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

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Message-ID: <6f146b61-4386-1f2f-f16b-55148b74bb6a@foss.st.com>
Date:   Tue, 16 May 2023 16:33:33 +0200
From:   Alexandre TORGUE <alexandre.torgue@...s.st.com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        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>,
        <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

Hi Mathieu

On 5/15/23 19:27, Mathieu Poirier wrote:
> 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.

I will merge DT patches in STM32 tree.

cheers
Alex

> 
> Thanks,
> Mathieu
> 
>> -- 
>> 2.25.1
>>