ASoC: Actively manage WM8903 DC servo configuration

Explicitly cache the DC servo offsets for digital paths in the driver,
allowing them to be preserved over suspend and resume, and ensure that
we recalibrate analogue outputs paths when they are in use so that we
cover any changes in the input offset.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8903.h b/sound/soc/codecs/wm8903.h
index e8490f3edd03..9ef394ae0dd3 100644
--- a/sound/soc/codecs/wm8903.h
+++ b/sound/soc/codecs/wm8903.h
@@ -75,6 +75,14 @@ extern int wm8903_mic_detect(struct snd_soc_codec *codec,
 #define WM8903_ANALOGUE_SPK_OUTPUT_CONTROL_0    0x41
 #define WM8903_DC_SERVO_0                       0x43
 #define WM8903_DC_SERVO_2                       0x45
+#define WM8903_DC_SERVO_4                       0x47
+#define WM8903_DC_SERVO_5                       0x48
+#define WM8903_DC_SERVO_6                       0x49
+#define WM8903_DC_SERVO_7                       0x4A
+#define WM8903_DC_SERVO_READBACK_1              0x51
+#define WM8903_DC_SERVO_READBACK_2              0x52
+#define WM8903_DC_SERVO_READBACK_3              0x53
+#define WM8903_DC_SERVO_READBACK_4              0x54
 #define WM8903_ANALOGUE_HP_0                    0x5A
 #define WM8903_ANALOGUE_LINEOUT_0               0x5E
 #define WM8903_CHARGE_PUMP_0                    0x62