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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-02-12 14:37:24 +0300
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-02-16 22:14:52 +0300
commitdbe21408b15f04da4f80fb89a27b7cb067d6103e (patch)
tree1ed935aa9d45b62cc49c302ee22e647e464c816d /sound
parent96dd362284ddcb546d2783035ae7eeda73692eda (diff)
downloadlinux-dbe21408b15f04da4f80fb89a27b7cb067d6103e.tar.xz
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: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/soc-core.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 94b9cde26139..c2008bc9c64a 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -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");