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ASoC: pxa2xx-i2s: Proper initialization

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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>
This commit is contained in:
Karl Beldan 2009-05-11 23:49:41 +02:00 • committed by Mark Brown
parent 13e2c86c20
commit 8c10dc4f54
1 changed files with 13 additions and 0 deletions
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13
sound/soc/pxa/pxa2xx-i2s.c
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@ -347,6 +347,19 @@ static int pxa2xx_i2s_probe(struct platform_device *dev)
if (ret != 0) if (ret != 0)
clk_put(clk_i2s); 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; return ret;
} }