Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit cf29d5ea authored by Shantanu Jain's avatar Shantanu Jain Committed by Abinaya P
Browse files

input: touchscreen: Add debugfs support for suspend/resume. 



Add debugfs entry for suspend/resume that allow suspending/
resuming of Goodix CTP driver from userspace. Also change
the return type of goodix_ts_resume and goodix_ts_suspend
functions and set the status of gtp_is_suspended in the last
of above functions.

Change-Id: Ic2b1b2562b63ccecdf15bdc64ad7e45996d196d3
Signed-off-by: default avatarShantanu Jain <shjain@codeaurora.org>
parent 740bb381

drivers/input/touchscreen/gt9xx/gt9xx.c

+78 −5
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ 
#include <linux/irq.h>

#include <linux/module.h>

#include <linux/input/mt.h>

#include <linux/debugfs.h>



#define GOODIX_DEV_NAME	"Goodix-CTP"

#define CFG_MAX_TOUCH_POINTS	5
@@ -84,6 +85,8 @@ static int goodix_power_on(struct goodix_ts_data *ts); 
#if defined(CONFIG_FB)

static int fb_notifier_callback(struct notifier_block *self,

				unsigned long event, void *data);

static int goodix_ts_suspend(struct device *dev);

static int goodix_ts_resume(struct device *dev);

#elif defined(CONFIG_HAS_EARLYSUSPEND)

static void goodix_ts_early_suspend(struct early_suspend *h);

static void goodix_ts_late_resume(struct early_suspend *h);
@@ -110,6 +113,9 @@ static u8 chip_gt9xxs; /* true if ic is gt9xxs, like gt915s */ 
u8 grp_cfg_version;

struct i2c_client  *i2c_connect_client;



#define GTP_DEBUGFS_DIR			"ts_debug"

#define GTP_DEBUGFS_FILE_SUSPEND	"suspend"



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

Function:

	Read data from the i2c slave device.
@@ -1556,6 +1562,56 @@ static const struct attribute_group gtp_attr_grp = { 
	.attrs = gtp_attrs,

};



static int gtp_debug_suspend_set(void *_data, u64 val)

{

	struct goodix_ts_data *ts = _data;



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

	if (val)

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

	else

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

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



	return 0;

}



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

{

	struct goodix_ts_data *ts = _data;



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

	*val = ts->gtp_is_suspend;

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



	return 0;

}



DEFINE_SIMPLE_ATTRIBUTE(debug_suspend_fops, gtp_debug_suspend_get,

			gtp_debug_suspend_set, "%lld\n");



static int gtp_debugfs_init(struct goodix_ts_data *data)

{

	data->debug_base = debugfs_create_dir(GTP_DEBUGFS_DIR, NULL);



	if (IS_ERR_OR_NULL(data->debug_base)) {

		pr_err("Failed to create debugfs dir\n");

			return -EINVAL;

	}



	if ((IS_ERR_OR_NULL(debugfs_create_file(GTP_DEBUGFS_FILE_SUSPEND,

					S_IWUSR | S_IWGRP | S_IRUSR | S_IRGRP,

					data->debug_base,

					data,

					&debug_suspend_fops)))) {

		pr_err("Failed to create suspend file\n");

		debugfs_remove_recursive(data->debug_base);

		return -EINVAL;

	}



	return 0;

}



static int goodix_ts_get_dt_coords(struct device *dev, char *name,

				struct goodix_ts_platform_data *pdata)

{
@@ -1860,6 +1916,10 @@ static int goodix_ts_probe(struct i2c_client *client, 
		goto exit_free_irq;

	}



	ret = gtp_debugfs_init(ts);

	if (ret != 0)

		goto exit_remove_sysfs;



	init_done = true;

	return 0;

exit_free_irq:
@@ -1884,6 +1944,8 @@ exit_free_irq: 
		input_free_device(ts->input_dev);

		ts->input_dev = NULL;

	}

exit_remove_sysfs:

	sysfs_remove_group(&ts->input_dev->dev.kobj, &gtp_attr_grp);

exit_free_inputdev:

	kfree(ts->config_data);

exit_power_off:
@@ -1958,6 +2020,7 @@ static int goodix_ts_remove(struct i2c_client *client) 
		goodix_power_deinit(ts);

		i2c_set_clientdata(client, NULL);

	}

	debugfs_remove_recursive(ts->debug_base);



	return 0;

}
@@ -1976,9 +2039,13 @@ static int goodix_ts_suspend(struct device *dev) 
	struct goodix_ts_data *ts = dev_get_drvdata(dev);

	int ret = 0, i;



	if (ts->gtp_is_suspend) {

		dev_dbg(&ts->client->dev, "Already in suspend state\n");

		return 0;

	}



	mutex_lock(&ts->lock);

#if GTP_ESD_PROTECT

	ts->gtp_is_suspend = 1;

	gtp_esd_switch(ts->client, SWITCH_OFF);

#endif
@@ -1998,12 +2065,13 @@ static int goodix_ts_suspend(struct device *dev) 
	ret = gtp_enter_sleep(ts);

#endif

	if (ret <= 0)

		dev_err(&ts->client->dev, "GTP early suspend failed.\n");

		dev_err(&ts->client->dev, "GTP early suspend failed\n");

	/* to avoid waking up while not sleeping,

	 * delay 48 + 10ms to ensure reliability

	 */

	msleep(58);

	mutex_unlock(&ts->lock);

	ts->gtp_is_suspend = 1;



	return ret;

}
@@ -2021,6 +2089,11 @@ static int goodix_ts_resume(struct device *dev) 
	struct goodix_ts_data *ts = dev_get_drvdata(dev);

	int ret = 0;



	if (!ts->gtp_is_suspend) {

		dev_dbg(&ts->client->dev, "Already in awake state\n");

		return 0;

	}



	mutex_lock(&ts->lock);

	ret = gtp_wakeup_sleep(ts);
@@ -2029,7 +2102,7 @@ static int goodix_ts_resume(struct device *dev) 
#endif



	if (ret <= 0)

		dev_err(&ts->client->dev, "GTP resume failed.\n");

		dev_err(&ts->client->dev, "GTP resume failed\n");



	if (ts->use_irq)

		gtp_irq_enable(ts);
@@ -2038,10 +2111,10 @@ static int goodix_ts_resume(struct device *dev) 
			ktime_set(1, 0), HRTIMER_MODE_REL);



#if GTP_ESD_PROTECT

	ts->gtp_is_suspend = 0;

	gtp_esd_switch(ts->client, SWITCH_ON);

#endif

	mutex_unlock(&ts->lock);

	ts->gtp_is_suspend = 0;



	return ret;

}

drivers/input/touchscreen/gt9xx/gt9xx.h

+1 −0
Original line number Diff line number Diff line
@@ -96,6 +96,7 @@ struct goodix_ts_data { 
#elif defined(CONFIG_HAS_EARLYSUSPEND)

	struct early_suspend early_suspend;

#endif

	struct dentry *debug_base;

};



extern u16 show_len;