linux-kernel - Re: [PATCH v6 2/8] arm64: dts: ti: k3-j721s2-main: Add SERDES and WIZ device tree node

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Date:   Tue, 22 Nov 2022 11:56:38 +0530
From:   Ravi Gunasekaran <r-gunasekaran@...com>
To:     Matt Ranostay <mranostay@...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 v6 2/8] arm64: dts: ti: k3-j721s2-main: Add SERDES and WIZ
 device tree node



On 19/11/22 9:39 am, Matt Ranostay wrote:
> Add dt node for the single instance of WIZ (SERDES wrapper) and
> SERDES module shared by PCIe, eDP and USB.
> 
> Signed-off-by: Matt Ranostay <mranostay@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi | 54 ++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> index b4869bff4f22..adbb172658b9 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi
> @@ -5,6 +5,17 @@
>   * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
>   */
>  
> +#include <dt-bindings/phy/phy-cadence.h>
> +#include <dt-bindings/phy/phy-ti.h>
> +
> +/ {
> +	serdes_refclk: clock-cmnrefclk {
> +		#clock-cells = <0>;
> +		compatible = "fixed-clock";
> +		clock-frequency = <0>;
> +	};
> +};
> +
>  &cbass_main {
>  	msmc_ram: sram@...00000 {
>  		compatible = "mmio-sram";
> @@ -38,6 +49,13 @@ usb_serdes_mux: mux-controller-0 {
>  			#mux-control-cells = <1>;
>  			mux-reg-masks = <0x0 0x8000000>; /* USB0 to SERDES0 lane 1/3 mux */
>  		};
> +
> +		serdes_ln_ctrl: mux-controller-80 {
> +			compatible = "mmio-mux";
> +			#mux-control-cells = <1>;
> +			mux-reg-masks = <0x80 0x3>, <0x84 0x3>, /* SERDES0 lane0/1 select */
> +					<0x88 0x3>, <0x8c 0x3>; /* SERDES0 lane2/3 select */
> +		};
>  	};
>  
>  	gic500: interrupt-controller@...0000 {
> @@ -787,6 +805,42 @@ usb0: usb@...0000 {
>  		};
>  	};
>  
> +	serdes_wiz0: wiz@...0000 {
> +		compatible = "ti,am64-wiz-10g";

Using compatible "ti,am64-wiz-10g" may cause issues as the wiz_data->type plays a role in serdes configuration
Please relook into this

> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		power-domains = <&k3_pds 365 TI_SCI_PD_EXCLUSIVE>;
> +		clocks = <&k3_clks 365 0>, <&k3_clks 365 3>, <&serdes_refclk>;
> +		clock-names = "fck", "core_ref_clk", "ext_ref_clk";
> +		num-lanes = <4>;
> +		#reset-cells = <1>;
> +		#clock-cells = <1>;
> +		ranges = <0x5060000 0x0 0x5060000 0x10000>;
> +
> +		assigned-clocks = <&k3_clks 365 3>;
> +		assigned-clock-parents = <&k3_clks 365 7>;
> +
> +		serdes0: serdes@...0000 {
> +			compatible = "ti,j721e-serdes-10g";
> +			reg = <0x05060000 0x00010000>;
> +			reg-names = "torrent_phy";
> +			resets = <&serdes_wiz0 0>;
> +			reset-names = "torrent_reset";
> +			clocks = <&serdes_wiz0 TI_WIZ_PLL0_REFCLK>,
> +				 <&serdes_wiz0 TI_WIZ_PHY_EN_REFCLK>;
> +			clock-names = "refclk", "phy_en_refclk";
> +			assigned-clocks = <&serdes_wiz0 TI_WIZ_PLL0_REFCLK>,
> +					  <&serdes_wiz0 TI_WIZ_PLL1_REFCLK>,
> +					  <&serdes_wiz0 TI_WIZ_REFCLK_DIG>;
> +			assigned-clock-parents = <&k3_clks 365 3>,
> +						 <&k3_clks 365 3>,
> +						 <&k3_clks 365 3>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			#clock-cells = <1>;
> +		};
> +	};
> +
>  	main_mcan0: can@...1000 {
>  		compatible = "bosch,m_can";
>  		reg = <0x00 0x02701000 0x00 0x200>,

-- 
Regards,
Ravi