diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/regmap/regmap-debugfs.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c index 7accb81dd94e..c32b60a93ceb 100644 --- a/drivers/base/regmap/regmap-debugfs.c +++ b/drivers/base/regmap/regmap-debugfs.c @@ -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, ®map_name_fops); + if (map->max_register) { debugfs_create_file("registers", 0400, map->debugfs, map, ®map_map_fops); |