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Commit 86797e82 authored by Mohan Pallaka's avatar Mohan Pallaka Committed by Shantanu Jain
Browse files

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: default avatarMohan Pallaka <mpallaka@codeaurora.org>
Signed-off-by: default avatarShantanu Jain <shjain@codeaurora.org>
parent 83310a9a

drivers/input/touchscreen/ft5x06_ts.c

+42 −6
Original line number Diff line number Diff line
@@ -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);