linux-kernel - Re: [PATCH 2/3] arm64: dts: Add corstone1000 external system device node

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Message-ID: <ZesCyIpRgi1EkixF@bogus>
Date: Fri, 8 Mar 2024 12:21:28 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: abdellatif.elkhlifi@....com
Cc: Bjorn Andersson <andersson@...nel.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>,
	Sudeep Holla <sudeep.holla@....com>,
	Rob Herring <robh+dt@...nel.org>, Liviu Dudau <liviu.dudau@....com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Drew.Reed@....com,
	Adam.Johnston@....com, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-remoteproc@...r.kernel.org
Subject: Re: [PATCH 2/3] arm64: dts: Add corstone1000 external system device
 node

On Fri, Mar 01, 2024 at 04:42:26PM +0000, abdellatif.elkhlifi@....com wrote:
> From: Abdellatif El Khlifi <abdellatif.elkhlifi@....com>
> 
> add device tree node for the external system core in Corstone-1000
> 
> Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@....com>
> ---
>  arch/arm64/boot/dts/arm/corstone1000.dtsi | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/arm/corstone1000.dtsi b/arch/arm64/boot/dts/arm/corstone1000.dtsi
> index 6ad7829f9e28..67df642363e9 100644
> --- a/arch/arm64/boot/dts/arm/corstone1000.dtsi
> +++ b/arch/arm64/boot/dts/arm/corstone1000.dtsi
> @@ -1,6 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0 OR MIT
>  /*
> - * Copyright (c) 2022, Arm Limited. All rights reserved.
> + * Copyright 2022, 2024, Arm Limited and/or its affiliates <open-source-office@....com>
>   * Copyright (c) 2022, Linaro Limited. All rights reserved.
>   *
>   */
> @@ -157,5 +157,13 @@ mhu_seh1: mailbox@...30000 {
>  			secure-status = "okay";     /* secure-world-only */
>  			status = "disabled";
>  		};
> +
> +		extsys0: remoteproc@...10310 {
> +			compatible = "arm,corstone1000-extsys";
> +			reg = <0x1a010310 0x4>,
> +				<0x1a010314 0X4>;


As per [1], this is just a few registers within the 64kB block.
Not sure if it should be represented as a whole on just couple
of registers like this for reset.

-- 
Regards,
Sudeep

[1] https://developer.arm.com/documentation/101418/0100/Programmers-model/Register-descriptions/Host-Base-System-Control-register-summary