File 0079-ASoc-Davinci-EVM-Config-12MHz-CLK-for-AIC3x-Codec.patch of Package kernel-adaptation-bbb-v3.12

From 592258ef4cd0e70fa967d1e7651b8e401094e1eb Mon Sep 17 00:00:00 2001
From: Cody Lacey <clacey@ti.com>
Date: Tue, 10 Dec 2013 12:38:08 -0600
Subject: [PATCH 79/96] ASoc: Davinci-EVM: Config 12MHz CLK for AIC3x Codec

The AIC3x Codec needs a 12MHz clock source.  If the
codec MCLK is connected to McASP AHCLKX or AHCLKR
then the 24MHz internal clock needs to be divided
by 2.
---
 sound/soc/davinci/davinci-evm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/davinci/davinci-evm.c b/sound/soc/davinci/davinci-evm.c
index b19ebda..91bff8c 100644
--- a/sound/soc/davinci/davinci-evm.c
+++ b/sound/soc/davinci/davinci-evm.c
@@ -227,6 +227,7 @@ static const struct snd_soc_dapm_route audio_map[] = {
 static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	struct snd_soc_dapm_context *dapm = &codec->dapm;
 	struct device_node *np = codec->card->dev->of_node;
 	int ret;
@@ -245,6 +246,11 @@ static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
 		snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
 	}
 
+	/* Divide McASP MCLK by 2 to provide 12MHz to codec */
+	ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, 2);
+	if (ret < 0)
+		return ret;
+
 	/* not connected */
 	snd_soc_dapm_disable_pin(dapm, "MONO_LOUT");
 	snd_soc_dapm_disable_pin(dapm, "HPLCOM");
-- 
1.9.1