lkml.org 
[lkml]   [2015]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 04/12] backlight: pwm_bl: remove useless call to pwm_set_period
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.brezillon@free-electrons.com>
> ---
> drivers/video/backlight/pwm_bl.c | 8 +++++---
> 1 file changed, 5 insertions(+), 3 deletions(-)

Acked-by: Lee Jones <lee.jones@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
Follow Linaro: Facebook | Twitter | Blog


\
 
 \ /
  Last update: 2015-09-23 01:01    [W:0.152 / U:6.396 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site