Commit bd9cc12f authored by Mark Brown's avatar Mark Brown
Browse files

regmap: Factor out debugfs register read 



This will allow the use of the same code for reading register ranges.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent d058bb49

drivers/base/regmap/regmap-debugfs.c

+14 −5
Original line number Diff line number Diff line
@@ -56,7 +56,8 @@ static const struct file_operations regmap_name_fops = { 
	.llseek = default_llseek,

};



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

static ssize_t regmap_read_debugfs(struct regmap *map, unsigned int from,

				   unsigned int to, char __user *user_buf,

				   size_t count, loff_t *ppos)

{

	int reg_len, val_len, tot_len;
@@ -64,7 +65,6 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, 
	loff_t p = 0;

	ssize_t ret;

	int i;

	struct regmap *map = file->private_data;

	char *buf;

	unsigned int val;
@@ -80,7 +80,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, 
	val_len = 2 * map->format.val_bytes;

	tot_len = reg_len + val_len + 3;      /* : \n */



	for (i = 0; i <= map->max_register; i += map->reg_stride) {

	for (i = from; i <= to; i += map->reg_stride) {

		if (!regmap_readable(map, i))

			continue;
@@ -95,7 +95,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, 


			/* Format the register */

			snprintf(buf + buf_pos, count - buf_pos, "%.*x: ",

				 reg_len, i);

				 reg_len, i - from);

			buf_pos += reg_len + 2;



			/* Format the value, write all X if we can't read */
@@ -126,6 +126,15 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, 
	return ret;

}



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

				    size_t count, loff_t *ppos)

{

	struct regmap *map = file->private_data;



	return regmap_read_debugfs(map, 0, map->max_register, user_buf,

				   count, ppos);

}



#undef REGMAP_ALLOW_WRITE_DEBUGFS

#ifdef REGMAP_ALLOW_WRITE_DEBUGFS

/*