Reset FIFO logic and registers, and make sure REC and RPL functions and
FIFO service are disabled.
Signed-off-by: Karl Beldan <karl.beldan@xxxxxxxxxxxxxxxxx>
---
sound/soc/pxa/pxa2xx-i2s.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/sound/soc/pxa/pxa2xx-i2s.c b/sound/soc/pxa/pxa2xx-i2s.c
index 2f4b6e4..52862dc 100644
--- a/sound/soc/pxa/pxa2xx-i2s.c
+++ b/sound/soc/pxa/pxa2xx-i2s.c
@@ -370,6 +370,18 @@ static struct platform_driver pxa2xx_i2s_driver = {
static int __init pxa2xx_i2s_init(void)
{
clk_i2s = ERR_PTR(-ENOENT);
+
+ /*
+ * 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;
+ SACR1 = SACR1_DRPL | SACR1_DREC;
+ SAIMR &= ~(SAIMR_RFS | SAIMR_TFS);
+
return platform_driver_register(&pxa2xx_i2s_driver);
}
--
1.6.3.rc1.34.g0be9b
--
Karl
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