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Commit ec57d6be authored by Sarada Prasanna Garnayak's avatar Sarada Prasanna Garnayak Committed by Stephen Boyd
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input: cyttsp-i2c-qc: Add debugfs support for suspend/resume. 



Debugfs entry for touch device suspend/resume test.

Change-Id: I2d8e40059671d58bd4cfb6b74f6ba253366cb3c5
Signed-off-by: default avatarSarada Prasanna Garnayak <c_sgarna@codeaurora.org>
parent 77a88c15

drivers/input/touchscreen/cyttsp-i2c-qc.c

+54 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include <linux/pm_runtime.h>

#include <linux/firmware.h>

#include <linux/mutex.h>

#include <linux/debugfs.h>

#include <linux/regulator/consumer.h>

#ifdef CONFIG_HAS_EARLYSUSPEND

#include <linux/earlysuspend.h>
@@ -76,6 +77,7 @@ struct cyttsp { 
	bool cyttsp_fwloader_mode;

	bool is_suspended;

	struct regulator **vdd;

	struct dentry *dir;

	char fw_fname[FW_FNAME_LEN];

#ifdef CONFIG_HAS_EARLYSUSPEND

	struct early_suspend early_suspend;
@@ -92,6 +94,7 @@ static void cyttsp_early_suspend(struct early_suspend *handler); 
static void cyttsp_late_resume(struct early_suspend *handler);

#endif /* CONFIG_HAS_EARLYSUSPEND */



#define CYTTSP_DEBUG_DIR_NAME	"ts_debug"



/* ****************************************************************************

 * Prototypes for static functions
@@ -914,6 +917,36 @@ static ssize_t cyttsp_fw_name_store(struct device *dev, 
static DEVICE_ATTR(cyttsp_fw_name, 0664, cyttsp_fw_name_show,

					cyttsp_fw_name_store);



static int cyttsp_debug_suspend_set(void *_data, u64 val)

{

	struct cyttsp *ts = _data;



	mutex_lock(&ts->input->mutex);



	if (val)

		cyttsp_suspend(&ts->client->dev);

	else

		cyttsp_resume(&ts->client->dev);



	mutex_unlock(&ts->input->mutex);



	return 0;

}



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

{

	struct cyttsp *ts = _data;



	mutex_lock(&ts->input->mutex);

	*val = ts->is_suspended;

	mutex_unlock(&ts->input->mutex);



	return 0;

}



DEFINE_SIMPLE_ATTRIBUTE(debug_suspend_fops, cyttsp_debug_suspend_get,

			cyttsp_debug_suspend_set, "%lld\n");



static void cyttsp_xy_handler(struct cyttsp *ts)

{

	u8 id, tilt, rev_x, rev_y;
@@ -2447,6 +2480,7 @@ error_vdd: 
static int cyttsp_initialize(struct i2c_client *client, struct cyttsp *ts)

{

	struct input_dev *input_device;

	struct dentry *dir, *temp;

	int error = 0;

	int retval = CY_OK;

	u8 id;
@@ -2693,10 +2727,29 @@ static int cyttsp_initialize(struct i2c_client *client, struct cyttsp *ts) 
		goto error_rm_dev_file_fupdate_fw;

	}



	dir = debugfs_create_dir(CYTTSP_DEBUG_DIR_NAME, NULL);

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

		pr_err("debugfs_create_dir failed: rc=%ld\n", PTR_ERR(dir));

		error = PTR_ERR(dir);

		goto error_rm_dev_file_fw_name;

	}



	temp = debugfs_create_file("suspend", S_IRUSR | S_IWUSR, dir, ts,

					&debug_suspend_fops);

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

		pr_err("debugfs_create_file failed: rc=%ld\n", PTR_ERR(temp));

		error = PTR_ERR(temp);

		goto error_rm_debug_dir;

	}



	cyttsp_info("%s: Successful registration\n", CY_I2C_NAME);



	goto success;



error_rm_debug_dir:

	debugfs_remove_recursive(ts->dir);

error_rm_dev_file_fw_name:

	device_remove_file(&client->dev, &dev_attr_cyttsp_fw_name);

error_rm_dev_file_fupdate_fw:

	device_remove_file(&client->dev, &dev_attr_cyttsp_force_update_fw);

error_rm_dev_file_update_fw:
@@ -3037,6 +3090,7 @@ static int cyttsp_remove(struct i2c_client *client) 
	device_remove_file(&client->dev, &dev_attr_cyttsp_update_fw);

	device_remove_file(&client->dev, &dev_attr_cyttsp_force_update_fw);

	device_remove_file(&client->dev, &dev_attr_cyttsp_fw_name);

	debugfs_remove_recursive(ts->dir);



	/* free up timer or irq */

	if (ts->client->irq == 0) {