[alsa-devel] [PATCH 11/15] ASoC: twl6040: Clear interrupt status at boot time

[Olaya, Margarita]

From: Jorge Eduardo Candelaria <jorge.candelaria at ti.com>

On Phoenix 1.1, the INTID register default value is an invalid
one, causing the interrupt handler to think the phoenix power on
sequence is ready before it actually finishes.

This causes some i2c errors when trying to configure twl.

Signed-off-by: Jorge Eduardo Candelaria <jorge.candelaria at ti.com>
Signed-off-by: Margarita Olaya Cabrera <magi.olaya at ti.com>
---
 sound/soc/codecs/twl6040.c |   21 +++++++++++----------
 1 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
index b2402ae..17a8715 100644
--- a/sound/soc/codecs/twl6040.c
+++ b/sound/soc/codecs/twl6040.c
@@ -1627,6 +1627,17 @@ static int twl6040_probe(struct snd_soc_codec *codec)
 			goto gpio2_err;
 
 		priv->codec_powered = 0;
+
+		/* enable only codec ready interrupt */
+		twl6040_write(codec, TWL6040_REG_INTMR,
+					~TWL6040_READYMSK & TWL6040_ALLINT_MSK);
+
+		/* reset interrupt status to allow correct power up sequence */
+		twl6040_read_reg_volatile(codec, TWL6040_REG_INTID);
+	} else {
+		/* no interrupts at all */
+		twl6040_write_reg_cache(codec, TWL6040_REG_INTMR,
+						TWL6040_ALLINT_MSK);
 	}
 
 	if (naudint) {
@@ -1637,16 +1648,6 @@ static int twl6040_probe(struct snd_soc_codec *codec)
 				"twl6040_codec", codec);
 		if (ret)
 			goto gpio2_err;
-	} else {
-		if (gpio_is_valid(audpwron)) {
-			/* enable only codec ready interrupt */
-			twl6040_write_reg_cache(codec, TWL6040_REG_INTMR,
-					~TWL6040_READYMSK & TWL6040_ALLINT_MSK);
-		} else {
-			/* no interrupts at all */
-			twl6040_write_reg_cache(codec, TWL6040_REG_INTMR,
-						TWL6040_ALLINT_MSK);
-		}
 	}
 
 	/* init vio registers */
-- 
1.7.0.4