linux-kernel - Re: [PATCH v2] arm64: dts: Add support for Stratix 10 Software Virtual Platform

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Date:   Thu, 2 Jun 2022 20:37:00 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     wen.ping.teh@...el.com, Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2] arm64: dts: Add support for Stratix 10 Software
 Virtual Platform

On 02/06/2022 16:11, wen.ping.teh@...el.com wrote:
> From: Teh Wen Ping <wen.ping.teh@...el.com>
> 
> Add Stratix 10 Software Virtual Platform device tree
> 
> Signed-off-by: Teh Wen Ping <wen.ping.teh@...el.com>
> ---
> 
> changes in v2:
> -remove indentation before GPL
> -change root compatible to "altr,socfpga-stratix10"
> -remove bootargs
> -move clock-frequency to label
> -remove l2-cache
> -remove no longer exist authors from commit message
> 
>  arch/arm64/Kconfig.platforms                  |   3 +-
>  arch/arm64/boot/dts/altera/Makefile           |   3 +-
>  .../dts/altera/socfpga_stratix10_swvp.dts     | 117 ++++++++++++++++++
>  3 files changed, 121 insertions(+), 2 deletions(-)
>  create mode 100644 arch/arm64/boot/dts/altera/socfpga_stratix10_swvp.dts
> 
> diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
> index de9a18d3026f..48abe5dafaae 100644
> --- a/arch/arm64/Kconfig.platforms
> +++ b/arch/arm64/Kconfig.platforms
> @@ -249,7 +249,8 @@ config ARCH_INTEL_SOCFPGA
>  	bool "Intel's SoCFPGA ARMv8 Families"
>  	help
>  	  This enables support for Intel's SoCFPGA ARMv8 families:
> -	  Stratix 10 (ex. Altera), Agilex and eASIC N5X.
> +	  Stratix 10 (ex. Altera), Stratix10 Software Virtual Platform,
> +	  Agilex and eASIC N5X.
>  
>  config ARCH_SYNQUACER
>  	bool "Socionext SynQuacer SoC Family"
> diff --git a/arch/arm64/boot/dts/altera/Makefile b/arch/arm64/boot/dts/altera/Makefile
> index 4db83fbeb115..1bf0c472f6b4 100644
> --- a/arch/arm64/boot/dts/altera/Makefile
> +++ b/arch/arm64/boot/dts/altera/Makefile
> @@ -1,3 +1,4 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  dtb-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga_stratix10_socdk.dtb \
> -				socfpga_stratix10_socdk_nand.dtb
> +				socfpga_stratix10_socdk_nand.dtb \
> +				socfpga_stratix10_swvp.dtb
> diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_swvp.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_swvp.dts
> new file mode 100644
> index 000000000000..93fa5091a6c3
> --- /dev/null
> +++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_swvp.dts
> @@ -0,0 +1,117 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2022, Intel Corporation
> + */
> +
> +#include "socfpga_stratix10.dtsi"
> +
> +/ {
> +	model = "SOCFPGA Stratix 10 SWVP";
> +	compatible = "altr,socfpga-stratix10";

You cannot use someone else's compatible. You need your own and then
also you need to document it. Check existing sources for examples.

Documentation/devicetree/bindings/arm/altera.yaml

> +
> +	aliases {
> +		serial0 = &uart0;
> +		serial1 = &uart1;
> +
> +		timer0 = &timer0;
> +		timer1 = &timer1;
> +		timer2 = &timer2;
> +		timer3 = &timer3;
> +
> +		ethernet0 = &gmac0;
> +		ethernet1 = &gmac1;
> +		ethernet2 = &gmac2;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial1:115200n8";
> +		linux,initrd-start = <0x10000000>;
> +		linux,initrd-end = <0x125c8324>;

Best regards,
Krzysztof