ASoC: Add bias level data to DAPM context debugfs
This is also in the old sysfs diagnostics but it's nice to have everything
in one place.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 81c4052..05da8a8 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -1304,6 +1304,47 @@
.llseek = default_llseek,
};
+static int dapm_bias_open_file(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t dapm_bias_read_file(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct snd_soc_dapm_context *dapm = file->private_data;
+ char *level;
+
+ switch (dapm->bias_level) {
+ case SND_SOC_BIAS_ON:
+ level = "On\n";
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ level = "Prepare\n";
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ level = "Standby\n";
+ break;
+ case SND_SOC_BIAS_OFF:
+ level = "Off\n";
+ break;
+ default:
+ BUG();
+ level = "Unknown\n";
+ break;
+ }
+
+ return simple_read_from_buffer(user_buf, count, ppos, level,
+ strlen(level));
+}
+
+static const struct file_operations dapm_bias_fops = {
+ .open = dapm_bias_open_file,
+ .read = dapm_bias_read_file,
+ .llseek = default_llseek,
+};
+
void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
{
struct snd_soc_dapm_widget *w;
@@ -1312,6 +1353,13 @@
if (!dapm->debugfs_dapm)
return;
+ d = debugfs_create_file("bias_level", 0444,
+ dapm->debugfs_dapm, dapm,
+ &dapm_bias_fops);
+ if (!d)
+ dev_warn(dapm->dev,
+ "ASoC: Failed to create bias level debugfs file\n");
+
list_for_each_entry(w, &dapm->card->widgets, list) {
if (!w->name || w->dapm != dapm)
continue;