linux-kernel - Re: [PATCH 6/8] ARM: dts: stm32: enable optee firmware and SCMI support on STM32MP15

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Date:   Mon, 25 Apr 2022 12:25:55 +0200
From:   Marek Vasut <marex@...x.de>
To:     Etienne CARRIERE <etienne.carriere@...com>,
        Alexandre TORGUE - foss <alexandre.torgue@...s.st.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        "soc@...nel.org" <soc@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Ahmad Fatoum <a.fatoum@...gutronix.de>
Subject: Re: [PATCH 6/8] ARM: dts: stm32: enable optee firmware and SCMI
 support on STM32MP15

On 4/25/22 12:19, Etienne CARRIERE wrote:
> Hello Marek,

Hi,

>> From: Marek Vasut <marex@...x.de>
>>
>>> On 4/22/22 17:09, Alexandre Torgue wrote:
>>> Enable optee and SCMI clocks/reset protocols support.
>>>
>>> Signed-off-by: Alexandre Torgue <alexandre.torgue@...s.st.com>
>>>
>>> diff --git a/arch/arm/boot/dts/stm32mp151.dtsi
>>> b/arch/arm/boot/dts/stm32mp151.dtsi
>>> index 7fdc324b3cf9..1b2fd3426a81 100644
>>> --- a/arch/arm/boot/dts/stm32mp151.dtsi
>>> +++ b/arch/arm/boot/dts/stm32mp151.dtsi
>>> @@ -115,6 +115,33 @@
>>>                  status = "disabled";
>>>          };
>>>     
>>> +     firmware {
>>> +             optee: optee {
>>> +                     compatible = "linaro,optee-tz";
>>> +                     method = "smc";
>>> +                     status = "disabled";
>>> +             };
>>
>> Doesn't this TEE node get automatically generated and patched into DT by
>> the TEE ? I think OpTee-OS does that.
> 
> OP-TEE OS does that if it gets passed the DT from early boot stage which is not always the case.

Shouldn't that be something to fix ?

I think R-Car3 does that already.