linux-kernel - Re: [PATCH v8 2/3] dts: zynqmp: add properties for TCM in remoteproc

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Message-ID: <ZZWfUkrQc58+GATN@p14s>
Date: Wed, 3 Jan 2024 10:54:26 -0700
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: Tanmay Shah <tanmay.shah@....com>
Cc: andersson@...nel.org, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	michal.simek@....com, ben.levinsky@....com,
	linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/3] dts: zynqmp: add properties for TCM in remoteproc

Hi Tanmay,

On Fri, Dec 15, 2023 at 03:57:24PM -0800, Tanmay Shah wrote:
> Add properties as per new bindings in zynqmp remoteproc node
> to represent TCM address and size.
> 
> This patch also adds alternative remoteproc node to represent
> remoteproc cluster in split mode. By default lockstep mode is
> enabled and users should disable it before using split mode
> dts. Both device-tree nodes can't be used simultaneously one
> of them must be disabled. For zcu102-1.0 and zcu102-1.1 board
> remoteproc split mode dts node is enabled and lockstep mode
> dts is disabled.
> 
> Signed-off-by: Tanmay Shah <tanmay.shah@....com>
> ---
>  .../boot/dts/xilinx/zynqmp-zcu102-rev1.0.dts  |  8 +++
>  arch/arm64/boot/dts/xilinx/zynqmp.dtsi        | 60 +++++++++++++++++--
>  2 files changed, 63 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-rev1.0.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-rev1.0.dts
> index c8f71a1aec89..495ca94b45db 100644
> --- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-rev1.0.dts
> +++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-rev1.0.dts
> @@ -14,6 +14,14 @@ / {
>  	compatible = "xlnx,zynqmp-zcu102-rev1.0", "xlnx,zynqmp-zcu102", "xlnx,zynqmp";
>  };
>  
> +&rproc_split {
> +	status = "okay";
> +};
> +
> +&rproc_lockstep {
> +	status = "disabled";
> +};
> +
>  &eeprom {
>  	#address-cells = <1>;
>  	#size-cells = <1>;
> diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> index b61fc99cd911..602e6aba7ac5 100644
> --- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> +++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> @@ -247,19 +247,69 @@ fpga_full: fpga-full {
>  		ranges;
>  	};
>  
> -	remoteproc {
> +	rproc_lockstep: remoteproc@...00000 {
>  		compatible = "xlnx,zynqmp-r5fss";
>  		xlnx,cluster-mode = <1>;
>  
> -		r5f-0 {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +
> +		ranges = <0x0 0x0 0x0 0xffe00000 0x0 0x20000>,
> +			 <0x0 0x20000 0x0 0xffe20000 0x0 0x20000>,
> +			 <0x1 0x0 0x0 0xffe90000 0x0 0x10000>,
> +			 <0x1 0x20000 0x0 0xffeb0000 0x0 0x10000>;

As far as I can tell, in lockstep mode the last two entries are not needed.
This is also contrasting with that is in the bindings, which is quite confusing.

> +
> +		r5f@0 {
> +			compatible = "xlnx,zynqmp-r5f";
> +			reg = <0x0 0x0 0x0 0x20000>, <0x0 0x20000 0x0 0x20000>;
> +			reg-names = "atcm", "btcm";
> +			power-domains = <&zynqmp_firmware PD_RPU_0>,
> +					<&zynqmp_firmware PD_R5_0_ATCM>,
> +					<&zynqmp_firmware PD_R5_0_BTCM>;
> +			memory-region = <&rproc_0_fw_image>;
> +		};
> +
> +		r5f@1 {
> +			compatible = "xlnx,zynqmp-r5f";
> +			reg = <0x1 0x0 0x0 0x10000>, <0x1 0x20000 0x0 0x10000>;
> +			reg-names = "atcm", "btcm";
> +			power-domains = <&zynqmp_firmware PD_RPU_1>,
> +					<&zynqmp_firmware PD_R5_1_ATCM>,
> +					<&zynqmp_firmware PD_R5_1_BTCM>;
> +			memory-region = <&rproc_1_fw_image>;
> +		};
> +	};
> +
> +	rproc_split: remoteproc-split@...00000 {
> +		status = "disabled";
> +		compatible = "xlnx,zynqmp-r5fss";
> +		xlnx,cluster-mode = <0>;
> +
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +
> +		ranges = <0x0 0x0 0x0 0xffe00000 0x0 0x10000>,
> +			 <0x0 0x20000 0x0 0xffe20000 0x0 0x10000>,
> +			 <0x1 0x0 0x0 0xffe90000 0x0 0x10000>,
> +			 <0x1 0x20000 0x0 0xffeb0000 0x0 0x10000>;
> +
> +		r5f@0 {
>  			compatible = "xlnx,zynqmp-r5f";
> -			power-domains = <&zynqmp_firmware PD_RPU_0>;
> +			reg = <0x0 0x0 0x0 0x10000>, <0x0 0x20000 0x0 0x10000>;
> +			reg-names = "atcm", "btcm";
> +			power-domains = <&zynqmp_firmware PD_RPU_0>,
> +					<&zynqmp_firmware PD_R5_0_ATCM>,
> +					<&zynqmp_firmware PD_R5_0_BTCM>;
>  			memory-region = <&rproc_0_fw_image>;
>  		};
>  
> -		r5f-1 {
> +		r5f@1 {
>  			compatible = "xlnx,zynqmp-r5f";
> -			power-domains = <&zynqmp_firmware PD_RPU_1>;
> +			reg = <0x1 0x0 0x0 0x10000>, <0x1 0x20000 0x0 0x10000>;
> +			reg-names = "atcm", "btcm";
> +			power-domains = <&zynqmp_firmware PD_RPU_1>,
> +					<&zynqmp_firmware PD_R5_1_ATCM>,
> +					<&zynqmp_firmware PD_R5_1_BTCM>;
>  			memory-region = <&rproc_1_fw_image>;
>  		};
>  	};
> -- 
> 2.25.1
>