linux-kernel - Re: [PATCH 2/2] arm64: dts: ti: k3-am62p: add the USB sub-system

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Message-ID: <0bc7081f-f279-4741-b14e-198b2d00d5d0@linaro.org>
Date: Fri, 26 Jan 2024 16:11:46 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Roger Quadros <rogerq@...nel.org>, nm@...com, vigneshr@...com
Cc: afd@...com, kristo@...nel.org, robh+dt@...nel.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, srk@...com,
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: ti: k3-am62p: add the USB sub-system

On 26/01/2024 13:59, Roger Quadros wrote:
> From: Vignesh Raghavendra <vigneshr@...com>
> 
> There are two USB instances available on the am62p5 starter kit. Include
> and enable them for use on the board.
> 
> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
> Signed-off-by: Roger Quadros <rogerq@...nel.org>
> ---
>  arch/arm64/boot/dts/ti/k3-am62p-main.dtsi | 46 ++++++++++++++++
>  arch/arm64/boot/dts/ti/k3-am62p5-sk.dts   | 67 +++++++++++++++++++++++
>  2 files changed, 113 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
> index 4c51bae06b57..7e7cd749d9a5 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
> @@ -560,6 +560,52 @@ sdhci2: mmc@...0000 {
>  		status = "disabled";
>  	};
>  
> +	usbss0: dwc3-usb@...0000 {

usb@

> +		compatible = "ti,am62-usb";
> +		reg = <0x00 0x0f900000 0x00 0x800>;
> +		clocks = <&k3_clks 161 3>;
> +		clock-names = "ref";
> +		ti,syscon-phy-pll-refclk = <&usb0_phy_ctrl 0x0>;
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		power-domains = <&k3_pds 178 TI_SCI_PD_EXCLUSIVE>;
> +		ranges;
> +		status = "disabled";
> +
> +		usb0: usb@...00000 {
> +			compatible = "snps,dwc3";
> +			reg = <0x00 0x31000000 0x00 0x50000>;
> +			interrupts = <GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>, /* irq.0 */
> +			<GIC_SPI 188 IRQ_TYPE_LEVEL_HIGH>; /* irq.0 */
> +			interrupt-names = "host", "peripheral";
> +			maximum-speed = "high-speed";
> +			dr_mode = "otg";
> +		};
> +	};
> +
> +	usbss1: dwc3-usb@...0000 {

usb@

> +		compatible = "ti,am62-usb";
> +		reg = <0x00 0x0f910000 0x00 0x800>;
> +		clocks = <&k3_clks 162 3>;
> +		clock-names = "ref";
> +		ti,syscon-phy-pll-refclk = <&usb1_phy_ctrl 0x0>;
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		power-domains = <&k3_pds 179 TI_SCI_PD_EXCLUSIVE>;
> +		ranges;
> +		status = "disabled";
> +
> +		usb1: usb@...00000 {
> +			compatible = "snps,dwc3";
> +			reg = <0x00 0x31100000 0x00 0x50000>;
> +			interrupts = <GIC_SPI 226 IRQ_TYPE_LEVEL_HIGH>, /* irq.0 */
> +			<GIC_SPI 226 IRQ_TYPE_LEVEL_HIGH>; /* irq.0 */
> +			interrupt-names = "host", "peripheral";
> +			maximum-speed = "high-speed";
> +			dr_mode = "otg";
> +		};
> +	};
> +
>  	fss: bus@...0000 {
>  		compatible = "simple-bus";
>  		reg = <0x00 0x0fc00000 0x00 0x70000>;
> diff --git a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> index 1773c05f752c..7a16e7a8ac66 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
> @@ -27,6 +27,8 @@ aliases {
>  		spi0 = &ospi0;
>  		ethernet0 = &cpsw_port1;
>  		ethernet1 = &cpsw_port2;
> +		usb0 = &usb0;
> +		usb1 = &usb1;
>  	};
>  
>  	chosen {
> @@ -297,6 +299,12 @@ AM62PX_IOPAD(0x01b0, PIN_OUTPUT, 2) /* (G20) MCASP0_ACLKR.UART1_TXD */
>  		bootph-all;
>  	};
>  
> +	main_usb1_pins_default: main-usb1-default-pins {
> +		pinctrl-single,pins = <
> +			AM62PX_IOPAD(0x0258, PIN_INPUT, 0) /* (G21) USB1_DRVVBUS */
> +		>;
> +	};
> +
>  	main_wlirq_pins_default: main-wlirq-default-pins {
>  		pinctrl-single,pins = <
>  			AM62PX_IOPAD(0x0128, PIN_INPUT, 7) /* (K25) MMC2_SDWP.GPIO0_72 */
> @@ -340,6 +348,36 @@ AM62PX_IOPAD(0x0124, PIN_INPUT, 7) /* (J25) MMC2_SDCD.GPIO0_71 */
>  	};
>  };
>  
> +&main_i2c0 {
> +	status = "okay";
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&main_i2c0_pins_default>;
> +	clock-frequency = <400000>;
> +
> +	typec_pd0: tps6598x@3f {

Node names should be generic. See also an explanation and list of
examples (not exhaustive) in DT specification:
https://devicetree-specification.readthedocs.io/en/latest/chapter2-devicetree-basics.html#generic-names-recommendation


> +		compatible = "ti,tps6598x";
> +		reg = <0x3f>;
> +
> +		connector {
> +			compatible = "usb-c-connector";
> +			label = "USB-C";
> +			self-powered;
> +			data-role = "dual";
> +			power-role = "sink";
> +			ports {


Best regards,
Krzysztof