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authorMark Brown <broonie@opensource.wolfsonmicro.com>2010-08-17 23:40:24 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-08-18 16:52:56 +0100
commite77125105bbfe71f325466cdf9a16e496c96ac7a (patch)
tree6b9cb2ca6c6e72fce194dcd9b927ef45d3141294 /sound/soc/atmel
parent720ffa4cf3f6b76c27737a9d57bd0e6cc6af1fba (diff)
downloadlinux-e77125105bbfe71f325466cdf9a16e496c96ac7a.tar.bz2
ASoC: Support non-crystal master clocks for WM8731
Instead of unconditionally enabling the crystal oscillator on the WM8731 only enable it when explicitly selected via set_sysclk(), allowing machine drivers to specify that they drive a clock into MCLK alone. This avoids any conflicts between the oscillator and the external MCLK source and saves power for systems which do not need the oscillator. This should also deliver a small power saving on systems using the crystal since the oscillator will only be enabled when the ADC or DAC is active. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Diffstat (limited to 'sound/soc/atmel')
-rw-r--r--sound/soc/atmel/sam9g20_wm8731.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
index 66a6f1879689..8399ac46cb33 100644
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -146,7 +146,7 @@ static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
"at91sam9g20ek_wm8731 "
": at91sam9g20ek_wm8731_init() called\n");
- ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
+ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
MCLK_RATE, SND_SOC_CLOCK_IN);
if (ret < 0) {
printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);