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Commit dbe21408 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: Make pmdown_time runtime configurable 



Provide a sysfs file allowing userspace to inspect and change the
pmdown_time setting at runtime.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 96dd3622

sound/soc/soc-core.c

+27 −0
Original line number Diff line number Diff line
@@ -130,6 +130,29 @@ static ssize_t codec_reg_show(struct device *dev, 


static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);



static ssize_t pmdown_time_show(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	struct snd_soc_device *socdev = dev_get_drvdata(dev);

	struct snd_soc_card *card = socdev->card;



	return sprintf(buf, "%d\n", card->pmdown_time);

}



static ssize_t pmdown_time_set(struct device *dev,

			       struct device_attribute *attr,

			       const char *buf, size_t count)

{

	struct snd_soc_device *socdev = dev_get_drvdata(dev);

	struct snd_soc_card *card = socdev->card;



	strict_strtol(buf, 10, &card->pmdown_time);



	return count;

}



static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);



#ifdef CONFIG_DEBUG_FS

static int codec_reg_open_file(struct inode *inode, struct file *file)

{
@@ -1124,6 +1147,10 @@ static void snd_soc_instantiate_card(struct snd_soc_card *card) 
	if (ret < 0)

		printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");



	ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);

	if (ret < 0)

		printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");



	ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);

	if (ret < 0)

		printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");