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modify early_suspend of wm831x backlight

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This commit is contained in:
luowei
2011-03-29 14:53:40 +08:00
parent 6653dd0bba
commit 7ba4f2f544
1 changed files with 49 additions and 45 deletions
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94
drivers/video/backlight/wm831x_bl.c
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@@ -28,18 +28,19 @@ struct wm831x_backlight_data {
struct wm831x *wm831x;
int isink_reg;
int current_brightness;
#ifdef CONFIG_HAS_EARLYSUSPEND
struct early_suspend early_suspend;
struct delayed_work work;
int suspend_flag;
#endif
};
#define TS_POLL_DELAY (10000*1000*1000)
int suspend_flag = 0;
int wm831x_bright = 0;
int max_tp = 0;
#ifdef CONFIG_HAS_EARLYSUSPEND
static struct backlight_device *wm831x_bl;
static struct timer_list wm831x_timer;
static struct wm831x_backlight_data *wm831x_data;
static struct wm831x *gpwm831x;
static struct backlight_device *gwm831x_bl;
static struct wm831x_backlight_data *gwm831x_data;
#endif
struct hrtimer wm831x_bl_timer;
static int wm831x_backlight_set(struct backlight_device *bl, int brightness)
{
struct wm831x_backlight_data *data = bl_get_data(bl);
@@ -115,8 +116,10 @@ err:
static int wm831x_backlight_update_status(struct backlight_device *bl)
{
int brightness = bl->props.brightness;
if (suspend_flag == 1)
if(gwm831x_data->suspend_flag == 1)
brightness = 0;
if (bl->props.power != FB_BLANK_UNBLANK)
brightness = 0;
@@ -125,7 +128,9 @@ static int wm831x_backlight_update_status(struct backlight_device *bl)
if (bl->props.state & BL_CORE_SUSPENDED)
brightness = 0;
printk("backlight brightness=%d\n", brightness);
return wm831x_backlight_set(bl, brightness);
}
@@ -135,39 +140,39 @@ static int wm831x_backlight_get_brightness(struct backlight_device *bl)
return data->current_brightness;
}
static const struct backlight_ops wm831x_backlight_ops = {
static struct backlight_ops wm831x_backlight_ops = {
.options = BL_CORE_SUSPENDRESUME,
.update_status = wm831x_backlight_update_status,
.get_brightness = wm831x_backlight_get_brightness,
};
static void wm831x_delaybacklight_timer(unsigned long data)
{
wm831x_backlight_update_status(wm831x_bl);
}
#ifdef CONFIG_HAS_EARLYSUSPEND
static void wm831x_bl_work(struct work_struct *work)
{
//struct wm831x_backlight_data *wm831x_data = container_of(work, struct wm831x_backlight_data,
//work.work);
backlight_update_status(gwm831x_bl);
}
static void wm831x_bl_suspend(struct early_suspend *h)
{
suspend_flag = 1;
wm831x_delaybacklight_timer(NULL);
struct wm831x_backlight_data *wm831x_data;
wm831x_data = container_of(h, struct wm831x_backlight_data, early_suspend);
wm831x_data->suspend_flag = 1;
schedule_delayed_work(&wm831x_data->work, msecs_to_jiffies(100));
}
static void wm831x_bl_resume(struct early_suspend *h)
{
// wm831x_timer.expires = jiffies + 30;
// add_timer(&wm831x_timer);
suspend_flag = 0;
wm831x_delaybacklight_timer(NULL);
struct wm831x_backlight_data *wm831x_data;
wm831x_data = container_of(h, struct wm831x_backlight_data, early_suspend);
wm831x_data->suspend_flag = 0;
schedule_delayed_work(&wm831x_data->work, msecs_to_jiffies(100));
}
static struct early_suspend bl_early_suspend;
#endif
static enum hrtimer_restart wm831x_bl_timer_fuction(struct hrtimer *handle)
{
backlight_update_status(wm831x_bl);
return HRTIMER_NORESTART;
}
static int wm831x_backlight_probe(struct platform_device *pdev)
{
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
@@ -177,7 +182,6 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
struct backlight_device *bl;
struct backlight_properties props;
int ret, i, max_isel, isink_reg, dcdc_cfg;
/* We need platform data */
if (pdev->dev.parent->platform_data) {
@@ -239,40 +243,40 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
if (data == NULL)
return -ENOMEM;
data->wm831x = gpwm831x = wm831x;
data->wm831x = wm831x;
data->current_brightness = 0;
data->isink_reg = isink_reg;
props.max_brightness = max_isel;
//bl = backlight_device_register("wm831x", &pdev->dev, data,
// &wm831x_backlight_ops, &props);
wm831x_bl = bl = backlight_device_register("wm831x", &pdev->dev, data,
bl = backlight_device_register("wm831x", &pdev->dev, data,
&wm831x_backlight_ops);
if (IS_ERR(bl)) {
dev_err(&pdev->dev, "failed to register backlight\n");
kfree(data);
return PTR_ERR(bl);
}
setup_timer(&wm831x_timer, wm831x_delaybacklight_timer, NULL);
bl->props.brightness = BL_SET;
bl->props.max_brightness= BL_SET;
wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0);
platform_set_drvdata(pdev, bl);
#ifdef CONFIG_HAS_EARLYSUSPEND
bl_early_suspend.suspend = wm831x_bl_suspend;
bl_early_suspend.resume = wm831x_bl_resume;
bl_early_suspend.level = ~0x0;
register_early_suspend(&bl_early_suspend);
#ifdef CONFIG_HAS_EARLYSUSPEND
data->early_suspend.level = ~0x0;
data->early_suspend.suspend = wm831x_bl_suspend;
data->early_suspend.resume = wm831x_bl_resume;
register_early_suspend(&data->early_suspend);
INIT_DELAYED_WORK(&data->work, wm831x_bl_work);
gwm831x_bl = bl;
gwm831x_data = data;
#endif
hrtimer_init(&wm831x_bl_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
wm831x_bl_timer.function = wm831x_bl_timer_fuction;
hrtimer_start(&wm831x_bl_timer, ktime_set(0, TS_POLL_DELAY),
HRTIMER_MODE_REL);
/* Disable the DCDC if it was started so we can bootstrap */
wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0);
//backlight_update_status(bl);
schedule_delayed_work(&data->work, msecs_to_jiffies(100));
return 0;
}
@@ -284,7 +288,7 @@ static int wm831x_backlight_remove(struct platform_device *pdev)
backlight_device_unregister(bl);
#ifdef CONFIG_HAS_EARLYSUSPEND
unregister_early_suspend(&bl_early_suspend);
unregister_early_suspend(&data->early_suspend);
#endif
kfree(data);
return 0;