linux-kernel - Re: [PATCH v4 0/2] stm32mp15: update remoteproc to support SCMI Device tree

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Message-ID: <56aafce0-039e-bc5e-37e4-10b7fb4e5fdd@foss.st.com>
Date:   Wed, 17 May 2023 12:15:59 +0200
From:   Alexandre TORGUE <alexandre.torgue@...s.st.com>
To:     Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>
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>
Subject: Re: [PATCH v4 0/2] stm32mp15: update remoteproc to support SCMI
 Device tree

Hi Arnaud

On 5/17/23 09:48, Arnaud Pouliquen wrote:
> Update vs V3[1]:
> ---------------
> - remove from the V4 the commits already merged by Mathieu Poirier in the
>    remoteproc next branch:
>    - dt-bindings: remoteproc: st,stm32-rproc: Rework reset declarations
>    - remoteproc: stm32: Allow hold boot management by the SCMI reset
>      controller
> - rename patch " ARM: dts: stm32: Update reset declarations" to
>    "ARM: dts: stm32: Update Cortex-M4 reset declarations on stm32mp15"
> - Fix DTS error reported by "make dtbs_check"
> 
> [1]https://lore.kernel.org/lkml/20230512093926.661509-1-arnaud.pouliquen@foss.st.com/
> 
> 
> Description:
> -----------
> This series updates the stm32_rproc driver and associated DT node to
> support device tree configuration with and without SCMI server.
> The impact is mainly on the MCU hold boot management.
> 
> Three configurations have to be supported:
> 
> 1) Configuration without OP-TEE SCMI (legacy): Trusted context not activated
> - The MCU reset is controlled through the Linux RCC reset driver.
> - The MCU HOLD BOOT is controlled through The RCC sysconf.
> 
> 2) Configuration with SCMI server: Trusted context activated
> - The MCU reset is controlled through the SCMI reset service.
> - The MCU HOLD BOOT is no more controlled through a SMC call service but
>    through the SCMI reset service.
> 
> 3) Configuration with OP-TEE SMC call (deprecated): Trusted context activated
> - The MCU reset is controlled through the Linux RCC reset driver.
> - The MCU HOLD BOOT is controlled through The SMC call.
> 
> In consequence this series:
> - adds the use of the SCMI reset service to manage the MCU hold boot,
> - determines the configuration to use depending on the presence of the
>    "reset-names" property
>    if ( "reset-names" property contains "hold_boot")
>    then use reset_control services
>    else use regmap access based on "st,syscfg-holdboot" property.
> - set the DT st,syscfg-tz property as deprecated
> 
> 
> Arnaud Pouliquen (2):
>    ARM: dts: stm32: Update Cortex-M4 reset declarations on stm32mp15
>    ARM: dts: stm32: fix m4_rproc references to use SCMI
> 
>   arch/arm/boot/dts/stm32mp151.dtsi          | 2 +-
>   arch/arm/boot/dts/stm32mp157a-dk1-scmi.dts | 7 +++++--
>   arch/arm/boot/dts/stm32mp157c-dk2-scmi.dts | 7 +++++--
>   arch/arm/boot/dts/stm32mp157c-ed1-scmi.dts | 7 +++++--
>   arch/arm/boot/dts/stm32mp157c-ev1-scmi.dts | 7 +++++--
>   5 files changed, 21 insertions(+), 9 deletions(-)
> 

Series applied on stm32-next.

Regards
Alex