[PATCH 3.19.y-ckt 050/155] ASoC: dwc: correct irq clear method

From: Kamal Mostafa
Date: Thu Nov 12 2015 - 18:58:20 EST


3.19.8-ckt10 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Yitian Bu <buyitian@xxxxxxxxx>

commit 4873867e5f2bd90faad861dd94865099fc3140f3 upstream.

from Designware I2S datasheet, tx/rx XRUN irq is cleared by
reading register TOR/ROR, rather than by writing into them.

Signed-off-by: Yitian Bu <yitian.bu@xxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
sound/soc/dwc/designware_i2s.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
index 8d18bbd..ee0a392 100644
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -100,10 +100,10 @@ static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream)

if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
for (i = 0; i < 4; i++)
- i2s_write_reg(dev->i2s_base, TOR(i), 0);
+ i2s_read_reg(dev->i2s_base, TOR(i));
} else {
for (i = 0; i < 4; i++)
- i2s_write_reg(dev->i2s_base, ROR(i), 0);
+ i2s_read_reg(dev->i2s_base, ROR(i));
}
}

--
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/