s) Fix register write order when setting fans to full speed

By hwmon sysfs interface convention, setting pwm_enable to zero sets a fan
to full speed.  In the f75375s driver, this need be done by enabling
manual fan control, plus duty mode for the F875387 chip, and then setting
the maximum duty cycle.  Fix a bug where the two necessary register writes
were swapped, effectively discarding the setting to full-speed.

Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
Cc: Riku Voipio <riku.voipio@iki.fi>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>

diff --git a/drivers/hwmon/f75375s.c b/drivers/hwmon/f75375s.c
index f609b5727ba9047f8ba0f4eb96bfdbae4183b7c4..6bab2001ef3b3d36c5549afe806d2dfab11809f6 100644 (file)
--- a/drivers/hwmon/f75375s.c
+++ b/drivers/hwmon/f75375s.c
@@ -340,8 +340,6 @@ static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
                        fanmode |= (1 << F75387_FAN_MANU_MODE(nr));
                        fanmode |= (1 << F75387_FAN_DUTY_MODE(nr));
                        data->pwm[nr] = 255;
-                       f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
-                                       data->pwm[nr]);
                        break;
                case 1: /* PWM */
                        fanmode  |= (1 << F75387_FAN_MANU_MODE(nr));
@@ -361,8 +359,6 @@ static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
                case 0: /* full speed */
                        fanmode  |= (3 << FAN_CTRL_MODE(nr));
                        data->pwm[nr] = 255;
-                       f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
-                                       data->pwm[nr]);
                        break;
                case 1: /* PWM */
                        fanmode  |= (3 << FAN_CTRL_MODE(nr));
@@ -377,6 +373,9 @@ static int set_pwm_enable_direct(struct i2c_client *client, int nr, int val)
 
        f75375_write8(client, F75375_REG_FAN_TIMER, fanmode);
        data->pwm_enable[nr] = val;
+       if (val == 0)
+               f75375_write8(client, F75375_REG_FAN_PWM_DUTY(nr),
+                               data->pwm[nr]);
        return 0;
 }