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Commit 16fc3352 authored by Alexandre Belloni's avatar Alexandre Belloni Committed by Thierry Reding
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pwm-backlight: retrieve configured PWM period 



The PWM core is now able to initialize the PWM period from a lookup
table defined by board files. Use it if available and fallback to the
value supplied in pwm_period_ns.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 81225bed

drivers/video/backlight/pwm_bl.c

+6 −3
Original line number Diff line number Diff line
@@ -296,12 +296,15 @@ static int pwm_backlight_probe(struct platform_device *pdev) 
	/*

	 * The DT case will set the pwm_period_ns field to 0 and store the

	 * period, parsed from the DT, in the PWM device. For the non-DT case,

	 * set the period from platform data.

	 * set the period from platform data if it has not already been set

	 * via the PWM lookup table.

	 */

	if (data->pwm_period_ns > 0)

	pb->period = pwm_get_period(pb->pwm);

	if (!pb->period && (data->pwm_period_ns > 0)) {

		pb->period = data->pwm_period_ns;

		pwm_set_period(pb->pwm, data->pwm_period_ns);

	}



	pb->period = pwm_get_period(pb->pwm);

	pb->lth_brightness = data->lth_brightness * (pb->period / pb->scale);



	memset(&props, 0, sizeof(struct backlight_properties));