aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMark Brown <broonie@opensource.wolfsonmicro.com>2009-04-22 20:32:40 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-04-22 21:37:30 +0100
commit4dbfe8097157fde1f8054f48f991ea45833852cd (patch)
treee0a4e3c7e1b81febc5946b3b24f0235f9f45e13c
parentc2aef4ffd24dab5c8e94c66e4042ad39d38bcf39 (diff)
ASoC: Optimise configuration of WM8903 DC servo
Modify the default startup sequence in the chip to set the DC servo dither level for optimal performance. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
-rw-r--r--sound/soc/codecs/wm8903.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index 27c8b94c055..de0a5850720 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -978,6 +978,11 @@ static int wm8903_set_bias_level(struct snd_soc_codec *codec,
wm8903_write(codec, WM8903_CLOCK_RATES_2,
WM8903_CLK_SYS_ENA);
+ /* Change DC servo dither level in startup sequence */
+ wm8903_write(codec, WM8903_WRITE_SEQUENCER_0, 0x11);
+ wm8903_write(codec, WM8903_WRITE_SEQUENCER_1, 0x1257);
+ wm8903_write(codec, WM8903_WRITE_SEQUENCER_2, 0x2);
+
wm8903_run_sequence(codec, 0);
wm8903_sync_reg_cache(codec, codec->reg_cache);