linux-kernel - Re: [PATCH 1/3] arm64: dts: ti: k3-j722s: Add support for SERDES0

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Message-ID: <41047a89-2787-422f-a643-3e2d850da6dd@kernel.org>
Date: Wed, 8 May 2024 14:59:21 +0300
From: Roger Quadros <rogerq@...nel.org>
To: Ravi Gunasekaran <r-gunasekaran@...com>, nm@...com, vigneshr@...com
Cc: kristo@...nel.org, robh@...nel.org, krzk+dt@...nel.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 1/3] arm64: dts: ti: k3-j722s: Add support for SERDES0



On 29/04/2024 15:09, Ravi Gunasekaran wrote:
> Add SERDES0 and its wrapper description to support USB3
> and SGMII interfaces.
> 
> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-j722s.dtsi | 54 ++++++++++++++++++++++++++++
>  1 file changed, 54 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j722s.dtsi b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
> index c75744edb143..beba5a3ea6cc 100644
> --- a/arch/arm64/boot/dts/ti/k3-j722s.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
> @@ -9,6 +9,7 @@
>  #include <dt-bindings/interrupt-controller/irq.h>
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/soc/ti,sci_pm_domain.h>
> +#include <dt-bindings/phy/phy-ti.h>
>  
>  #include "k3-am62p5.dtsi"
>  
> @@ -75,6 +76,50 @@
>  			 <0x00 0x78000000 0x00 0x78000000 0x00 0x00008000>,
>  			 <0x00 0x78100000 0x00 0x78100000 0x00 0x00008000>;
>  	};
> +
> +	serdes_refclk: clock-cmnrefclk {

What could be the generic name here?

> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <0>;
> +	};
> +
> +	serdes_wiz0: wiz@...0000 {

Should generic name be phy?

> +		compatible = "ti,am64-wiz-10g";
> +		ranges = <0x0f000000 0x0 0x0f000000 0x00010000>;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		power-domains = <&k3_pds 279 TI_SCI_PD_EXCLUSIVE>;
> +		clocks = <&k3_clks 279 0>, <&k3_clks 279 1>, <&serdes_refclk>;
> +		clock-names = "fck", "core_ref_clk", "ext_ref_clk";
> +		num-lanes = <1>;
> +		#reset-cells = <1>;
> +		#clock-cells = <1>;
> +
> +		assigned-clocks = <&k3_clks 279 1>;
> +		assigned-clock-parents = <&k3_clks 279 5>;
> +
> +		serdes0: serdes@...0000 {

here too?

> +			compatible = "ti,j721e-serdes-10g";
> +			reg = <0x0f000000 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 279 1>,
> +						 <&k3_clks 279 1>,
> +						 <&k3_clks 279 1>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			#clock-cells = <1>;
> +
> +			status = "disabled"; /* Needs lane config */
> +		};
> +	};
>  };
>  
>  /* Main domain overrides */
> @@ -83,6 +128,15 @@
>  	ti,interrupt-ranges = <7 71 21>;
>  };
>  
> +&main_conf {
> +	serdes0_ln_ctrl: mux-controller@...0 {
> +		compatible = "reg-mux";
> +		reg = <0x4080 0x4>;
> +		#mux-control-cells = <1>;
> +		mux-reg-masks = <0x0 0x3>; /* SERDES0 lane0 select */
> +	};
> +};
> +
>  &oc_sram {
>  	reg = <0x00 0x70000000 0x00 0x40000>;
>  	ranges = <0x00 0x00 0x70000000 0x40000>;

-- 
cheers,
-roger