linux-kernel - [PATCH v8 3/4] riscv: dts: starfive: jh7100: Add PWM node and pins configuration

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Message-ID: <20231129092732.43387-4-william.qiu@starfivetech.com>
Date:   Wed, 29 Nov 2023 17:27:31 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-riscv@...ts.infradead.org>, <linux-pwm@...r.kernel.org>
CC:     Emil Renner Berthing <kernel@...il.dk>,
        Rob Herring <robh+dt@...nel.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        "Hal Feng" <hal.feng@...rfivetech.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        William Qiu <william.qiu@...rfivetech.com>
Subject: [PATCH v8 3/4] riscv: dts: starfive: jh7100: Add PWM node and pins configuration

Add OpenCores PWM controller node and add PWM pins configuration
on VisionFive 1 board.

Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
---
 .../boot/dts/starfive/jh7100-common.dtsi      | 24 +++++++++++++++++++
 arch/riscv/boot/dts/starfive/jh7100.dtsi      |  9 +++++++
 2 files changed, 33 insertions(+)

diff --git a/arch/riscv/boot/dts/starfive/jh7100-common.dtsi b/arch/riscv/boot/dts/starfive/jh7100-common.dtsi
index b93ce351a90f..11876906cc05 100644
--- a/arch/riscv/boot/dts/starfive/jh7100-common.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7100-common.dtsi
@@ -84,6 +84,24 @@ GPO_I2C2_PAD_SDA_OEN,
 		};
 	};
 
+	pwm_pins: pwm-0 {
+		pwm-pins {
+			pinmux = <GPIOMUX(7,
+				  GPO_PWM_PAD_OUT_BIT0,
+				  GPO_PWM_PAD_OE_N_BIT0,
+				  GPI_NONE)>,
+				 <GPIOMUX(5,
+				  GPO_PWM_PAD_OUT_BIT1,
+				  GPO_PWM_PAD_OE_N_BIT1,
+				  GPI_NONE)>;
+			bias-disable;
+			drive-strength = <35>;
+			input-disable;
+			input-schmitt-disable;
+			slew-rate = <0>;
+		};
+	};
+
 	uart3_pins: uart3-0 {
 		rx-pins {
 			pinmux = <GPIOMUX(13, GPO_LOW, GPO_DISABLE,
@@ -154,6 +172,12 @@ &osc_aud {
 	clock-frequency = <27000000>;
 };
 
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm_pins>;
+	status = "okay";
+};
+
 &uart3 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart3_pins>;
diff --git a/arch/riscv/boot/dts/starfive/jh7100.dtsi b/arch/riscv/boot/dts/starfive/jh7100.dtsi
index e68cafe7545f..4f5eb2f60856 100644
--- a/arch/riscv/boot/dts/starfive/jh7100.dtsi
+++ b/arch/riscv/boot/dts/starfive/jh7100.dtsi
@@ -280,6 +280,15 @@ watchdog@...80000 {
 				 <&rstgen JH7100_RSTN_WDT>;
 		};
 
+		pwm: pwm@...90000 {
+			compatible = "starfive,jh7100-pwm", "opencores,pwm-v1";
+			reg = <0x0 0x12490000 0x0 0x10000>;
+			clocks = <&clkgen JH7100_CLK_PWM_APB>;
+			resets = <&rstgen JH7100_RSTN_PWM_APB>;
+			#pwm-cells = <3>;
+			status = "disabled";
+		};
+
 		sfctemp: temperature-sensor@...a0000 {
 			compatible = "starfive,jh7100-temp";
 			reg = <0x0 0x124a0000 0x0 0x10000>;
-- 
2.34.1