linux-kernel - [PATCH 0/2] Add new IPCC mailbox to support the coprocessor detach on some stm32mp15x boards

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Date:   Mon, 14 Jun 2021 18:49:38 +0200
From:   Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
To:     Rob Herring <robh@...nel.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
CC:     <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
Subject: [PATCH 0/2] Add new IPCC mailbox to support the coprocessor detach on some stm32mp15x boards

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(-)

-- 
2.17.1