linux-kernel - Re: [PATCH v1] ARM: dts: stm32: Add coprocessor detach mbox on stm32mp15xx-osd32 SoM

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Date:   Mon, 20 Mar 2023 10:20:28 +0100
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Leonard Göhrs <l.goehrs@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1] ARM: dts: stm32: Add coprocessor detach mbox on
 stm32mp15xx-osd32 SoM

On 10.03.23 10:26, Leonard Göhrs wrote:
> To support the detach feature, add a new mailbox channel to inform
> the remote processor on a detach. This signal allows the remote processor
> firmware to stop IPC communication and to reinitialize the resources for
> a re-attach.
> 
> See 6257dfc1c412dcdbd76ca5fa92c8444222dbe5b0 for a patch that does the
> same for stm32mp15x-dkx boards.
> 
> Signed-off-by: Leonard Göhrs <l.goehrs@...gutronix.de>

Reviewed-by: Ahmad Fatoum <a.fatoum@...gutronix.de>

Thanks,
Ahmad

> ---
>  arch/arm/boot/dts/stm32mp15xx-osd32.dtsi | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/stm32mp15xx-osd32.dtsi b/arch/arm/boot/dts/stm32mp15xx-osd32.dtsi
> index 935b7084b5a2..a43965c86fe8 100644
> --- a/arch/arm/boot/dts/stm32mp15xx-osd32.dtsi
> +++ b/arch/arm/boot/dts/stm32mp15xx-osd32.dtsi
> @@ -210,8 +210,8 @@ &ipcc {
>  &m4_rproc {
>  	memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>,
>  			<&vdev0vring1>, <&vdev0buffer>;
> -	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>;
> -	mbox-names = "vq0", "vq1", "shutdown";
> +	mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>, <&ipcc 3>;
> +	mbox-names = "vq0", "vq1", "shutdown", "detach";
>  	interrupt-parent = <&exti>;
>  	interrupts = <68 1>;
>  	status = "okay";
> 
> base-commit: fe15c26ee26efa11741a7b632e9f23b01aca4cc6

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