ASoC: Add initial driver for the WM8400 CODEC

The WM8400 is a highly integrated audio CODEC and power management unit
intended for mobile multimedia application.  This driver supports the
primary audio CODEC features, including:

 - 1W speaker driver
 - Fully differential headphone output
 - Up to 4 differential microphone inputs

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/mfd/wm8400-audio.h b/include/linux/mfd/wm8400-audio.h
index b6640e018046..e06ed3eb1d0a 100644
--- a/include/linux/mfd/wm8400-audio.h
+++ b/include/linux/mfd/wm8400-audio.h
@@ -1181,6 +1181,7 @@
 #define WM8400_FLL_OUTDIV_SHIFT                      0  /* FLL_OUTDIV - [2:0] */
 #define WM8400_FLL_OUTDIV_WIDTH                      3  /* FLL_OUTDIV - [2:0] */
 
+struct wm8400;
 void wm8400_reset_codec_reg_cache(struct wm8400 *wm8400);
 
 #endif