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Commit c3c5a19a authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Add debugfs listing of registered CODECs 



Help with diagnostics for machine driver setup by listing all the
registered CODECs in debugfs.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 6d6f8b83

sound/soc/soc-core.c

+32 −0
Original line number Diff line number Diff line
@@ -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);