linux-kernel - [PATCH v2 3/3] riscv: dts: starfive: Add JH7110 PWM-DAC support

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Date:   Mon, 31 Jul 2023 11:28:29 +0800
From:   Hal Feng <hal.feng@...rfivetech.com>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        "Claudiu Beznea" <claudiu.beznea@...rochip.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Walker Chen <walker.chen@...rfivetech.com>,
        Xingyu Wu <xingyu.wu@...rfivetech.com>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        Hal Feng <hal.feng@...rfivetech.com>
CC:     <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 3/3] riscv: dts: starfive: Add JH7110 PWM-DAC support

Add PWM-DAC support for StarFive JH7110 SoC.

Reviewed-by: Walker Chen <walker.chen@...rfivetech.com>
Signed-off-by: Hal Feng <hal.feng@...rfivetech.com>
---
 .../jh7110-starfive-visionfive-2.dtsi         | 49 +++++++++++++++++++
 arch/riscv/boot/dts/starfive/jh7110.dtsi      | 13 +++++
 2 files changed, 62 insertions(+)

diff --git a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
index f874d31006a6..98373b743019 100644
--- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-2.dtsi
@@ -38,6 +38,33 @@ gpio-restart {
 		gpios = <&sysgpio 35 GPIO_ACTIVE_HIGH>;
 		priority = <224>;
 	};
+
+	pwmdac_codec: pwmdac-codec {
+		compatible = "linux,spdif-dit";
+		#sound-dai-cells = <0>;
+	};
+
+	sound-pwmdac {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "StarFive-PWMDAC-Sound-Card";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		simple-audio-card,dai-link@0 {
+			reg = <0>;
+			format = "left_j";
+			bitclock-master = <&sndcpu0>;
+			frame-master = <&sndcpu0>;
+
+			sndcpu0: cpu {
+				sound-dai = <&pwmdac>;
+			};
+
+			codec {
+				sound-dai = <&pwmdac_codec>;
+			};
+		};
+	};
 };
 
 &dvp_clk {
@@ -185,6 +212,12 @@ &i2c6 {
 	status = "okay";
 };
 
+&pwmdac {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwmdac_pins>;
+	status = "okay";
+};
+
 &spi0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&spi0_pins>;
@@ -254,6 +287,22 @@ GPOEN_SYS_I2C6_DATA,
 		};
 	};
 
+	pwmdac_pins: pwmdac-0 {
+		pwmdac-pins {
+			pinmux = <GPIOMUX(33, GPOUT_SYS_PWMDAC_LEFT,
+					      GPOEN_ENABLE,
+					      GPI_NONE)>,
+				 <GPIOMUX(34, GPOUT_SYS_PWMDAC_RIGHT,
+					      GPOEN_ENABLE,
+					      GPI_NONE)>;
+			bias-disable;
+			drive-strength = <2>;
+			input-disable;
+			input-schmitt-disable;
+			slew-rate = <0>;
+		};
+	};
+
 	spi0_pins: spi0-0 {
 		mosi-pins {
 			pinmux = <GPIOMUX(52, GPOUT_SYS_SPI0_TXD,
diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
index 05f843b8ca03..7f508b4475e0 100644
--- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
@@ -512,6 +512,19 @@ tdm: tdm@...90000 {
 			status = "disabled";
 		};
 
+		pwmdac: pwmdac@...b0000 {
+			compatible = "starfive,jh7110-pwmdac";
+			reg = <0x0 0x100b0000 0x0 0x1000>;
+			clocks = <&syscrg JH7110_SYSCLK_PWMDAC_APB>,
+				 <&syscrg JH7110_SYSCLK_PWMDAC_CORE>;
+			clock-names = "apb", "core";
+			resets = <&syscrg JH7110_SYSRST_PWMDAC_APB>;
+			dmas = <&dma 22>;
+			dma-names = "tx";
+			#sound-dai-cells = <0>;
+			status = "disabled";
+		};
+
 		usb0: usb@...00000 {
 			compatible = "starfive,jh7110-usb";
 			ranges = <0x0 0x0 0x10100000 0x100000>;
-- 
2.38.1