Helo Gabriel,

On 03.03.22 14:09, Gabriel FERNANDEZ wrote:

On 2/25/22 16:13, Ahmad Fatoum wrote:

quoted

Hello Gabriel,

On 25.02.22 14:31, gabriel.fernandez@foss.st.com wrote:

quoted

From: Gabriel Fernandez <redacted>
+    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 (local)

I've found that thread in the meantime and got some clarification on why a new
transport for OP-TEE was added. One question I still have though is why make
this transport the default for STM32MP13x instead of using SCMI over SMC like
you do for STM32MP15x. OP-TEE could still be made to service SCMI over SMC
and it would allow people employing TF-A as SCMI provider an easier migration
to the newer SoC.

Cheers,
Ahmad

quoted

quoted

+            #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>;

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