[PATCH v2] ASoC: soc-core: add snd_soc_of_parse_master_clkdir() for dt

[Xiubo Li <Li.Xiubo@freescale.com>]

This patch adds snd_soc_of_parse_master_clkdir() and supports below
style on dt:

master-clkdir-out;

If this property is absent 0 will be returned, 1 otherwise.
0 : SND_SOC_CLOCK_IN
1 : SND_SOC_CLOCK_OUT

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
---
 include/sound/soc.h  |  1 +
 sound/soc/soc-core.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 5a049d9..690f4f6 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1170,6 +1170,7 @@ int snd_soc_of_parse_card_name(struct snd_soc_card *card,
 			       const char *propname);
 int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
 				   const char *propname);
+unsigned int snd_soc_of_parse_master_clkdir(struct device_node *np);
 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
 				     const char *prefix);
 int snd_soc_of_get_dai_name(struct device_node *of_node,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index be88df5..f155207 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -4472,6 +4472,17 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_parse_audio_routing);
 
+unsigned int snd_soc_of_parse_master_clkdir(struct device_node *np)
+{
+	/*
+	 * check "master-clkdir-out"
+	 * false means SND_SOC_CLOCK_IN
+	 * true means SND_SOC_CLOCK_OUT
+	 */
+	return !!of_property_read_bool(np, "master-clkdir-out");
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_master_clkdir);
+
 unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
 				     const char *prefix)
 {
-- 
1.8.4