linux-kernel - [PATCHv2 1/4] ASoC: simple-card: add asoc_simple_card_fmt

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Date:	Tue, 2 Sep 2014 17:26:06 +0800
From:	Xiubo Li <Li.Xiubo@...escale.com>
To:	<broonie@...nel.org>, <perex@...ex.cz>, <lgirdwood@...il.com>,
	<tiwai@...e.de>, <moinejf@...e.fr>, <andrew@...n.ch>,
	<kuninori.morimoto.gx@...esas.com>, <jsarha@...com>,
	<devicetree@...r.kernel.org>, <alsa-devel@...a-project.org>,
	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>
CC:	<linux-kernel@...r.kernel.org>, Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCHv2 1/4] ASoC: simple-card: add asoc_simple_card_fmt_master() to simplify the code.

Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
---
 sound/soc/generic/simple-card.c | 61 ++++++++++++++++++++---------------------
 1 file changed, 29 insertions(+), 32 deletions(-)

diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
index 986d2c7..cad2b30 100644
--- a/sound/soc/generic/simple-card.c
+++ b/sound/soc/generic/simple-card.c
@@ -163,6 +163,26 @@ asoc_simple_card_sub_parse_of(struct device_node *np,
 	return 0;
 }
 
+static inline unsigned int
+asoc_simple_card_fmt_master(struct device_node *np,
+			    struct device_node *bitclkmaster,
+			    struct device_node *framemaster)
+{
+	switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
+	case 0x11:
+		return SND_SOC_DAIFMT_CBS_CFS;
+	case 0x10:
+		return SND_SOC_DAIFMT_CBS_CFM;
+	case 0x01:
+		return SND_SOC_DAIFMT_CBM_CFS;
+	default:
+		return SND_SOC_DAIFMT_CBM_CFM;
+	}
+
+	/* Shouldn't be here */
+	return -EINVAL;
+}
+
 static int asoc_simple_card_dai_link_of(struct device_node *node,
 					struct device *dev,
 					struct snd_soc_dai_link *dai_link,
@@ -172,7 +192,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 	struct device_node *np = NULL;
 	struct device_node *bitclkmaster = NULL;
 	struct device_node *framemaster = NULL;
-	unsigned int daifmt;
+	unsigned int daifmt, fmt;
 	char *name;
 	char prop[128];
 	char *prefix = "";
@@ -185,6 +205,7 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 					 &bitclkmaster, &framemaster);
 	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
 
+	/* Parse CPU DAI sub-node */
 	snprintf(prop, sizeof(prop), "%scpu", prefix);
 	np = of_get_child_by_name(node, prop);
 	if (!np) {
@@ -199,23 +220,11 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 	if (ret < 0)
 		goto dai_link_of_err;
 
-	dai_props->cpu_dai.fmt = daifmt;
-	switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
-	case 0x11:
-		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
-		break;
-	case 0x10:
-		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
-		break;
-	case 0x01:
-		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
-		break;
-	default:
-		dai_props->cpu_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
-		break;
-	}
-
+	fmt = asoc_simple_card_fmt_master(np, bitclkmaster, framemaster);
+	dai_props->cpu_dai.fmt = daifmt | fmt;
 	of_node_put(np);
+
+	/* Parse CODEC DAI sub-node */
 	snprintf(prop, sizeof(prop), "%scodec", prefix);
 	np = of_get_child_by_name(node, prop);
 	if (!np) {
@@ -240,21 +249,9 @@ static int asoc_simple_card_dai_link_of(struct device_node *node,
 			snd_soc_of_parse_daifmt(np, NULL, NULL, NULL) |
 			(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
 	} else {
-		dai_props->codec_dai.fmt = daifmt;
-		switch (((np == bitclkmaster) << 4) | (np == framemaster)) {
-		case 0x11:
-			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFM;
-			break;
-		case 0x10:
-			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBM_CFS;
-			break;
-		case 0x01:
-			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFM;
-			break;
-		default:
-			dai_props->codec_dai.fmt |= SND_SOC_DAIFMT_CBS_CFS;
-			break;
-		}
+		fmt = asoc_simple_card_fmt_master(np, bitclkmaster,
+						  framemaster);
+		dai_props->codec_dai.fmt = daifmt | fmt;
 	}
 
 	if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name) {
-- 
1.8.4

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