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path: root/sound/pci/hda/hda_hwdep.c
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Diffstat (limited to 'sound/pci/hda/hda_hwdep.c')
-rw-r--r--sound/pci/hda/hda_hwdep.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index cc24e6721d7..d24328661c6 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -154,6 +154,44 @@ int /*__devinit*/ snd_hda_create_hwdep(struct hda_codec *codec)
return 0;
}
+#ifdef CONFIG_SND_HDA_POWER_SAVE
+static ssize_t power_on_acct_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+ struct hda_codec *codec = hwdep->private_data;
+ snd_hda_update_power_acct(codec);
+ return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_on_acct));
+}
+
+static ssize_t power_off_acct_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct snd_hwdep *hwdep = dev_get_drvdata(dev);
+ struct hda_codec *codec = hwdep->private_data;
+ snd_hda_update_power_acct(codec);
+ return sprintf(buf, "%u\n", jiffies_to_msecs(codec->power_off_acct));
+}
+
+static struct device_attribute power_attrs[] = {
+ __ATTR_RO(power_on_acct),
+ __ATTR_RO(power_off_acct),
+};
+
+int snd_hda_hwdep_add_power_sysfs(struct hda_codec *codec)
+{
+ struct snd_hwdep *hwdep = codec->hwdep;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(power_attrs); i++)
+ snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
+ hwdep->device, &power_attrs[i]);
+ return 0;
+}
+#endif /* CONFIG_SND_HDA_POWER_SAVE */
+
#ifdef CONFIG_SND_HDA_RECONFIG
/*