ASoC: wm8741: Add differential mono mode support
The WM8741 DAC supports several differential output modes (stereo,
stereo reversed, mono left, mono right). Add platform data and DT
bindings to configure it.
Signed-off-by: Sergej Sawazki <ce3a@gmx.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/wm8741.h b/sound/soc/codecs/wm8741.h
index 56c1b1d..c8835f6 100644
--- a/sound/soc/codecs/wm8741.h
+++ b/sound/soc/codecs/wm8741.h
@@ -194,6 +194,12 @@
#define WM8741_DITHER_SHIFT 0 /* DITHER - [1:0] */
#define WM8741_DITHER_WIDTH 2 /* DITHER - [1:0] */
+/* DIFF field values */
+#define WM8741_DIFF_MODE_STEREO 0 /* stereo normal */
+#define WM8741_DIFF_MODE_STEREO_REVERSED 2 /* stereo reversed */
+#define WM8741_DIFF_MODE_MONO_LEFT 1 /* mono left */
+#define WM8741_DIFF_MODE_MONO_RIGHT 3 /* mono right */
+
/*
* R32 (0x20) - ADDITONAL_CONTROL_1
*/
@@ -208,4 +214,8 @@
#define WM8741_SYSCLK 0
+struct wm8741_platform_data {
+ u32 diff_mode; /* Differential Output Mode */
+};
+
#endif