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| author | Ingo Molnar <mingo@elte.hu> | 2010-08-19 12:48:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-08-19 12:48:09 +0200 |
| commit | c8710ad38900153af7a3e6762e99c062cfa46443 (patch) | |
| tree | a0c0632274c4eb72f51e99a5861f71cffe65ea60 /include/sound/uda134x.h | |
| parent | 6016ee13db518ab1cd0cbf43fc2ad5712021e338 (diff) | |
| parent | 86397dc3ccfc0e17b7550d05eaf15fe91f6498dd (diff) | |
| download | talos-op-linux-c8710ad38900153af7a3e6762e99c062cfa46443.tar.gz talos-op-linux-c8710ad38900153af7a3e6762e99c062cfa46443.zip | |
Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
Diffstat (limited to 'include/sound/uda134x.h')
| -rw-r--r-- | include/sound/uda134x.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/sound/uda134x.h b/include/sound/uda134x.h index 509efb050176..e475659bd3be 100644 --- a/include/sound/uda134x.h +++ b/include/sound/uda134x.h @@ -18,6 +18,18 @@ struct uda134x_platform_data { struct l3_pins l3; void (*power) (int); int model; + /* + ALSA SOC usually puts the device in standby mode when it's not used + for sometime. If you unset is_powered_on_standby the driver will + turn off the ADC/DAC when this callback is invoked and turn it back + on when needed. Unfortunately this will result in a very light bump + (it can be audible only with good earphones). If this bothers you + set is_powered_on_standby, you will have slightly higher power + consumption. Please note that sending the L3 command for ADC is + enough to make the bump, so it doesn't make difference if you + completely take off power from the codec. + */ + int is_powered_on_standby; #define UDA134X_UDA1340 1 #define UDA134X_UDA1341 2 #define UDA134X_UDA1344 3 |
