diff options
| author | Mohan Pallaka <mpallaka@codeaurora.org> | 2013-05-10 15:34:44 +0530 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2016-08-05 08:27:46 -0700 |
| commit | 3274081bed1a84bab74d1b9462e91530cb910d94 (patch) | |
| tree | 464d7942c1b1ac20477c06747b92065cc0d1e3fe /drivers/input | |
| parent | 95c648643d88d524b042961beda59f76254f6d28 (diff) | |
input: ft5x06_ts: Add support for FB notifications
Add support for FB notifications to trigger suspend/resume
based on FB blank/unblank events.
Change-Id: I79abc586ad8c14a25afd56559c579a1415df9f0e
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/ft5x06_ts.c | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/drivers/input/touchscreen/ft5x06_ts.c b/drivers/input/touchscreen/ft5x06_ts.c index 79aadf4507b9..6cf3be21f042 100644 --- a/drivers/input/touchscreen/ft5x06_ts.c +++ b/drivers/input/touchscreen/ft5x06_ts.c @@ -28,7 +28,11 @@ #include <linux/regulator/consumer.h> #include <linux/input/ft5x06_ts.h> -#ifdef CONFIG_HAS_EARLYSUSPEND +#if defined(CONFIG_FB) +#include <linux/notifier.h> +#include <linux/fb.h> + +#elif defined(CONFIG_HAS_EARLYSUSPEND) #include <linux/earlysuspend.h> /* Early-suspend level */ #define FT5X06_SUSPEND_LEVEL 1 @@ -89,7 +93,9 @@ struct ft5x06_ts_data { const struct ft5x06_ts_platform_data *pdata; struct regulator *vdd; struct regulator *vcc_i2c; -#ifdef CONFIG_HAS_EARLYSUSPEND +#if defined(CONFIG_FB) + struct notifier_block fb_notif; +#elif defined(CONFIG_HAS_EARLYSUSPEND) struct early_suspend early_suspend; #endif }; @@ -376,7 +382,27 @@ static int ft5x06_ts_resume(struct device *dev) return 0; } -#ifdef CONFIG_HAS_EARLYSUSPEND +#if defined(CONFIG_FB) +static int fb_notifier_callback(struct notifier_block *self, + unsigned long event, void *data) +{ + struct fb_event *evdata = data; + int *blank; + struct ft5x06_ts_data *ft5x06_data = + container_of(self, struct ft5x06_ts_data, fb_notif); + + if (evdata && evdata->data && event == FB_EVENT_BLANK && + ft5x06_data && ft5x06_data->client) { + blank = evdata->data; + if (*blank == FB_BLANK_UNBLANK) + ft5x06_ts_resume(&ft5x06_data->client->dev); + else if (*blank == FB_BLANK_POWERDOWN) + ft5x06_ts_suspend(&ft5x06_data->client->dev); + } + + return 0; +} +#elif defined(CONFIG_HAS_EARLYSUSPEND) static void ft5x06_ts_early_suspend(struct early_suspend *handler) { struct ft5x06_ts_data *data = container_of(handler, @@ -397,7 +423,7 @@ static void ft5x06_ts_late_resume(struct early_suspend *handler) #endif static const struct dev_pm_ops ft5x06_ts_pm_ops = { -#ifndef CONFIG_HAS_EARLYSUSPEND +#if (!defined(CONFIG_FB) && !defined(CONFIG_HAS_EARLYSUSPEND)) .suspend = ft5x06_ts_suspend, .resume = ft5x06_ts_resume, #endif @@ -689,8 +715,15 @@ static int ft5x06_ts_probe(struct i2c_client *client, dev_err(&client->dev, "request irq failed\n"); goto free_reset_gpio; } +#if defined(CONFIG_FB) + data->fb_notif.notifier_call = fb_notifier_callback; -#ifdef CONFIG_HAS_EARLYSUSPEND + err = fb_register_client(&data->fb_notif); + + if (err) + dev_err(&client->dev, "Unable to register fb_notifier: %d\n", + err); +#elif defined(CONFIG_HAS_EARLYSUSPEND) data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + FT5X06_SUSPEND_LEVEL; data->early_suspend.suspend = ft5x06_ts_early_suspend; @@ -730,7 +763,10 @@ static int ft5x06_ts_remove(struct i2c_client *client) { struct ft5x06_ts_data *data = i2c_get_clientdata(client); -#ifdef CONFIG_HAS_EARLYSUSPEND +#if defined(CONFIG_FB) + if (fb_unregister_client(&data->fb_notif)) + dev_err(&client->dev, "Error occurred while unregistering fb_notifier.\n"); +#elif defined(CONFIG_HAS_EARLYSUSPEND) unregister_early_suspend(&data->early_suspend); #endif free_irq(client->irq, data); |