drm/radeon: use 0-255 rather than 0-100 for pwm fan range

0-255 seems to be the preferred range for the pwm interface.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 91e1bd246cad..9f758d39420d 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -585,7 +585,7 @@ static ssize_t radeon_hwmon_set_pwm1_enable(struct device *dev,
         if (err)
                 return err;
 
-        switch(value) {
+        switch (value) {
         case 1: /* manual, percent-based */
                 rdev->asic->dpm.fan_ctrl_set_mode(rdev, FDO_PWM_MODE_STATIC);
                 break;
@@ -608,7 +608,7 @@ static ssize_t radeon_hwmon_get_pwm1_max(struct device *dev,
                                          struct device_attribute *attr,
                                          char *buf)
 {
-        return sprintf(buf, "%i\n", 100); /* pwm uses percent-based fan-control */
+        return sprintf(buf, "%i\n", 255);
 }
 
 static ssize_t radeon_hwmon_set_pwm1(struct device *dev,
@@ -623,6 +623,8 @@ static ssize_t radeon_hwmon_set_pwm1(struct device *dev,
         if (err)
                 return err;
 
+        value = (value * 100) / 255;
+
         err = rdev->asic->dpm.set_fan_speed_percent(rdev, value);
         if (err)
                 return err;
@@ -642,6 +644,8 @@ static ssize_t radeon_hwmon_get_pwm1(struct device *dev,
         if (err)
                 return err;
 
+        speed = (speed * 255) / 100;
+
         return sprintf(buf, "%i\n", speed);
 }