exynos: Add support for exynos5420 i2s pinmux

Allow setting the i2s pinmux correctly on exyno5420 so that i2c can be
used on that SoC. Also rename EXYNOS_AUDSS to something consistent with
other naming.
Signed-off-by: NSimon Glass <sjg@chromium.org>

arch/arm/mach-exynos/clock.c

@@ -1317,6 +1317,19 @@ int exynos5_set_epll_clk(unsigned long rate)
 	return 0;
 }
 
+static int exynos5420_set_i2s_clk_source(void)
+{
+	struct exynos5420_clock *clk =
+		(struct exynos5420_clock *)samsung_get_base_clock();
+
+	setbits_le32(&clk->src_top6, EXYNOS5420_CLK_SRC_MOUT_EPLL);
+	clrsetbits_le32(&clk->src_mau, EXYNOS5420_AUDIO0_SEL_MASK,
+			(EXYNOS5420_CLK_SRC_SCLK_EPLL));
+	setbits_le32(EXYNOS5_AUDIOSS_BASE, 1 << 0);
+
+	return 0;
+}
+
 int exynos5_set_i2s_clk_source(unsigned int i2s_id)
 {
 	struct exynos5_clock *clk =
@@ -1758,8 +1771,12 @@ int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
 
 int set_i2s_clk_source(unsigned int i2s_id)
 {
-	if (cpu_is_exynos5())
-		return exynos5_set_i2s_clk_source(i2s_id);
+	if (cpu_is_exynos5()) {
+		if (proid_is_exynos542x())
+			return exynos5420_set_i2s_clk_source();
+		else
+			return exynos5_set_i2s_clk_source(i2s_id);
+	}
 
 	return 0;
 }

arch/arm/mach-exynos/include/mach/clock.h

@@ -1370,10 +1370,13 @@ struct set_epll_con_val {
 #define AUDIO_1_RATIO_MASK		0x0f
 
 #define AUDIO0_SEL_MASK			0xf
+#define EXYNOS5420_AUDIO0_SEL_MASK	(0x3 << 28)
 #define AUDIO1_SEL_MASK			0xf
 
 #define CLK_SRC_SCLK_EPLL		0x7
+#define EXYNOS5420_CLK_SRC_SCLK_EPLL	(0x6 << 28)
 #define CLK_SRC_MOUT_EPLL		(1<<12)
+#define EXYNOS5420_CLK_SRC_MOUT_EPLL	BIT(20)
 #define AUDIO_CLKMUX_ASS		(1<<0)
 
 /* CON0 bit-fields */

arch/arm/mach-exynos/pinmux.c

@@ -378,6 +378,20 @@ static void exynos5_i2s_config(int peripheral)
 	}
 }
 
+static void exynos5420_i2s_config(int peripheral)
+{
+	int i;
+
+	switch (peripheral) {
+	case PERIPH_ID_I2S0:
+		for (i = 0; i < 5; i++)
+			gpio_cfg_pin(EXYNOS5420_GPIO_Z0 + i,
+				     S5P_GPIO_FUNC(0x02));
+		break;
+	}
+}
+
+
 void exynos5_spi_config(int peripheral)
 {
 	int cfg = 0, pin = 0, i;
@@ -550,6 +564,9 @@ static int exynos5420_pinmux_config(int peripheral, int flags)
 	case PERIPH_ID_I2C10:
 		exynos5420_i2c_config(peripheral);
 		break;
+	case PERIPH_ID_I2S0:
+		exynos5420_i2s_config(peripheral);
+		break;
 	case PERIPH_ID_PWM0:
 		gpio_cfg_pin(EXYNOS5420_GPIO_B20, S5P_GPIO_FUNC(2));
 		break;