ASoC: TWL4030: Add 4 channel TDM support

Support for 4 channel TDM (SND_SOC_DAIFMT_DSP_A) for twl4030
codec.
The channel allocations are:
Playback:
TDM         i2s   TWL RX
Channel 1   Left  SDRL2
Channel 3   Right SDRR2
Channel 2   --    SDRL1
Channel 4   --    SDRR1

Capture:
TDM         i2s   TWL TX
Channel 1   Left  TXL1
Channel 3   Right TXR1
Channel 2   --    TXL2
Channel 4   --    TXR2

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/sound/soc/codecs/twl4030.h b/sound/soc/codecs/twl4030.h
index 981ec609495b..3441115136f6 100644
--- a/sound/soc/codecs/twl4030.h
+++ b/sound/soc/codecs/twl4030.h
@@ -116,6 +116,17 @@
 #define TWL4030_OPTION_1                (1 << 0)
 #define TWL4030_OPTION_2                (0 << 0)
 
+/* TWL4030_OPTION (0x02) Fields */
+
+#define TWL4030_ATXL1_EN                (1 << 0)
+#define TWL4030_ATXR1_EN                (1 << 1)
+#define TWL4030_ATXL2_VTXL_EN           (1 << 2)
+#define TWL4030_ATXR2_VTXR_EN           (1 << 3)
+#define TWL4030_ARXL1_VRX_EN            (1 << 4)
+#define TWL4030_ARXR1_EN                (1 << 5)
+#define TWL4030_ARXL2_EN                (1 << 6)
+#define TWL4030_ARXR2_EN                (1 << 7)
+
 /* TWL4030_REG_MICBIAS_CTL (0x04) Fields */
 
 #define TWL4030_MICBIAS2_CTL            0x40