ASoC: twl6040: Enable automatic power for phoenix 1.1

Phoenix 1.1 supports automatic power on sequence, a
verification is added to use it with new revision of
the chip.
Signed-off-by: Margarita Olaya Cabrera <magi.olaya@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/codecs/twl6040.c

@@ -1108,6 +1108,7 @@ static int twl6040_probe(struct snd_soc_codec *codec)
 	struct twl6040_data *priv;
 	int audpwron, naudint;
 	int ret = 0;
+	u8 icrev;
 
 	priv = kzalloc(sizeof(struct twl6040_data), GFP_KERNEL);
 	if (priv == NULL)
@@ -1116,13 +1117,17 @@ static int twl6040_probe(struct snd_soc_codec *codec)
 
 	priv->codec = codec;
 
-	if (twl_codec) {
+	twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &icrev, TWL6040_REG_ASICREV);
+
+	if (twl_codec && (icrev > 0))
 		audpwron = twl_codec->audpwron_gpio;
-		naudint = twl_codec->naudint_irq;
-	} else {
+	else
 		audpwron = -EINVAL;
+
+	if (twl_codec)
+		naudint = twl_codec->naudint_irq;
+	else
 		naudint = 0;
-	}
 
 	priv->audpwron = audpwron;
 	priv->naudint = naudint;