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Subject: Re: [PATCH 0/2] Add new IPCC mailbox to support the coprocessor
 detach on some stm32mp15x boards
To:     Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>,
        Rob Herring <robh@kernel.org>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>
CC:     <devicetree@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-remoteproc@vger.kernel.org>, <linux-kernel@vger.kernel.org>
References: <20210614164940.27153-1-arnaud.pouliquen@foss.st.com>
From:   Alexandre TORGUE <alexandre.torgue@foss.st.com>
Message-ID: <40d3f649-f56e-15bd-f7ef-59c62028c317@foss.st.com>
Date:   Thu, 15 Jul 2021 17:16:35 +0200
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Hi Arnaud

On 6/14/21 6:49 PM, Arnaud Pouliquen wrote:
> Purpose:
>    Add the IPCC channel 4 as "detach" mailbox to support the remoteproc the feature added in [1].
> 
>    The enable of this feature is a design choice. As consequence, the new mbox is declared
>    only for stm32mp157c-ed1 & stm32mp15x-dkx boards maintained by ST Microelectronics.
> 
> Aim:
>    Allow to send to the remote processor a HW signal on IPCC channel 4 when user space requests
>    to detach the main processor from the remote processor (e.g. a reboot of the  Linux processor
>    on a crash).
> 
> [1] https://patchwork.ozlabs.org/project/devicetree-bindings/cover/20210331073347.8293-1-arnaud.pouliquen@foss.st.com/
> 
> Arnaud Pouliquen (2):
>    ARM: dts: stm32: Add coprocessor detach mbox on stm32mp157c-ed1 board
>    ARM: dts: stm32: Add coprocessor detach mbox on stm32mp15x-dkx boards
> 
>   arch/arm/boot/dts/stm32mp157c-ed1.dts  | 4 ++--
>   arch/arm/boot/dts/stm32mp15xx-dkx.dtsi | 4 ++--
>   2 files changed, 4 insertions(+), 4 deletions(-)
> 

Series Applied on stm32-next;

thanks
Alex