ARM: dts: cm-t335: add audio support

The TLV320AIC23B codec is connected to the CPU by McASP controller 1 for
data and I2C0 for control.

Modifications:
- Enable and configure McASP controller 1.
- Add TLV320AIC23B codec pinmux.
- Add TLV320AIC23B codec configurations.
- Use simple-audio-card as CPU to codec glue.
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-cm-t335.dts

@@ -46,6 +46,36 @@ backlight {
 		brightness-levels = <0 51 53 56 62 75 101 152 255>;
 		default-brightness-level = <8>;
 	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "cm-t335";
+
+		simple-audio-card,widgets =
+			"Microphone", "Mic Jack",
+			"Line", "Line In",
+			"Headphone", "Headphone Jack";
+
+		simple-audio-card,routing =
+			"Headphone Jack", "LHPOUT",
+			"Headphone Jack", "RHPOUT",
+			"LLINEIN", "Line In",
+			"RLINEIN", "Line In",
+			"MICIN", "Mic Jack";
+
+		simple-audio-card,format = "i2s";
+		simple-audio-card,bitclock-master = <&sound_master>;
+		simple-audio-card,frame-master = <&sound_master>;
+
+		simple-audio-card,cpu {
+			sound-dai = <&mcasp1>;
+		};
+
+		sound_master: simple-audio-card,codec {
+			sound-dai = <&tlv320aic23>;
+			system-clock-frequency = <12000000>;
+		};
+	};
 };
 
 &am33xx_pinmux {
@@ -248,6 +278,20 @@ bluetooth_pins: pinmux_bluetooth_pins {
 			AM33XX_IOPAD(0x9b0, PIN_OUTPUT_PULLUP | MUX_MODE7)
 		>;
 	};
+
+	/* TLV320AIC23B codec */
+	mcasp1_pins: pinmux_mcasp1_pins {
+		pinctrl-single,pins = <
+			/* MII1_CRS.mcasp1_aclkx */
+			AM33XX_IOPAD(0x90c, PIN_INPUT_PULLDOWN | MUX_MODE4)
+			/* MII1_RX_ER.mcasp1_fsx */
+			AM33XX_IOPAD(0x910, PIN_INPUT_PULLDOWN | MUX_MODE4)
+			/* MII1_COL.mcasp1_axr2 */
+			AM33XX_IOPAD(0x908, PIN_INPUT_PULLDOWN | MUX_MODE4)
+			/* RMII1_REF_CLK.mcasp1_axr3 */
+			AM33XX_IOPAD(0x944, PIN_INPUT_PULLDOWN | MUX_MODE4)
+		>;
+	};
 };
 
 &uart0 {
@@ -282,6 +326,13 @@ ext_rtc: em3027@56 {
 		compatible = "emmicro,em3027";
 		reg = <0x56>;
 	};
+	/* Audio codec */
+	tlv320aic23: codec@1a {
+		compatible = "ti,tlv320aic23";
+		reg = <0x1a>;
+		#sound-dai-cells= <0>;
+		status = "okay";
+	};
 };
 
 &usb {
@@ -441,3 +492,21 @@ adc {
 	};
 };
 
+/* CPU audio */
+&mcasp1 {
+		pinctrl-names = "default";
+		pinctrl-0 = <&mcasp1_pins>;
+
+		op-mode = <0>;          /* MCASP_IIS_MODE */
+		tdm-slots = <2>;
+		/* 16 serializers */
+		num-serializer = <16>;
+		serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
+			0 0 2 1 0 0 0 0 0 0 0 0 0 0 0 0
+		>;
+		tx-num-evt = <1>;
+		rx-num-evt = <1>;
+
+		#sound-dai-cells= <0>;
+		status = "okay";
+};