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Message-ID: <20250604104656.38752-4-j-choudhary@ti.com>
Date: Wed, 4 Jun 2025 16:16:56 +0530
From: Jayesh Choudhary <j-choudhary@...com>
To: <nm@...com>, <vigneshr@...com>, <devicetree@...r.kernel.org>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
<conor+dt@...nel.org>, <r-donadkar@...com>,
<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<j-choudhary@...com>
Subject: [PATCH 3/3] arm64: dts: ti: k3-j721s2-common-proc-board: Enable analog audio support
The audio support on J721S2-EVM is using PCM3168A codec
connected to McASP4 serializers.
- Add the nodes for sound-card, audio codec, MAIN_I2C3 and
McASP4.
- Add pinmux for I2C3, McASP4, AUDIO_EXT_REFCLK1 and
WKUP_GPIO_0.
- Add necessary GPIO hogs to route the MAIN_I2C3 lines and
McASP serializer.
- Add idle-state as 1 in mux0 and mux1 to route McASP signals
Signed-off-by: Jayesh Choudhary <j-choudhary@...com>
---
.../dts/ti/k3-j721s2-common-proc-board.dts | 131 ++++++++++++++++++
1 file changed, 131 insertions(+)
diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
index e2fc1288ed07..9c6a3515847e 100644
--- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
@@ -128,6 +128,28 @@ transceiver4: can-phy4 {
standby-gpios = <&exp_som 7 GPIO_ACTIVE_HIGH>;
mux-states = <&mux1 1>;
};
+
+ codec_audio: sound {
+ compatible = "ti,j7200-cpb-audio";
+ model = "j721e-cpb";
+
+ ti,cpb-mcasp = <&mcasp4>;
+ ti,cpb-codec = <&pcm3168a_1>;
+
+ clocks = <&k3_clks 213 0>, <&k3_clks 213 1>,
+ <&k3_clks 157 299>, <&k3_clks 157 328>;
+ clock-names = "cpb-mcasp-auxclk", "cpb-mcasp-auxclk-48000",
+ "cpb-codec-scki", "cpb-codec-scki-48000";
+ };
+
+ i2c_mux: mux-controller-2 {
+ compatible = "gpio-mux";
+ #mux-state-cells = <1>;
+ mux-gpios = <&wkup_gpio0 54 GPIO_ACTIVE_HIGH>;
+ idle-state = <1>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_i2c3_mux_pins_default>;
+ };
};
&main_pmx0 {
@@ -195,6 +217,22 @@ J721S2_IOPAD(0x03c, PIN_INPUT, 0) /* (U27) MCASP0_AFSX.MCAN5_RX */
J721S2_IOPAD(0x038, PIN_OUTPUT, 0) /* (AB28) MCASP0_ACLKX.MCAN5_TX */
>;
};
+
+ mcasp4_pins_default: mcasp4-default-pins {
+ pinctrl-single,pins = <
+ J721S2_IOPAD(0x0c8, PIN_OUTPUT_PULLDOWN, 1) /* (AD28) MCASP4_ACLKX */
+ J721S2_IOPAD(0x06c, PIN_OUTPUT_PULLDOWN, 1) /* (V26) MCASP4_AFSX */
+ J721S2_IOPAD(0x068, PIN_INPUT_PULLDOWN, 1) /* (U28) MCASP4_AXR1 */
+ J721S2_IOPAD(0x0c4, PIN_OUTPUT_PULLDOWN, 1) /* (AB26) MCASP4_AXR2 */
+ J721S2_IOPAD(0x070, PIN_OUTPUT_PULLDOWN, 1) /* (R27) MCASP4_AXR3 */
+ >;
+ };
+
+ audio_ext_refclk1_pins_default: audio-ext-refclk1-default-pins {
+ pinctrl-single,pins = <
+ J721S2_IOPAD(0x078, PIN_OUTPUT, 1) /* (Y25) MCAN2_RX.AUDIO_EXT_REFCLK1 */
+ >;
+ };
};
&wkup_pmx2 {
@@ -292,6 +330,12 @@ J721S2_WKUP_IOPAD(0x104, PIN_INPUT, 0) /* (N26) MCU_ADC1_AIN6 */
J721S2_WKUP_IOPAD(0x108, PIN_INPUT, 0) /* (N27) MCU_ADC1_AIN7 */
>;
};
+
+ main_i2c3_mux_pins_default: main-i2c3-mux-default-pins {
+ pinctrl-single,pins = <
+ J721S2_WKUP_IOPAD(0x038, PIN_OUTPUT, 7) /* (B27) WKUP_GPIO0_54 */
+ >;
+ };
};
&wkup_pmx1 {
@@ -367,6 +411,22 @@ exp2: gpio@22 {
"MLB_MUX_SEL", "MCAN_MUX_SEL", "MCASP2/SPI3_MUX_SEL", "PCIe_CLKREQn_MUX_SEL",
"CDCI2_RSTZ", "ENET_EXP_PWRDN", "ENET_EXP_RESETZ", "ENET_I2CMUX_SEL",
"ENET_EXP_SPARE2", "M2PCIE_RTSZ", "USER_INPUT1", "USER_LED1", "USER_LED2";
+
+ p09-hog {
+ /* P09 - MCASP/TRACE_MUX_S0 */
+ gpio-hog;
+ gpios = <9 GPIO_ACTIVE_HIGH>;
+ output-low;
+ line-name = "MCASP/TRACE_MUX_S0";
+ };
+
+ p10-hog {
+ /* P10 - MCASP/TRACE_MUX_S1 */
+ gpio-hog;
+ gpios = <10 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "MCASP/TRACE_MUX_S1";
+ };
};
};
@@ -539,3 +599,74 @@ &main_mcan5 {
pinctrl-0 = <&main_mcan5_pins_default>;
phys = <&transceiver4>;
};
+
+&mux0 {
+ idle-state = <0>;
+};
+
+&mux1 {
+ idle-state = <0>;
+};
+
+&exp_som {
+ p03-hog {
+ /* P03 - CANUART_MUX_SEL1 */
+ gpio-hog;
+ gpios = <3 GPIO_ACTIVE_HIGH>;
+ output-high;
+ line-name = "CANUART_MUX_SEL1";
+ };
+};
+
+&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>;
+ mux-states = <&i2c_mux 1>;
+
+ 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>;
+ /* C_AUDIO_REFCLK1 -> MCAN2_RX (Y25) */
+ 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>;
+ };
+};
+
+&mcasp4 {
+ status = "okay";
+ #sound-dai-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&mcasp4_pins_default>;
+ op-mode = <0>; /* MCASP_IIS_MODE */
+ tdm-slots = <2>;
+ auxclk-fs-ratio = <256>;
+ serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
+ 0 2 1 1
+ 0 0 0 0
+ 0 0 0 0
+ 0 0 0 0
+ >;
+};
--
2.34.1
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