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-rw-r--r--include/sound/uda134x.h12
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