linux-kernel - Re: [PATCH 07/10] arm64: dts: st: add RIFSC as a domain controller for STM32MP25x boards

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Date:   Thu, 6 Jul 2023 11:25:18 +0200
From:   Alexandre TORGUE <alexandre.torgue@...s.st.com>
To:     Gatien Chevallier <gatien.chevallier@...s.st.com>,
        <Oleksii_Moisieiev@...m.com>, <gregkh@...uxfoundation.org>,
        <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <vkoul@...nel.org>, <jic23@...nel.org>,
        <olivier.moysan@...s.st.com>, <arnaud.pouliquen@...s.st.com>,
        <mchehab@...nel.org>, <fabrice.gasnier@...s.st.com>,
        <andi.shyti@...nel.org>, <ulf.hansson@...aro.org>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <hugues.fruchet@...s.st.com>, <lee@...nel.org>, <will@...nel.org>,
        <catalin.marinas@....com>, <arnd@...nel.org>,
        <richardcochran@...il.com>
CC:     <linux-crypto@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <dmaengine@...r.kernel.org>,
        <linux-i2c@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        <alsa-devel@...a-project.org>, <linux-media@...r.kernel.org>,
        <linux-mmc@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <linux-serial@...r.kernel.org>,
        <linux-spi@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH 07/10] arm64: dts: st: add RIFSC as a domain controller
 for STM32MP25x boards

Hi Gatien

On 7/5/23 19:27, Gatien Chevallier wrote:
> RIFSC is a firewall controller. Change its compatible so that is matches
> the documentation and reference RIFSC as a feature-domain-controller.
> 
> Signed-off-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
> ---
>   arch/arm64/boot/dts/st/stm32mp251.dtsi | 5 ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> index 5268a4321841..62101084cab8 100644
> --- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
> +++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> @@ -106,17 +106,20 @@ soc@0 {
>   		ranges = <0x0 0x0 0x0 0x80000000>;
>   
>   		rifsc: rifsc-bus@...80000 {
> -			compatible = "simple-bus";
> +			compatible = "st,stm32mp25-rifsc";

You could keep "simple-bus" compatible (in second position). In case of 
the RIFSC is not probed, the platform will be able to boot. If you agree 
you can use the same for ETZPC.

Cheers
Alex

>   			reg = <0x42080000 0x1000>;
>   			#address-cells = <1>;
>   			#size-cells = <1>;
>   			ranges;
> +			feature-domain-controller;
> +			#feature-domain-cells = <1>;
>   
>   			usart2: serial@...e0000 {
>   				compatible = "st,stm32h7-uart";
>   				reg = <0x400e0000 0x400>;
>   				interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
>   				clocks = <&ck_flexgen_08>;
> +				feature-domains = <&rifsc 32>;
>   				status = "disabled";
>   			};
>   		};