diff options
Diffstat (limited to 'sound/soc')
| -rw-r--r-- | sound/soc/soc-core.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 42542e0da2a3..94a2edf9cfd5 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -270,6 +270,33 @@ static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec) debugfs_remove_recursive(codec->debugfs_codec_root); } +static ssize_t codec_list_read_file(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); + ssize_t ret = 0; + struct snd_soc_codec *codec; + + if (!buf) + return -ENOMEM; + + list_for_each_entry(codec, &codec_list, list) + ret += snprintf(buf + ret, PAGE_SIZE - ret, "%s\n", + codec->name); + + if (ret >= 0) + ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret); + + kfree(buf); + + return ret; +} + +static const struct file_operations codec_list_fops = { + .read = codec_list_read_file, + .llseek = default_llseek,/* read accesses f_pos */ +}; + #else static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec) @@ -3191,6 +3218,11 @@ static int __init snd_soc_init(void) "ASoC: Failed to create debugfs directory\n"); debugfs_root = NULL; } + + if (!debugfs_create_file("codecs", 0444, debugfs_root, NULL, + &codec_list_fops)) + pr_warn("ASoC: Failed to create CODEC list debugfs file\n"); + #endif return platform_driver_register(&soc_driver); |