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| author | Karl Beldan <karl.beldan@gmail.com> | 2009-05-11 23:49:41 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2009-05-13 19:16:00 +0100 |
| commit | 8c10dc4f54d315ce801dc9ef4018aab8d0d75a7b (patch) | |
| tree | 03619108d7862575a3bb393bce50f9918496f91f | |
| parent | 13e2c86c20f5d07b20d5a6dee24bcdd2b30b859f (diff) | |
| download | lwn-8c10dc4f54d315ce801dc9ef4018aab8d0d75a7b.tar.gz lwn-8c10dc4f54d315ce801dc9ef4018aab8d0d75a7b.zip | |
ASoC: pxa2xx-i2s: Proper initialization
Reset FIFO logic and registers, and make sure REC and RPL functions along
with FIFO service are disabled at probe.
Signed-off-by: Karl Beldan <karl.beldan@mobile-devices.fr>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| -rw-r--r-- | sound/soc/pxa/pxa2xx-i2s.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sound/soc/pxa/pxa2xx-i2s.c b/sound/soc/pxa/pxa2xx-i2s.c index 60145770aeba..fce8a2894e2c 100644 --- a/sound/soc/pxa/pxa2xx-i2s.c +++ b/sound/soc/pxa/pxa2xx-i2s.c @@ -347,6 +347,19 @@ static int pxa2xx_i2s_probe(struct platform_device *dev) if (ret != 0) clk_put(clk_i2s); + /* + * PXA Developer's Manual: + * If SACR0[ENB] is toggled in the middle of a normal operation, + * the SACR0[RST] bit must also be set and cleared to reset all + * I2S controller registers. + */ + SACR0 = SACR0_RST; + SACR0 = 0; + /* Make sure RPL and REC are disabled */ + SACR1 = SACR1_DRPL | SACR1_DREC; + /* Along with FIFO servicing */ + SAIMR &= ~(SAIMR_RFS | SAIMR_TFS); + return ret; } |