ALSA: hda - Add power on/off counter

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Added the power on/off counter and expose via sysfs files.
The sysfs files, power_on_acct and power_off_acct, are created under
each codec hwdep sysfs directory (e.g. /sys/class/sound/hwC0D0).
The files show the msec length of the codec power-on and power-off,
respectively.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

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Takashi Iwai 2009-11-11 09:34:25 +01:00

parent 8f217a226c

commit a2f6309e83

4 changed files with 67 additions and 0 deletions

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16

sound/pci/hda/hda_codec.c

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4

sound/pci/hda/hda_codec.h

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38

sound/pci/hda/hda_hwdep.c

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9

sound/pci/hda/hda_local.h

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