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Commit 8b724a99 authored by Shantanu Jain's avatar Shantanu Jain Committed by Gerrit - the friendly Code Review server
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input: it7258_ts_i2c: add debugfs support for suspend/resume 



Add debugfs support for suspend and resume test for ITE
tech touchscreen driver.

Change-Id: I5a3d55c7c8e4b8f594fd7924c61ac1e5b5ad1965
Signed-off-by: default avatarShantanu Jain <shjain@codeaurora.org>
parent 59a666fb

drivers/input/touchscreen/it7258_ts_i2c.c

+54 −0
Original line number Diff line number Diff line
@@ -25,11 +25,13 @@ 
#include <linux/regulator/consumer.h>

#include <linux/of_gpio.h>

#include <linux/fb.h>

#include <linux/debugfs.h>



#define MAX_BUFFER_SIZE			144

#define DEVICE_NAME			"IT7260"

#define SCREEN_X_RESOLUTION		320

#define SCREEN_Y_RESOLUTION		320

#define DEBUGFS_DIR_NAME		"ts_debug"



/* all commands writes go to this idx */

#define BUF_COMMAND			0x20
@@ -157,6 +159,7 @@ struct IT7260_ts_data { 
#ifdef CONFIG_FB

	struct notifier_block fb_notif;

#endif

	struct dentry *dir;

};



static int8_t fwUploadResult;
@@ -170,6 +173,26 @@ static struct IT7260_ts_data *gl_ts; 
#define LOGE(...)	pr_err(DEVICE_NAME ": " __VA_ARGS__)

#define LOGI(...)	printk(DEVICE_NAME ": " __VA_ARGS__)



static int IT7260_debug_suspend_set(void *_data, u64 val)

{

	if (val)

		IT7260_ts_suspend(&gl_ts->client->dev);

	else

		IT7260_ts_resume(&gl_ts->client->dev);



	return 0;

}



static int IT7260_debug_suspend_get(void *_data, u64 *val)

{

	*val = isDeviceSuspend;



	return 0;

}



DEFINE_SIMPLE_ATTRIBUTE(debug_suspend_fops, IT7260_debug_suspend_get,

				IT7260_debug_suspend_set, "%lld\n");



/* internal use func - does not make sure chip is ready before read */

static bool i2cReadNoReadyCheck(uint8_t bufferIndex, uint8_t *dataBuffer,

							uint16_t dataLength)
@@ -814,6 +837,7 @@ static int IT7260_ts_probe(struct i2c_client *client, 
	uint8_t rsp[2];

	int ret = -1;

	int rc;

	struct dentry *temp;



	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {

		LOGE("need I2C_FUNC_I2C\n");
@@ -989,8 +1013,36 @@ static int IT7260_ts_probe(struct i2c_client *client, 
	i2cReadNoReadyCheck(BUF_RESPONSE, rsp, sizeof(rsp));

	mdelay(10);



	gl_ts->dir = debugfs_create_dir(DEBUGFS_DIR_NAME, NULL);

	if (gl_ts->dir == NULL || IS_ERR(gl_ts->dir)) {

		dev_err(&client->dev,

			"%s: Failed to create debugfs directory, rc = %ld\n",

			__func__, PTR_ERR(gl_ts->dir));

		ret = PTR_ERR(gl_ts->dir);

		goto err_create_debugfs_dir;

	}



	temp = debugfs_create_file("suspend", S_IRUSR | S_IWUSR, gl_ts->dir,

					gl_ts, &debug_suspend_fops);

	if (temp == NULL || IS_ERR(temp)) {

		dev_err(&client->dev,

			"%s: Failed to create suspend debugfs file, rc = %ld\n",

			__func__, PTR_ERR(temp));

		ret = PTR_ERR(temp);

		goto err_create_debugfs_file;

	}



	return 0;



err_create_debugfs_file:

	debugfs_remove_recursive(gl_ts->dir);

err_create_debugfs_dir:

#if defined(CONFIG_FB)

	if (fb_unregister_client(&gl_ts->fb_notif))

		dev_err(&client->dev, "Error occurred while unregistering fb_notifier.\n");

#endif

	sysfs_remove_group(&(client->dev.kobj), &it7260_attr_group);



err_sysfs_grp_create_2:

	free_irq(client->irq, gl_ts);
@@ -1014,10 +1066,12 @@ err_out: 


static int IT7260_ts_remove(struct i2c_client *client)

{

	debugfs_remove_recursive(gl_ts->dir);

#if defined(CONFIG_FB)

	if (fb_unregister_client(&gl_ts->fb_notif))

		dev_err(&client->dev, "Error occurred while unregistering fb_notifier.\n");

#endif

	sysfs_remove_group(&(client->dev.kobj), &it7260_attr_group);

	devicePresent = false;

	return 0;

}