Am 04.02.2015 um 23:27 schrieb Alex Deucher:
> 0-255 seems to be the preferred range for the pwm interface.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Yeah, using 100 on a 8bit pwm timer sounds rather obviously wrong.
Patch is Reviewed-by: Christian König <christian.koenig at 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);
> }
>
