linux-kernel - Re: [PATCH v9 2/9] arm64: dts: ti: k3-j721s2-main: Add support for USB

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Date:   Mon, 20 Feb 2023 08:45:22 -0600
From:   Andrew Davis <afd@...com>
To:     Ravi Gunasekaran <r-gunasekaran@...com>, <nm@...com>,
        <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <s-vadapalli@...com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v9 2/9] arm64: dts: ti: k3-j721s2-main: Add support for
 USB

On 2/20/23 5:14 AM, Ravi Gunasekaran wrote:
> From: Aswath Govindraju <a-govindraju@...com>
> 
> Add support for single instance of USB 3.0 controller in J721S2 SoC.
> 
> Signed-off-by: Aswath Govindraju <a-govindraju@...com>
> Signed-off-by: Matt Ranostay <mranostay@...com>
> Link: https://lore.kernel.org/r/20221122101616.770050-2-mranostay@ti.com
> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
> ---
> I had reviewed this patch in the v5 series [1].
> Since I'm taking over upstreaming this series, I removed the self
> Reviewed-by tag.
> 
> Links:
> 
> [1] - https://lore.kernel.org/all/134c28a0-2d49-549c-dc8d-0887d8fd29c3@ti.com/
> 
>   arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi | 42 ++++++++++++++++++++++
>   1 file changed, 42 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> index 8915132efcc1..c0daa75116f9 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> @@ -26,6 +26,20 @@
>   		};
>   	};
>   
> +	scm_conf: syscon@...000 {
> +		compatible = "ti,j721e-system-controller", "syscon", "simple-mfd";
> +		reg = <0x00 0x00104000 0x00 0x18000>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0x00 0x00 0x00104000 0x18000>;
> +
> +		usb_serdes_mux: mux-controller@0 {
> +			compatible = "mmio-mux";
> +			#mux-control-cells = <1>;
> +			mux-reg-masks = <0x0 0x8000000>; /* USB0 to SERDES0 lane 1/3 mux */
> +		};
> +	};
> +
>   	gic500: interrupt-controller@...0000 {
>   		compatible = "arm,gic-v3";
>   		#address-cells = <2>;
> @@ -745,6 +759,34 @@
>   		};
>   	};
>   
> +	usbss0: cdns-usb@...4000 {

Since this cannot be used without additional pinmux information in the
board level dtb files, this can be set disabled in this include file. Then
set back to "okay" where you add the pinmux. Same for the OSPI and PCIe patches.

Andrew

> +		compatible = "ti,j721e-usb";
> +		reg = <0x00 0x04104000 0x00 0x100>;
> +		clocks = <&k3_clks 360 16>, <&k3_clks 360 15>;
> +		clock-names = "ref", "lpm";
> +		assigned-clocks = <&k3_clks 360 16>; /* USB2_REFCLK */
> +		assigned-clock-parents = <&k3_clks 360 17>;
> +		power-domains = <&k3_pds 360 TI_SCI_PD_EXCLUSIVE>;
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +		dma-coherent;
> +
> +		usb0: usb@...0000 {
> +			compatible = "cdns,usb3";
> +			reg = <0x00 0x06000000 0x00 0x10000>,
> +			      <0x00 0x06010000 0x00 0x10000>,
> +			      <0x00 0x06020000 0x00 0x10000>;
> +			reg-names = "otg", "xhci", "dev";
> +			interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "host", "peripheral", "otg";
> +			maximum-speed = "super-speed";
> +			dr_mode = "otg";
> +		};
> +	};
> +
>   	main_mcan0: can@...1000 {
>   		compatible = "bosch,m_can";
>   		reg = <0x00 0x02701000 0x00 0x200>,