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Commit 42ffbf9b authored by Shantanu Jain's avatar Shantanu Jain Committed by Sudhakar Manapati
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input: touchscreen: Add debufs entries for GTP controller 



Add debugfs entries for address and data to read the registers
of Goodix controller.

This patch is propagated from msm-3.10 kernel.
(commit: c28bcac4164ad57a39354692e981b68b141ff900
input: touchscreen: Add debufs entries for GTP controller)

Change-Id: I6543d523e39771615d0e1b684780141e108a2aa4
Signed-off-by: default avatarShantanu Jain <shjain@codeaurora.org>
parent 84ae3f83

drivers/input/touchscreen/gt9xx/gt9xx.c

+102 −2
Original line number Diff line number Diff line
@@ -121,6 +121,8 @@ struct i2c_client *i2c_connect_client; 


#define GTP_DEBUGFS_DIR			"ts_debug"

#define GTP_DEBUGFS_FILE_SUSPEND	"suspend"

#define GTP_DEBUGFS_FILE_DATA		"data"

#define GTP_DEBUGFS_FILE_ADDR		"addr"



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

Function:
@@ -1538,6 +1540,84 @@ static const struct attribute_group gtp_attr_grp = { 
	.attrs = gtp_attrs,

};



static int gtp_debug_addr_is_valid(u16 addr)

{

	if (addr < GTP_VALID_ADDR_START || addr > GTP_VALID_ADDR_END) {

		pr_err("GTP reg address is invalid: 0x%x\n", addr);

		return false;

	}



	return true;

}



static int gtp_debug_data_set(void *_data, u64 val)

{

	struct goodix_ts_data *ts = _data;



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

	if (gtp_debug_addr_is_valid(ts->addr))

		dev_err(&ts->client->dev,

			"Writing to GTP registers not supported.\n");

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



	return 0;

}



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

{

	struct goodix_ts_data *ts = _data;

	int ret;

	u8 buf[3] = {0};



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

	buf[0] = ts->addr >> 8;

	buf[1] = ts->addr & 0x00ff;



	if (gtp_debug_addr_is_valid(ts->addr)) {

		ret = gtp_i2c_read(ts->client, buf, 3);

		if (ret < 0)

			dev_err(&ts->client->dev,

				"GTP read register 0x%x failed (%d)\n",

				ts->addr, ret);

		else

			*val = buf[2];

	}

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



	return 0;

}



DEFINE_SIMPLE_ATTRIBUTE(debug_data_fops, gtp_debug_data_get,

				gtp_debug_data_set, "%llx\n");



static int gtp_debug_addr_set(void *_data, u64 val)

{

	struct goodix_ts_data *ts = _data;



	if (gtp_debug_addr_is_valid(val)) {

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

			ts->addr = val;

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

	}



	return 0;

}



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

{

	struct goodix_ts_data *ts = _data;



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

	if (gtp_debug_addr_is_valid(ts->addr))

		*val = ts->addr;

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



	return 0;

}



DEFINE_SIMPLE_ATTRIBUTE(debug_addr_fops, gtp_debug_addr_get,

				gtp_debug_addr_set, "%llx\n");



static int gtp_debug_suspend_set(void *_data, u64 val)

{

	struct goodix_ts_data *ts = _data;
@@ -1571,7 +1651,7 @@ 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");

		dev_err(&data->client->dev, "Failed to create debugfs dir.\n");

			return -EINVAL;

	}
@@ -1580,7 +1660,27 @@ static int gtp_debugfs_init(struct goodix_ts_data *data) 
					data->debug_base,

					data,

					&debug_suspend_fops)))) {

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

		dev_err(&data->client->dev, "Failed to create suspend file.\n");

		debugfs_remove_recursive(data->debug_base);

		return -EINVAL;

	}



	if ((IS_ERR_OR_NULL(debugfs_create_file(GTP_DEBUGFS_FILE_DATA,

					S_IWUSR | S_IWGRP | S_IRUSR | S_IRGRP,

					data->debug_base,

					data,

					&debug_data_fops)))) {

		dev_err(&data->client->dev, "Failed to create data file.\n");

		debugfs_remove_recursive(data->debug_base);

		return -EINVAL;

	}



	if ((IS_ERR_OR_NULL(debugfs_create_file(GTP_DEBUGFS_FILE_ADDR,

					S_IWUSR | S_IWGRP | S_IRUSR | S_IRGRP,

					data->debug_base,

					data,

					&debug_addr_fops)))) {

		dev_err(&data->client->dev, "Failed to create addr file.\n");

		debugfs_remove_recursive(data->debug_base);

		return -EINVAL;

	}

drivers/input/touchscreen/gt9xx/gt9xx.h

+4 −1
Original line number Diff line number Diff line 
/* drivers/input/touchscreen/gt9xx.h

 *

 * Copyright (c) 2013, The Linux Foundation. All rights reserved.

 * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.

 *

 * Linux Foundation chooses to take subject only to the GPLv2 license

 * terms, and distributes only under these terms.
@@ -78,6 +78,7 @@ struct goodix_ts_data { 
	s32 use_irq;

	u16 abs_x_max;

	u16 abs_y_max;

	u16 addr;

	u8  max_touch_num;

	u8  int_trigger_type;

	u8  green_wake_mode;
@@ -175,6 +176,8 @@ extern u16 total_len; 
/* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */

#define GTP_I2C_ADDRESS_HIGH	0x14

#define GTP_I2C_ADDRESS_LOW	0x5D

#define GTP_VALID_ADDR_START	0x8040

#define GTP_VALID_ADDR_END	0x8177



#define CFG_GROUP_LEN(p_cfg_grp) (sizeof(p_cfg_grp) / sizeof(p_cfg_grp[0]))