diff options
author | Simon Glass <sjg@chromium.org> | 2016-02-22 04:08:38 (GMT) |
---|---|---|
committer | Minkyu Kang <mk7.kang@samsung.com> | 2016-05-25 04:25:17 (GMT) |
commit | 08a7aa1e5be7059d680fedf0a885655a895f638e (patch) | |
tree | 3b1733f38c22bcce74ae9de3e816841dd48707e2 /drivers/video/exynos/exynos_pwm_bl.c | |
parent | 6c15a2a996214574e8145bff69d110a302edf277 (diff) | |
download | u-boot-08a7aa1e5be7059d680fedf0a885655a895f638e.tar.xz |
exynos: video: Move driver files into their own directory
Move all the exynos video drivers into one place for ease of maintenance.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'drivers/video/exynos/exynos_pwm_bl.c')
-rw-r--r-- | drivers/video/exynos/exynos_pwm_bl.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/video/exynos/exynos_pwm_bl.c b/drivers/video/exynos/exynos_pwm_bl.c new file mode 100644 index 0000000..a6890da --- /dev/null +++ b/drivers/video/exynos/exynos_pwm_bl.c @@ -0,0 +1,45 @@ +/* + * PWM BACKLIGHT driver for Board based on EXYNOS. + * + * Author: Donghwa Lee <dh09.lee@samsung.com> + * + * Derived from linux/drivers/video/backlight/pwm_backlight.c + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <pwm.h> +#include <linux/types.h> +#include <asm/io.h> +#include <asm/arch/cpu.h> +#include <asm/arch/gpio.h> +#include <asm/arch/pwm.h> +#include <asm/arch/pwm_backlight.h> + +static struct pwm_backlight_data *pwm; + +static int exynos_pwm_backlight_update_status(void) +{ + int brightness = pwm->brightness; + int max = pwm->max_brightness; + + if (brightness == 0) { + pwm_config(pwm->pwm_id, 0, pwm->period); + pwm_disable(pwm->pwm_id); + } else { + pwm_config(pwm->pwm_id, + brightness * pwm->period / max, pwm->period); + pwm_enable(pwm->pwm_id); + } + return 0; +} + +int exynos_pwm_backlight_init(struct pwm_backlight_data *pd) +{ + pwm = pd; + + exynos_pwm_backlight_update_status(); + + return 0; +} |