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Commit 3347fabc authored by Kiran Gunda's avatar Kiran Gunda
Browse files

regulator: fan53555: Add debugfs support 



Add debugfs support to read/write the fan53555 registers.

Change-Id: I4a5df7f9da7aa6d463d582ebc7d6570162040809
Signed-off-by: default avatarKiran Gunda <kgunda@codeaurora.org>
parent 5f2a3c1a

drivers/regulator/fan53555.c

+55 −1
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
 * published by the Free Software Foundation.

 *

 */

#include <linux/debugfs.h>

#include <linux/module.h>

#include <linux/param.h>

#include <linux/err.h>
@@ -105,8 +106,10 @@ struct fan53555_device_info { 
	unsigned int slew_rate;

	/* Sleep voltage cache */

	unsigned int sleep_vol_cache;

	unsigned int peek_poke_address;

	/* Disable suspend */

	bool disable_suspend;

	struct dentry *debug_root;

};



static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
@@ -503,6 +506,38 @@ static const struct of_device_id fan53555_dt_ids[] = { 
};

MODULE_DEVICE_TABLE(of, fan53555_dt_ids);



static int get_reg(void *data, u64 *val)

{

	struct fan53555_device_info *di = data;

	int rc;

	unsigned int temp = 0;



	rc = regmap_read(di->regmap, di->peek_poke_address, &temp);

	if (rc < 0)

		dev_err(di->dev, "Couldn't read reg %x rc = %d\n",

				di->peek_poke_address, rc);

	else

		*val = temp;



	return rc;

}



static int set_reg(void *data, u64 val)

{

	struct fan53555_device_info *di = data;

	int rc;

	unsigned int temp = 0;



	temp = (unsigned int) val;

	rc = regmap_write(di->regmap, di->peek_poke_address, temp);

	if (rc < 0)

		dev_err(di->dev, "Couldn't write 0x%02x to 0x%02x rc= %d\n",

			di->peek_poke_address, temp, rc);



	return rc;

}

DEFINE_SIMPLE_ATTRIBUTE(poke_poke_debug_ops, get_reg, set_reg, "0x%02llx\n");



static int fan53555_regulator_probe(struct i2c_client *client,

				const struct i2c_device_id *id)

{
@@ -591,8 +626,27 @@ static int fan53555_regulator_probe(struct i2c_client *client, 
	ret = fan53555_regulator_register(di, &config);

	if (ret < 0)

		dev_err(&client->dev, "Failed to register regulator!\n");

	return ret;



	di->debug_root = debugfs_create_dir("fan53555", NULL);

	if (!di->debug_root)

		dev_err(&client->dev, "Couldn't create debug dir\n");



	if (di->debug_root) {

		struct dentry *ent;



		ent = debugfs_create_x32("address", S_IFREG | 0644,

					  di->debug_root,

					  &(di->peek_poke_address));

		if (!ent)

			dev_err(&client->dev, "Couldn't create address debug file\n");



		ent = debugfs_create_file("data", S_IFREG | 0644,

					  di->debug_root, di,

					  &poke_poke_debug_ops);

		if (!ent)

			dev_err(&client->dev, "Couldn't create data debug file\n");

	}

	return ret;

}



static const struct i2c_device_id fan53555_id[] = {