On Mon, 21 Sep 2015, Boris Brezillon wrote:
> The PWM period will be set when calling pwm_config. Remove this useless
> call to pwm_set_period, which might mess up with the initial PWM state
> once we have added proper support for PWM init state retrieval.
>
> Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
> ---
> drivers/video/backlight/pwm_bl.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)
Acked-by: Lee Jones <lee.jo...@linaro.org>
> diff --git a/drivers/video/backlight/pwm_bl.c
> b/drivers/video/backlight/pwm_bl.c
> index ae498c1..71944f8 100644
> --- a/drivers/video/backlight/pwm_bl.c
> +++ b/drivers/video/backlight/pwm_bl.c
> @@ -293,12 +293,14 @@ static int pwm_backlight_probe(struct platform_device
> *pdev)
> * period, parsed from the DT, in the PWM device. For the non-DT case,
> * set the period from platform data if it has not already been set
> * via the PWM lookup table.
> + * FIXME: This assignment should be dropped as soon as all the boards
> + * have moved to the PWM lookup table approach. The same goes for the
> + * pb->period field which should be replaced by
> + * pwm_get_default_period() calls.
> */
> pb->period = pwm_get_default_period(pb->pwm);
> - if (!pb->period && (data->pwm_period_ns > 0)) {
> + if (!pb->period && (data->pwm_period_ns > 0))
> pb->period = data->pwm_period_ns;
> - pwm_set_period(pb->pwm, data->pwm_period_ns);
> - }
>
> pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale);
>
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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