mirror of
https://git.yoctoproject.org/meta-ti
synced 2026-07-21 11:26:59 +00:00
Koen Kooi
127 lines
3.7 KiB
Diff
127 lines
3.7 KiB
Diff
From cc8cb0d0731c7a0517653e65c754051a69f34c3e Mon Sep 17 00:00:00 2001
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From: Gregoire Gentil <gregoire@gentil.com>
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Date: Wed, 31 Mar 2010 11:14:04 +0200
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Subject: [PATCH 14/17] backlight: add PWM support
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---
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drivers/video/backlight/backlight.c | 81 +++++++++++++++++++++++++++++++++++
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include/linux/backlight.h | 3 +
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2 files changed, 84 insertions(+), 0 deletions(-)
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diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
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index 7898707..615f40f 100644
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--- a/drivers/video/backlight/backlight.c
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+++ b/drivers/video/backlight/backlight.c
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@@ -226,6 +226,84 @@ static void bl_device_release(struct device *dev)
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kfree(bd);
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}
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+static ssize_t backlight_show_boost(struct device *dev, struct device_attribute *attr, char *buf)
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+{
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+ struct backlight_device *bd = to_backlight_device(dev);
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+ return sprintf(buf, "%u\n", bd->props.boost);
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+}
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+
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+static ssize_t backlight_store_boost(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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+{
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+ unsigned long i;
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+ struct backlight_device *bd = to_backlight_device(dev);
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+
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+ if (strict_strtoul(buf, 10, &i))
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+ return -EINVAL;
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+
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+ mutex_lock(&bd->ops_lock);
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+ if (bd->ops)
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+ {
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+ if (i)
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+ bd->props.boost = 1;
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+ else
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+ bd->props.boost = 0;
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+ backlight_update_status(bd);
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+ }
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+ mutex_unlock(&bd->ops_lock);
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+
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+ return count;
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+}
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+
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+static ssize_t backlight_show_pwm_fq(struct device *dev, struct device_attribute *attr, char *buf)
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+{
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+ struct backlight_device *bd = to_backlight_device(dev);
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+ return sprintf(buf, "%u\n", bd->props.pwm_fq);
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+}
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+
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+static ssize_t backlight_store_pwm_fq(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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+{
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+ unsigned long i;
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+ struct backlight_device *bd = to_backlight_device(dev);
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+
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+ if (strict_strtoul(buf, 10, &i))
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+ return -EINVAL;
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+
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+ mutex_lock(&bd->ops_lock);
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+ if (bd->ops)
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+ {
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+ bd->props.pwm_fq = i;
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+ backlight_update_status(bd);
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+ }
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+ mutex_unlock(&bd->ops_lock);
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+
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+ return count;
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+}
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+
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+static ssize_t backlight_show_min_duty(struct device *dev, struct device_attribute *attr, char *buf)
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+{
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+ struct backlight_device *bd = to_backlight_device(dev);
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+ return sprintf(buf, "%u\n", bd->props.min_duty);
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+}
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+
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+static ssize_t backlight_store_min_duty(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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+{
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+ unsigned long i;
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+ struct backlight_device *bd = to_backlight_device(dev);
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+
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+ if (strict_strtoul(buf, 10, &i))
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+ return -EINVAL;
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+
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+ mutex_lock(&bd->ops_lock);
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+ if (bd->ops)
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+ {
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+ bd->props.min_duty = i;
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+ backlight_update_status(bd);
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+ }
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+ mutex_unlock(&bd->ops_lock);
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+
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+ return count;
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+}
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+
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static struct device_attribute bl_device_attributes[] = {
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__ATTR(bl_power, 0644, backlight_show_power, backlight_store_power),
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__ATTR(brightness, 0666, backlight_show_brightness,
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@@ -233,6 +311,9 @@ static struct device_attribute bl_device_attributes[] = {
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__ATTR(actual_brightness, 0444, backlight_show_actual_brightness,
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NULL),
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__ATTR(max_brightness, 0444, backlight_show_max_brightness, NULL),
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+ __ATTR(boost, 0666, backlight_show_boost, backlight_store_boost),
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+ __ATTR(pwm_fq, 0666, backlight_show_pwm_fq, backlight_store_pwm_fq),
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+ __ATTR(min_duty, 0666, backlight_show_min_duty, backlight_store_min_duty),
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__ATTR_NULL,
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};
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diff --git a/include/linux/backlight.h b/include/linux/backlight.h
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index 0f5f578..f3a9b9f 100644
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--- a/include/linux/backlight.h
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+++ b/include/linux/backlight.h
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@@ -64,6 +64,9 @@ struct backlight_properties {
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int fb_blank;
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/* Flags used to signal drivers of state changes */
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/* Upper 4 bits are reserved for driver internal use */
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+ int boost;
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+ int pwm_fq;
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+ int min_duty;
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unsigned int state;
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#define BL_CORE_SUSPENDED (1 << 0) /* backlight is suspended */
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--
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1.6.6.1
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