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Commit ef49e4fa authored by Mark Brown's avatar Mark Brown
Browse files

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: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 34bad69c
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+48 −0
Original line number Diff line number Diff line
@@ -1304,6 +1304,47 @@ static const struct file_operations dapm_widget_power_fops = {
	.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 @@ void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm)
	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;