linux-kernel - Re: [Linux-stm32] [PATCH v2 12/13] ARM: dts: stm32: enable optee firmware and SCMI support on STM32MP13

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Date:   Thu, 3 Mar 2022 14:09:17 +0100
From:   Gabriel FERNANDEZ <gabriel.fernandez@...s.st.com>
To:     Ahmad Fatoum <a.fatoum@...gutronix.de>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: Re: [Linux-stm32] [PATCH v2 12/13] ARM: dts: stm32: enable optee
 firmware and SCMI support on STM32MP13


On 2/25/22 16:13, Ahmad Fatoum wrote:
> Hello Gabriel,
>
> On 25.02.22 14:31, gabriel.fernandez@...s.st.com wrote:
>> From: Gabriel Fernandez <gabriel.fernandez@...s.st.com>
>>
>> Enable optee and SCMI clocks support.
>>
>> Signed-off-by: Gabriel Fernandez <gabriel.fernandez@...s.st.com>
>> ---
>>   arch/arm/boot/dts/stm32mp131.dtsi | 37 +++++++++++++++++++++++++++++++
>>   1 file changed, 37 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/stm32mp131.dtsi b/arch/arm/boot/dts/stm32mp131.dtsi
>> index 262de4eeb4ed..78eac53224d4 100644
>> --- a/arch/arm/boot/dts/stm32mp131.dtsi
>> +++ b/arch/arm/boot/dts/stm32mp131.dtsi
>> @@ -27,6 +27,43 @@ arm-pmu {
>>   		interrupt-parent = <&intc>;
>>   	};
>>   
>> +	scmi_sram: sram@...ff000 {
>> +		compatible = "mmio-sram";
>> +		reg = <0x2ffff000 0x1000>;
>> +		#address-cells = <1>;
>> +		#size-cells = <1>;
>> +		ranges = <0 0x2ffff000 0x1000>;
>> +
>> +		scmi_shm: scmi_shm@0 {
>> +			compatible = "arm,scmi-shmem";
>> +			reg = <0 0x80>;
>> +		};
>> +	};
>> +
>> +	firmware {
>> +		optee {
>> +			method = "smc";
>> +			compatible = "linaro,optee-tz";
>> +		};
>> +
>> +		scmi: scmi {
>> +			compatible = "linaro,scmi-optee";
> This compatible doesn't seem to be documented upstream. I am looking at v5.17-rc5.
> Do you have a reference detailing the difference between this conduit and
> plain arm,scmi-smc (as used with TF-A on the STM32MP151).
>
> Cheers,
> Ahmad

Hi

Ahmad,

it's on going.

https://lore.kernel.org/linux-arm-kernel/20211029102118.GG6526@e120937-lin/T/#mf46c83f0aadce3061ee93fa22159405f38d881a0

>
>> +			#address-cells = <1>;
>> +			#size-cells = <0>;
>> +			linaro,optee-channel-id = <0>;
>> +			shmem = <&scmi_shm>;
>> +
>> +			scmi_clk: protocol@14 {
>> +				reg = <0x14>;
>> +				#clock-cells = <1>;
>> +			};
>> +
>> +			scmi_reset: protocol@16 {
>> +				reg = <0x16>;
>> +				#reset-cells = <1>;
>> +			};
>> +		};
>> +	};
>>   	clocks {
>>   		clk_axi: clk-axi {
>>   			#clock-cells = <0>;
>