pinctrl: sun4i: add spdif to pin description.

Signed-off-by: NMarcus Cooper <codekipper@gmail.com>
Reviewed-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/sunxi/pinctrl-sun4i-a10.c

@@ -135,7 +135,14 @@ static const struct sunxi_desc_pin sun4i_a10_pins[] = {
 	SUNXI_PIN(SUNXI_PINCTRL_PIN(B, 3),
 		  SUNXI_FUNCTION(0x0, "gpio_in"),
 		  SUNXI_FUNCTION(0x1, "gpio_out"),
-		  SUNXI_FUNCTION(0x2, "ir0")),		/* TX */
+		  SUNXI_FUNCTION(0x2, "ir0"),		/* TX */
+		/*
+		 * The SPDIF block is not referenced at all in the A10 user
+		 * manual. However it is described in the code leaked and the
+		 * pin descriptions are declared in the A20 user manual which
+		 * is pin compatible with this device.
+		 */
+		  SUNXI_FUNCTION(0x4, "spdif")),        /* SPDIF MCLK */
 	SUNXI_PIN(SUNXI_PINCTRL_PIN(B, 4),
 		  SUNXI_FUNCTION(0x0, "gpio_in"),
 		  SUNXI_FUNCTION(0x1, "gpio_out"),
@@ -176,11 +183,15 @@ static const struct sunxi_desc_pin sun4i_a10_pins[] = {
 		  SUNXI_FUNCTION(0x0, "gpio_in"),
 		  SUNXI_FUNCTION(0x1, "gpio_out"),
 		  SUNXI_FUNCTION(0x2, "i2s"),		/* DI */
-		  SUNXI_FUNCTION(0x3, "ac97")),		/* DI */
+		  SUNXI_FUNCTION(0x3, "ac97"),		/* DI */
+		/* Undocumented mux function - See SPDIF MCLK above */
+		  SUNXI_FUNCTION(0x4, "spdif")),        /* SPDIF IN */
 	SUNXI_PIN(SUNXI_PINCTRL_PIN(B, 13),
 		  SUNXI_FUNCTION(0x0, "gpio_in"),
 		  SUNXI_FUNCTION(0x1, "gpio_out"),
-		  SUNXI_FUNCTION(0x2, "spi2")),		/* CS1 */
+		  SUNXI_FUNCTION(0x2, "spi2"),		/* CS1 */
+		/* Undocumented mux function - See SPDIF MCLK above */
+		  SUNXI_FUNCTION(0x4, "spdif")),        /* SPDIF OUT */
 	SUNXI_PIN(SUNXI_PINCTRL_PIN(B, 14),
 		  SUNXI_FUNCTION(0x0, "gpio_in"),
 		  SUNXI_FUNCTION(0x1, "gpio_out"),