linux-kernel - [PATCH 1/1] ASoc: dwc: correct irq clear method

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Message-ID: <035301d0f9b5$c22cff30$4686fd90$@tangramtek.com>
Date:	Mon, 28 Sep 2015 14:20:22 +0800
From:	"yitian" <yitian.bu@...gramtek.com>
To:	<lgirdwood@...il.com>, <broonie@...nel.org>, <perex@...ex.cz>,
	<tiwai@...e.com>, <Andrew.Jackson@....com>, <wsa@...-dreams.de>
Cc:	<alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 1/1] ASoc: dwc: correct irq clear method

from Designware I2S datasheet, irq is cleared by reading from
TOR/ROR registers, rather than by writing into them.

Signed-off-by: Yitian Bu <yitian.bu@...gramtek.com>
---
 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 a3e97b4..0d28e3b 100644
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -131,10 +131,10 @@ 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));
 	}
 }
 
-- 
1.7.12.4

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