ASoC: samsung: Allow setting OP_CLK of the IIS Multi Audio Interface

This patch adds support for setting source clock of the "Core CLK"
of the IIS Multi Audio Interface.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/samsung/i2s.c

@@ -451,6 +451,10 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
 	u32 mod = readl(i2s->addr + I2SMOD);
 
 	switch (clk_id) {
+	case SAMSUNG_I2S_OPCLK:
+		mod &= ~MOD_OPCLK_MASK;
+		mod |= dir;
+		break;
 	case SAMSUNG_I2S_CDCLK:
 		/* Shouldn't matter in GATING(CLOCK_IN) mode */
 		if (dir == SND_SOC_CLOCK_IN)

sound/soc/samsung/i2s.h

@@ -18,5 +18,6 @@
 #define SAMSUNG_I2S_RCLKSRC_0	0
 #define SAMSUNG_I2S_RCLKSRC_1	1
 #define SAMSUNG_I2S_CDCLK		2
+#define SAMSUNG_I2S_OPCLK		3
 
 #endif /* __SND_SOC_SAMSUNG_I2S_H */