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regmap: Factor out debugfs register read 

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

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-10-03 12:45:37 +01:00
parent d058bb4961
commit bd9cc12f4a
1 changed files with 14 additions and 5 deletions
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19
drivers/base/regmap/regmap-debugfs.c
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@ -56,15 +56,15 @@ 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,
size_t count, loff_t *ppos)
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;
size_t buf_pos = 0;
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
/*