arm64: dts: ti: k3-j784s4-evm: Enable analog audio support

The audio support on J784S4-EVM is using PCM3168A[0] codec
connected to McASP0 serializers.

- Add the nodes for sound-card, audio codec, MAIN_I2C3 and
  McASP0.
- Add pinmux for I2C3, McASP0 and AUDIO_EXT_REFCLK1.
- Add necessary GPIO hogs to route the MAIN_I2C3 lines and
  McASP serializer.
- Add idle-state as 1 in mux1 to route McASP clock signals.

[0]: <https://www.ti.com/lit/gpn/pcm3168a>

Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Link: https://lore.kernel.org/r/20240626101645.36764-4-j-choudhary@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
index a4a6efcce3620bfa3fec087d9c586b5f4ec76933..9338d987180d7560e56e4b720b50fc208480699f 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-j784s4-evm.dts
@@ -312,6 +312,20 @@
                compatible = "gpio-mux";
                #mux-state-cells = <1>;
                mux-gpios = <&exp2 14 GPIO_ACTIVE_HIGH>;
+               idle-state = <1>;
+       };
+
+       codec_audio: sound {
+               compatible = "ti,j7200-cpb-audio";
+               model = "j784s4-cpb";
+
+               ti,cpb-mcasp = <&mcasp0>;
+               ti,cpb-codec = <&pcm3168a_1>;
+
+               clocks = <&k3_clks 265 0>, <&k3_clks 265 1>,
+                        <&k3_clks 157 34>, <&k3_clks 157 63>;
+               clock-names = "cpb-mcasp-auxclk", "cpb-mcasp-auxclk-48000",
+                             "cpb-codec-scki", "cpb-codec-scki-48000";
        };
 };
 
@@ -422,6 +436,28 @@
                        J784S4_IOPAD(0x0ec, PIN_OUTPUT, 6) /* (AN37) TIMER_IO1.USB0_DRVVBUS */
                >;
        };
+
+       main_i2c3_pins_default: main-i2c3-default-pins {
+               pinctrl-single,pins = <
+                       J784S4_IOPAD(0x064, PIN_INPUT, 13) /* (AF38) MCAN0_TX.I2C3_SCL */
+                       J784S4_IOPAD(0x060, PIN_INPUT, 13) /* (AE36) MCASP2_AXR1.I2C3_SDA */
+               >;
+       };
+
+       main_mcasp0_pins_default: main-mcasp0-default-pins {
+               pinctrl-single,pins = <
+                       J784S4_IOPAD(0x038, PIN_OUTPUT_PULLDOWN, 1) /* (AK35) MCASP0_ACLKX */
+                       J784S4_IOPAD(0x03c, PIN_OUTPUT_PULLDOWN, 1) /* (AK38) MCASP0_AFSX */
+                       J784S4_IOPAD(0x07c, PIN_OUTPUT_PULLDOWN, 1) /* (AJ38) MCASP0_AXR3 */
+                       J784S4_IOPAD(0x080, PIN_INPUT_PULLDOWN, 1) /* (AK34) MCASP0_AXR4 */
+               >;
+       };
+
+       audio_ext_refclk1_pins_default: audio-ext-refclk1-default-pins {
+               pinctrl-single,pins = <
+                       J784S4_IOPAD(0x078, PIN_OUTPUT, 1) /* (AH37) MCAN2_RX.AUDIO_EXT_REFCLK1 */
+               >;
+       };
 };
 
 &wkup_pmx2 {
@@ -881,6 +917,14 @@
                                  "PCIE0_4L_RC_RSTZ", "PCIE0_4L_EP_RST_EN", "PCIE1_4L_PRSNT#",
                                  "PCIE0_4L_PRSNT#", "CDCI1_OE1/OE4", "CDCI1_OE2/OE3",
                                  "AUDIO_MUX_SEL", "EXP_MUX2", "EXP_MUX3", "GESI_EXP_PHY_RSTZ";
+
+               p12-hog {
+                       /* P12 - AUDIO_MUX_SEL */
+                       gpio-hog;
+                       gpios = <12 GPIO_ACTIVE_HIGH>;
+                       output-low;
+                       line-name = "AUDIO_MUX_SEL";
+               };
        };
 
        exp2: gpio@22 {
@@ -896,6 +940,22 @@
                                  "CANUART_MUX1_SEL1", "ENET1_EXP_PWRDN", "ENET1_EXP_RESETZ",
                                  "ENET1_I2CMUX_SEL", "ENET1_EXP_SPARE2", "ENET2_EXP_RESETZ",
                                  "USER_INPUT1", "USER_LED1", "USER_LED2";
+
+               p13-hog {
+                       /* P13 - CANUART_MUX_SEL0 */
+                       gpio-hog;
+                       gpios = <13 GPIO_ACTIVE_HIGH>;
+                       output-high;
+                       line-name = "CANUART_MUX_SEL0";
+               };
+
+               p15-hog {
+                       /* P15 - CANUART_MUX1_SEL1 */
+                       gpio-hog;
+                       gpios = <15 GPIO_ACTIVE_HIGH>;
+                       output-high;
+                       line-name = "CANUART_MUX1_SEL1";
+               };
        };
 };
 
@@ -1373,3 +1433,54 @@
        phys = <&serdes1_pcie0_link>;
        phy-names = "pcie-phy";
 };
+
+&k3_clks {
+       /* Confiure AUDIO_EXT_REFCLK1 pin as output */
+       pinctrl-names = "default";
+       pinctrl-0 = <&audio_ext_refclk1_pins_default>;
+};
+
+&main_i2c3 {
+       status = "okay";
+       pinctrl-names = "default";
+       pinctrl-0 = <&main_i2c3_pins_default>;
+       clock-frequency = <400000>;
+
+       exp3: gpio@20 {
+               compatible = "ti,tca6408";
+               reg = <0x20>;
+               gpio-controller;
+               #gpio-cells = <2>;
+       };
+
+       pcm3168a_1: audio-codec@44 {
+               compatible = "ti,pcm3168a";
+               reg = <0x44>;
+               #sound-dai-cells = <1>;
+               reset-gpios = <&exp3 0 GPIO_ACTIVE_LOW>;
+               clocks = <&audio_refclk1>;
+               clock-names = "scki";
+               VDD1-supply = <&vsys_3v3>;
+               VDD2-supply = <&vsys_3v3>;
+               VCCAD1-supply = <&vsys_5v0>;
+               VCCAD2-supply = <&vsys_5v0>;
+               VCCDA1-supply = <&vsys_5v0>;
+               VCCDA2-supply = <&vsys_5v0>;
+       };
+};
+
+&mcasp0 {
+       status = "okay";
+       #sound-dai-cells = <0>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&main_mcasp0_pins_default>;
+       op-mode = <0>;          /* MCASP_IIS_MODE */
+       tdm-slots = <2>;
+       auxclk-fs-ratio = <256>;
+       serial-dir = <  /* 0: INACTIVE, 1: TX, 2: RX */
+               0 0 0 1
+               2 0 0 0
+               0 0 0 0
+               0 0 0 0
+       >;
+};