ASoC: sun4i-codec: Revise comments for register definition macros

This revises existing comments in the register definition macros
section, and adds a few more, so that readers can clearly identify
the types of control registers.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sunxi/sun4i-codec.c b/sound/soc/sunxi/sun4i-codec.c
index 7b78f4045d3884921f7c250050045973b6570578..969d86b4cd447d21d90a4e01dee21d4bad050f49 100644 (file)
--- a/sound/soc/sunxi/sun4i-codec.c
+++ b/sound/soc/sunxi/sun4i-codec.c
@@ -38,7 +38,7 @@
 #include <sound/initval.h>
 #include <sound/dmaengine_pcm.h>
 
-/* Codec DAC register offsets and bit fields */
+/* Codec DAC digital controls and FIFO registers */
 #define SUN4I_CODEC_DAC_DPC                    (0x00)
 #define SUN4I_CODEC_DAC_DPC_EN_DA                      (31)
 #define SUN4I_CODEC_DAC_DPC_DVOL                       (12)
@@ -55,6 +55,8 @@
 #define SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH               (0)
 #define SUN4I_CODEC_DAC_FIFOS                  (0x08)
 #define SUN4I_CODEC_DAC_TXDATA                 (0x0c)
+
+/* Codec DAC side analog signal controls */
 #define SUN4I_CODEC_DAC_ACTL                   (0x10)
 #define SUN4I_CODEC_DAC_ACTL_DACAENR                   (31)
 #define SUN4I_CODEC_DAC_ACTL_DACAENL                   (30)
@@ -69,7 +71,7 @@
 #define SUN4I_CODEC_DAC_TUNE                   (0x14)
 #define SUN4I_CODEC_DAC_DEBUG                  (0x18)
 
-/* Codec ADC register offsets and bit fields */
+/* Codec ADC digital controls and FIFO registers */
 #define SUN4I_CODEC_ADC_FIFOC                  (0x1c)
 #define SUN4I_CODEC_ADC_FIFOC_ADC_FS                   (29)
 #define SUN4I_CODEC_ADC_FIFOC_EN_AD                    (28)
@@ -81,6 +83,8 @@
 #define SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH               (0)
 #define SUN4I_CODEC_ADC_FIFOS                  (0x20)
 #define SUN4I_CODEC_ADC_RXDATA                 (0x24)
+
+/* Codec ADC side analog signal controls */
 #define SUN4I_CODEC_ADC_ACTL                   (0x28)
 #define SUN4I_CODEC_ADC_ACTL_ADC_R_EN                  (31)
 #define SUN4I_CODEC_ADC_ACTL_ADC_L_EN                  (30)
@@ -93,10 +97,14 @@
 #define SUN4I_CODEC_ADC_ACTL_DDE                       (3)
 #define SUN4I_CODEC_ADC_DEBUG                  (0x2c)
 
-/* Other various ADC registers */
+/* FIFO counters */
 #define SUN4I_CODEC_DAC_TXCNT                  (0x30)
 #define SUN4I_CODEC_ADC_RXCNT                  (0x34)
+
+/* Calibration register (sun7i only) */
 #define SUN7I_CODEC_AC_DAC_CAL                 (0x38)
+
+/* Microphone controls (sun7i only) */
 #define SUN7I_CODEC_AC_MIC_PHONE_CAL           (0x3c)
 
 struct sun4i_codec {