redonkable/alistair23-linux
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regmap: Expose the driver name in debugfs

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

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dimitris Papastamos 2012-02-22 14:20:09 +00:00 committed by Mark Brown
parent 09c6ecd394
commit f0c2319f9f
1 changed files with 32 additions and 0 deletions
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32
drivers/base/regmap/regmap-debugfs.c
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@ -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);