Re: [PATCH v21 0/6] Introduction of a remoteproc tee to load signed firmware

On Tue, Mar 17, 2026 at 07:03:21PM +0100, Arnaud Pouliquen wrote:

Main updates from version V20[4]:

To address Rob’s concern on v20concerning resource declaration under the tee node, the device tree is now structured as follows,replacing the child-parent hierarchy with a phandle:

firmware {
    tee_rproc: optee-rproc {
        compatible = "80a4c275-0a47-4905-8285-1486a9771a08";
    };
};

And what is the parent here?

m4: m4@0 {

What sort of bus do you have here (IOW, what does this 0 mean?)

  compatible = "st,stm32mp1-m4-tee";
  reg = <0 0>;

  mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>;
  mbox-names = "vq0", "vq1", "shutdown";

  memory-region = <&vdev0vring0>, <&m_ipc_shm>, <&mcuram2>,
                  <&vdev0vring1>, <&vdev0buffer>, <&retram>;

  interrupt-parent = <&exti>;
  interrupts = <68 1>;

  rproc-tee-phandle = <&tee_rproc 0>;
  st,auto-boot;
  wakeup-source;

  status = "okay";
};

Best regards, Krzysztof