video/exynos/exynos_pwm_bl.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * PWM BACKLIGHT driver for Board based on EXYNOS.
7  * Derived from linux/drivers/video/backlight/pwm_backlight.c
15 #include <asm/arch/gpio.h>
23 	int brightness = pwm->brightness;  in exynos_pwm_backlight_update_status()
24 	int max = pwm->max_brightness;  in exynos_pwm_backlight_update_status()
27 		pwm_config(pwm->pwm_id, 0, pwm->period);  in exynos_pwm_backlight_update_status()
28 		pwm_disable(pwm->pwm_id);  in exynos_pwm_backlight_update_status()
30 		pwm_config(pwm->pwm_id,  in exynos_pwm_backlight_update_status()
31 			brightness * pwm->period / max, pwm->period);  in exynos_pwm_backlight_update_status()
32 		pwm_enable(pwm->pwm_id);  in exynos_pwm_backlight_update_status()