[PATCH 5/6] ARM: dts: stm32mp: add dtsi for SMC SiP-based SCMI

[Ahmad Fatoum]

Upstream device trees use OP-TEE shared memory for SCMI, but upstream
OP-TEE also supports a compatibility mode to service SCMI over the
a sillicon provider secure monitor call, like what TF-A implements.

This can be enabled via including the device tree added here
and configuring OP-TEE appropriately:

  CFG_STM32MP1_SCMI_SIP=y
  CFG_STM32MP1_SCMI_SHM_SYSRAM=y

or just compiling TF-A with `AARCH32_SP=sp_min`.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 arch/arm/dts/stm32mp1-scmi-smc.dtsi | 49 +++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 arch/arm/dts/stm32mp1-scmi-smc.dtsi

diff --git a/arch/arm/dts/stm32mp1-scmi-smc.dtsi b/arch/arm/dts/stm32mp1-scmi-smc.dtsi
new file mode 100644
index 000000000000..590df657e907
--- /dev/null
+++ b/arch/arm/dts/stm32mp1-scmi-smc.dtsi
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
+
+/ {
+	firmware {
+		scmi: scmi {
+			compatible = "arm,scmi-smc";
+			shmem = <&scmi0_shm>;
+			arm,smc-id = <0x82002000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			scmi_clk: protocol at 14 {
+				reg = <0x14>;
+				#clock-cells = <1>;
+			};
+
+			scmi_reset: protocol at 16 {
+				reg = <0x16>;
+				#reset-cells = <1>;
+			};
+		};
+	};
+
+	soc {
+		sram at 2ffff000 {
+			compatible = "mmio-sram";
+			reg = <0x2ffff000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x2ffff000 0x1000>;
+
+			scmi0_shm: scmi_shm at 0 {
+				compatible = "arm,scmi-shmem";
+				reg = <0 0x80>;
+			};
+
+			scmi1_shm: scmi_shm at 200 {
+				compatible = "arm,scmi-shmem";
+				reg = <0x200 0x80>;
+			};
+		};
+	};
+};
+
+/delete-node/ &clk_hse;
+/delete-node/ &clk_hsi;
+/delete-node/ &clk_lse;
+/delete-node/ &clk_lsi;
+/delete-node/ &clk_csi;
-- 
2.39.2