0-255 seems to be the preferred range for the pwm interface.
Signed-off-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/radeon/radeon_pm.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 91e1bd2..9f758d3 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); }