linux-kernel - Re: [PATCH v3 0/4] stm32mp15: update remoteproc to support SCMI Device tree

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Message-ID: <ZGJrj9Vu2H9NZdlH@p14s>
Date:   Mon, 15 May 2023 11:27:43 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        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 v3 0/4] stm32mp15: update remoteproc to support SCMI
 Device tree

On Fri, May 12, 2023 at 11:39:22AM +0200, Arnaud Pouliquen wrote:
> Update vs V2[1]:
> ---------------
> - update yaml to remove label in examples
> - fix error management for  devm_reset_control_get_optional(dev, "hold_boot")
> - rebased on commit ac9a78681b92 ("Linux 6.4-rc1")
> 
> [1]https://lore.kernel.org/lkml/20230504094641.870378-1-arnaud.pouliquen@foss.st.com/T/
> 
> 
> 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 (4):
>   dt-bindings: remoteproc: st,stm32-rproc: Rework reset declarations
>   remoteproc: stm32: Allow hold boot management by the SCMI reset
>     controller
>   ARM: dts: stm32: Update reset declarations
>   ARM: dts: stm32: fix m4_rproc references to use SCMI
> 
>  .../bindings/remoteproc/st,stm32-rproc.yaml   | 44 +++++++++--
>  arch/arm/boot/dts/stm32mp151.dtsi             |  2 +-
>  arch/arm/boot/dts/stm32mp157a-dk1-scmi.dts    |  6 +-
>  arch/arm/boot/dts/stm32mp157c-dk2-scmi.dts    |  6 +-
>  arch/arm/boot/dts/stm32mp157c-ed1-scmi.dts    |  6 +-
>  arch/arm/boot/dts/stm32mp157c-ev1-scmi.dts    |  6 +-
>  drivers/remoteproc/stm32_rproc.c              | 76 ++++++++++++++-----
>  7 files changed, 111 insertions(+), 35 deletions(-)
> 

I have applied patch 1 and 2.  Unless Alexandre wants to proceed differently,
patches 3 and 4 should go through his tree.

Thanks,
Mathieu

> -- 
> 2.25.1
>