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Commit f0c2319f authored by Dimitris Papastamos's avatar Dimitris Papastamos Committed by Mark Brown
Browse files

regmap: Expose the driver name in debugfs 



Add a file called 'name' containing the name of the driver.

Signed-off-by: default avatarDimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 09c6ecd3

drivers/base/regmap/regmap-debugfs.c

+32 −0
Original line number Diff line number Diff line
@@ -33,6 +33,35 @@ static int regmap_open_file(struct inode *inode, struct file *file) 
	return 0;

}



static ssize_t regmap_name_read_file(struct file *file,

				     char __user *user_buf, size_t count,

				     loff_t *ppos)

{

	struct regmap *map = file->private_data;

	int ret;

	char *buf;



	buf = kmalloc(PAGE_SIZE, GFP_KERNEL);

	if (!buf)

		return -ENOMEM;



	ret = snprintf(buf, PAGE_SIZE, "%s\n", map->dev->driver->name);

	if (ret < 0) {

		kfree(buf);

		return ret;

	}



	ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);

	kfree(buf);

	return ret;

}



static const struct file_operations regmap_name_fops = {

	.open = regmap_open_file,

	.read = regmap_name_read_file,

	.llseek = default_llseek,

};



static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,

				    size_t count, loff_t *ppos)

{
@@ -228,6 +257,9 @@ void regmap_debugfs_init(struct regmap *map) 
		return;

	}



	debugfs_create_file("name", 0400, map->debugfs,

			    map, &regmap_name_fops);



	if (map->max_register) {

		debugfs_create_file("registers", 0400, map->debugfs,

				    map, &regmap_map_fops);