[PATCH] ASoC: Add S3C64xx IIS CDCLK source selection

[Mark Brown]

CDCLK can either be an output generated by the CPU, intended for use
as the CODEC master clock, or an input (probably from the CODEC)
providing a master clock for the IIS block.

Signed-off-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
 arch/arm/plat-s3c/include/plat/regs-s3c2412-iis.h |    2 ++
 sound/soc/s3c24xx/s3c64xx-i2s.c                   |   13 +++++++++++++
 sound/soc/s3c24xx/s3c64xx-i2s.h                   |    1 +
 3 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/arch/arm/plat-s3c/include/plat/regs-s3c2412-iis.h b/arch/arm/plat-s3c/include/plat/regs-s3c2412-iis.h
index 07659da..abf2fbc 100644
--- a/arch/arm/plat-s3c/include/plat/regs-s3c2412-iis.h
+++ b/arch/arm/plat-s3c/include/plat/regs-s3c2412-iis.h
@@ -67,6 +67,8 @@
 #define S3C2412_IISMOD_BCLK_MASK	(3 << 1)
 #define S3C2412_IISMOD_8BIT		(1 << 0)
 
+#define S3C64XX_IISMOD_CDCLKCON		(1 << 12)
+
 #define S3C2412_IISPSR_PSREN		(1 << 15)
 
 #define S3C2412_IISFIC_TXFLUSH		(1 << 15)
diff --git a/sound/soc/s3c24xx/s3c64xx-i2s.c b/sound/soc/s3c24xx/s3c64xx-i2s.c
index 3c06c40..aaf4520 100644
--- a/sound/soc/s3c24xx/s3c64xx-i2s.c
+++ b/sound/soc/s3c24xx/s3c64xx-i2s.c
@@ -99,6 +99,19 @@ static int s3c64xx_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
 		iismod |= S3C64XX_IISMOD_IMS_SYSMUX;
 		break;
 
+	case S3C64XX_CLKSRC_CDCLK:
+		switch (dir) {
+		case SND_SOC_CLOCK_IN:
+			iismod |= S3C64XX_IISMOD_CDCLKCON;
+			break;
+		case SND_SOC_CLOCK_OUT:
+			iismod &= ~S3C64XX_IISMOD_CDCLKCON;
+			break;
+		default:
+			return -EINVAL;
+		}
+		break;
+
 	default:
 		return -EINVAL;
 	}
diff --git a/sound/soc/s3c24xx/s3c64xx-i2s.h b/sound/soc/s3c24xx/s3c64xx-i2s.h
index 02148ce..abe7253 100644
--- a/sound/soc/s3c24xx/s3c64xx-i2s.h
+++ b/sound/soc/s3c24xx/s3c64xx-i2s.h
@@ -25,6 +25,7 @@ struct clk;
 
 #define S3C64XX_CLKSRC_PCLK	(0)
 #define S3C64XX_CLKSRC_MUX	(1)
+#define S3C64XX_CLKSRC_CDCLK    (2)
 
 extern struct snd_soc_dai s3c64xx_i2s_dai[];
 
-- 
1.6.3.3