video: support exynos pwm backlight driver

This patch support exynos pwm backlight driver. It can control backlight
power and brightness by using pwm.

Signed-off-by: Donghwa Lee <dh09.lee@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-exynos/pwm_backlight.h b/arch/arm/include/asm/arch-exynos/pwm_backlight.h
new file mode 100644
index 0000000000..368ffc5cd7
--- /dev/null
+++ b/arch/arm/include/asm/arch-exynos/pwm_backlight.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * Author: Donghwa Lee <dh09.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _PWM_BACKLIGHT_H_
+#define _PWM_BACKLIGHT_H_
+
+struct pwm_backlight_data {
+	int pwm_id;
+	int period;
+	int max_brightness;
+	int brightness;
+};
+
+extern int exynos_pwm_backlight_init(struct pwm_backlight_data *pd);
+
+#endif /* _PWM_BACKLIGHT_H_ */