Commit 19c7ac27 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Add platform listing to debugfs 



List registered platforms in debugfs to improve debugability of machine
drivers.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent f3208780

sound/soc/soc-core.c

+32 −0
Original line number Diff line number Diff line
@@ -323,6 +323,34 @@ static const struct file_operations dai_list_fops = { 
	.llseek = default_llseek,/* read accesses f_pos */

};



static ssize_t platform_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_platform *platform;



	if (!buf)

		return -ENOMEM;



	list_for_each_entry(platform, &platform_list, list)

		ret += snprintf(buf + ret, PAGE_SIZE - ret, "%s\n",

				platform->name);



	if (ret >= 0)

		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);



	kfree(buf);



	return ret;

}



static const struct file_operations platform_list_fops = {

	.read = platform_list_read_file,

	.llseek = default_llseek,/* read accesses f_pos */

};



#else



static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
@@ -3252,6 +3280,10 @@ static int __init snd_soc_init(void) 
	if (!debugfs_create_file("dais", 0444, debugfs_root, NULL,

				 &dai_list_fops))

		pr_warn("ASoC: Failed to create DAI list debugfs file\n");



	if (!debugfs_create_file("platforms", 0444, debugfs_root, NULL,

				 &platform_list_fops))

		pr_warn("ASoC: Failed to create platform list debugfs file\n");

#endif



	return platform_driver_register(&soc_driver);