linux-kernel - Re: [PATCH v3 2/7] arm64: dts: ti: k3-j722s-main: Redefine USB1 node description

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Date: Tue, 28 May 2024 15:15:53 +0300
From: Roger Quadros <rogerq@...nel.org>
To: Siddharth Vadapalli <s-vadapalli@...com>, nm@...com, vigneshr@...com,
 afd@...com, kristo@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, u-kumar1@...com, danishanwar@...com,
 srk@...com
Subject: Re: [PATCH v3 2/7] arm64: dts: ti: k3-j722s-main: Redefine USB1 node
 description



On 24/05/2024 12:05, Siddharth Vadapalli wrote:
> From: Ravi Gunasekaran <r-gunasekaran@...com>
> 
> USB1 controller on J722S and AM62P are from different vendors.
> Redefine the USB1 node description for J722S by deleting the
> node inherited from AM62P dtsi.
> 
> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
> Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
> ---
> v2:
> https://lore.kernel.org/r/20240513114443.16350-3-r-gunasekaran@ti.com/
> No changes since v2.
> 
> v1:
> https://lore.kernel.org/r/20240429120932.11456-3-r-gunasekaran@ti.com/
> Changes since v1:
> - The entire node which was added in k3-j722s.dtsi in v1 in now moved to
>   k3-j722s-main.dtsi as USB is a main domain peripheral.
> - Used generic node names - renamed "cdns-usb@...0000" to "usb@...0000".
> 
>  arch/arm64/boot/dts/ti/k3-j722s-main.dtsi | 39 +++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi b/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
> index 0dac8f1e1291..b069cecebfd9 100644
> --- a/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j722s-main.dtsi
> @@ -6,6 +6,13 @@
>  
>  #include <dt-bindings/phy/phy-ti.h>
>  
> +/*
> + * USB1 controller on AM62P and J722S are of different IP.
> + * Delete AM62P's USBSS1 node definition and redefine it for J722S.
> + */
> +
> +/delete-node/ &usbss1;
> +

This is odd and indicates issues with current DT file inclusion.
We need to split out the non common IPs (e.g. USB) out of the common k3-am62p-main.dtsi file Maybe call it k3-am62-main-common.dtsi.
Only keep am62p specific stuff in k3-am62p-main.dtsi.

Include k3-am62-main-common.dtsi and k3-am62p-main.dtsi for AM62P
Include k3-am62-main-common.dtsi and k3-j722s-main.dtsi for J722S

This way you don't need to call /delete-node/

>  / {
>  	serdes_refclk: clk-0 {
>  		compatible = "fixed-clock";
> @@ -52,6 +59,38 @@ serdes0: serdes@...0000 {
>  			status = "disabled"; /* Needs lane config */
>  		};
>  	};
> +
> +	usbss1: usb@...0000 {
> +		compatible = "ti,j721e-usb";
> +		reg = <0x00 0x0f920000 0x00 0x100>;
> +		power-domains = <&k3_pds 278 TI_SCI_PD_EXCLUSIVE>;
> +		clocks = <&k3_clks 278 3>, <&k3_clks 278 1>;
> +		clock-names = "ref", "lpm";
> +		assigned-clocks = <&k3_clks 278 3>; /* USB2_REFCLK */
> +		assigned-clock-parents = <&k3_clks 278 4>; /* HF0SC0 */
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +		status = "disabled";
> +
> +		usb1: usb@...00000{
> +			compatible = "cdns,usb3";
> +			reg = <0x00 0x31200000 0x00 0x10000>,
> +			      <0x00 0x31210000 0x00 0x10000>,
> +			      <0x00 0x31220000 0x00 0x10000>;
> +			reg-names = "otg",
> +				    "xhci",
> +				    "dev";
> +			interrupts = <GIC_SPI 226 IRQ_TYPE_LEVEL_HIGH>, /* irq.0 */
> +				     <GIC_SPI 232 IRQ_TYPE_LEVEL_HIGH>, /* irq.6 */
> +				     <GIC_SPI 245 IRQ_TYPE_LEVEL_HIGH>; /* otgirq */
> +			interrupt-names = "host",
> +					  "peripheral",
> +					  "otg";
> +			maximum-speed = "super-speed";
> +			dr_mode = "otg";
> +		};
> +	};
>  };
>  
>  &main_conf {

-- 
cheers,
-roger