ARM: dts: stm32: add SCMI version of STM32 boards (DK1/DK2/ED1/EV1)

Add a "secure" version of STM32 boards based on SCMI when RCC_TZCR.TZEN=1.

Only boards provided by STMicroelectronics are concerned:
-STM32MP157A-DK1
-STM32MP157C-DK2
-STM32MP157C-ED1
-STM32MP157C-EV1

The resources secured by RCC_TZCR.TZEN=1 are managed by OP-TEE
and the associated SCMI services, reset and clock.

These device trees are only supported with stm32mp15_defconfig,
with OP-TEE, SCMI and without SPL support.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

arch/arm/dts/Makefile

@@ -1171,13 +1171,17 @@ dtb-$(CONFIG_STM32MP13x) += \
 
 dtb-$(CONFIG_STM32MP15x) += \
 	stm32mp157a-dk1.dtb \
+	stm32mp157a-dk1-scmi.dtb \
 	stm32mp157a-icore-stm32mp1-ctouch2.dtb \
 	stm32mp157a-icore-stm32mp1-edimm2.2.dtb \
 	stm32mp157a-microgea-stm32mp1-microdev2.0.dtb \
 	stm32mp157a-microgea-stm32mp1-microdev2.0-of7.dtb \
 	stm32mp157c-dk2.dtb \
+	stm32mp157c-dk2-scmi.dtb \
 	stm32mp157c-ed1.dtb \
+	stm32mp157c-ed1-scmi.dtb \
 	stm32mp157c-ev1.dtb \
+	stm32mp157c-ev1-scmi.dtb \
 	stm32mp157c-odyssey.dtb \
 	stm32mp15xx-dhcom-drc02.dtb \
 	stm32mp15xx-dhcom-pdk2.dtb \

arch/arm/dts/stm32mp15-scmi-u-boot.dtsi

@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause)
+/*
+ * Copyright (C) STMicroelectronics 2022 - All Rights Reserved
+ */
+
+/ {
+	aliases {
+		gpio0 = &gpioa;
+		gpio1 = &gpiob;
+		gpio2 = &gpioc;
+		gpio3 = &gpiod;
+		gpio4 = &gpioe;
+		gpio5 = &gpiof;
+		gpio6 = &gpiog;
+		gpio7 = &gpioh;
+		gpio8 = &gpioi;
+		gpio9 = &gpioj;
+		gpio10 = &gpiok;
+		gpio25 = &gpioz;
+		pinctrl0 = &pinctrl;
+		pinctrl1 = &pinctrl_z;
+	};
+
+	binman: binman {
+		multiple-images;
+	};
+
+	soc {
+		u-boot,dm-pre-reloc;
+
+		ddr: ddr@5a003000 {
+			u-boot,dm-pre-reloc;
+
+			compatible = "st,stm32mp1-ddr";
+
+			reg = <0x5a003000 0x550
+			       0x5a004000 0x234>;
+
+			status = "okay";
+		};
+	};
+
+	/* need PSCI for sysreset during board_f */
+	psci {
+		u-boot,dm-pre-proper;
+	};
+};
+
+&bsec {
+	u-boot,dm-pre-reloc;
+};
+
+&gpioa {
+	u-boot,dm-pre-reloc;
+};
+
+&gpiob {
+	u-boot,dm-pre-reloc;
+};
+
+&gpioc {
+	u-boot,dm-pre-reloc;
+};
+
+&gpiod {
+	u-boot,dm-pre-reloc;
+};
+
+&gpioe {
+	u-boot,dm-pre-reloc;
+};
+
+&gpiof {
+	u-boot,dm-pre-reloc;
+};
+
+&gpiog {
+	u-boot,dm-pre-reloc;
+};
+
+&gpioh {
+	u-boot,dm-pre-reloc;
+};
+
+&gpioi {
+	u-boot,dm-pre-reloc;
+};
+
+&gpioj {
+	u-boot,dm-pre-reloc;
+};
+
+&gpiok {
+	u-boot,dm-pre-reloc;
+};
+
+&gpioz {
+	u-boot,dm-pre-reloc;
+};
+
+&optee {
+	u-boot,dm-pre-proper;
+};
+
+&iwdg2 {
+	u-boot,dm-pre-reloc;
+};
+
+/* pre-reloc probe = reserve video frame buffer in video_reserve() */
+&ltdc {
+	u-boot,dm-pre-proper;
+};
+
+/* temp = waiting kernel update */
+&m4_rproc {
+	resets = <&scmi_reset RST_SCMI_MCU>,
+		 <&scmi_reset RST_SCMI_MCU_HOLD_BOOT>;
+	reset-names = "mcu_rst", "hold_boot";
+};
+
+&pinctrl {
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl_z {
+	u-boot,dm-pre-reloc;
+};
+
+&rcc {
+	u-boot,dm-pre-reloc;
+};
+
+&scmi {
+	u-boot,dm-pre-proper;
+};
+
+&usart1 {
+	resets = <&rcc USART1_R>;
+};
+
+&usart2 {
+	resets = <&rcc USART2_R>;
+};
+
+&usart3 {
+	resets = <&rcc USART3_R>;
+};
+
+&uart4 {
+	resets = <&rcc UART4_R>;
+};
+
+&uart5 {
+	resets = <&rcc UART5_R>;
+};
+
+&usart6 {
+	resets = <&rcc USART6_R>;
+};
+
+&uart7 {
+	resets = <&rcc UART7_R>;
+};
+
+&uart8{
+	resets = <&rcc UART8_R>;
+};

arch/arm/dts/stm32mp157a-dk1-scmi-u-boot.dtsi

@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+/*
+ * Copyright : STMicroelectronics 2022
+ */
+
+#include <dt-bindings/clock/stm32mp1-clksrc.h>
+#include "stm32mp15-scmi-u-boot.dtsi"
+#include "stm32mp15-ddr3-1x4Gb-1066-binG.dtsi"
+
+/ {
+	aliases {
+		i2c3 = &i2c4;
+		usb0 = &usbotg_hs;
+	};
+
+	config {
+		u-boot,boot-led = "heartbeat";
+		u-boot,error-led = "error";
+		u-boot,mmc-env-partition = "u-boot-env";
+		st,adc_usb_pd = <&adc1 18>, <&adc1 19>;
+		st,fastboot-gpios = <&gpioa 13 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+		st,stm32prog-gpios = <&gpioa 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+	};
+
+	led {
+		red {
+			label = "error";
+			gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+			status = "okay";
+		};
+	};
+};
+
+&adc {
+	status = "okay";
+};
+
+&uart4 {
+	u-boot,dm-pre-reloc;
+};
+
+&uart4_pins_a {
+	u-boot,dm-pre-reloc;
+	pins1 {
+		u-boot,dm-pre-reloc;
+	};
+	pins2 {
+		u-boot,dm-pre-reloc;
+		/* pull-up on rx to avoid floating level */
+		bias-pull-up;
+	};
+};
+
+&usbotg_hs {
+	u-boot,force-b-session-valid;
+};

arch/arm/dts/stm32mp157c-dk2-scmi-u-boot.dtsi

@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+/*
+ * Copyright : STMicroelectronics 2022
+ */
+
+#include "stm32mp157a-dk1-scmi-u-boot.dtsi"

arch/arm/dts/stm32mp157c-ed1-scmi-u-boot.dtsi

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+/*
+ * Copyright : STMicroelectronics 2022
+ */
+
+#include <dt-bindings/clock/stm32mp1-clksrc.h>
+#include "stm32mp15-scmi-u-boot.dtsi"
+#include "stm32mp15-ddr3-2x4Gb-1066-binG.dtsi"
+
+/ {
+	aliases {
+		i2c3 = &i2c4;
+	};
+
+	config {
+		u-boot,boot-led = "heartbeat";
+		u-boot,error-led = "error";
+		u-boot,mmc-env-partition = "u-boot-env";
+		st,fastboot-gpios = <&gpioa 13 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+		st,stm32prog-gpios = <&gpioa 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+	};
+
+	led {
+		red {
+			label = "error";
+			gpios = <&gpioa 13 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+			status = "okay";
+		};
+	};
+};
+
+&uart4 {
+	u-boot,dm-pre-reloc;
+};
+
+&uart4_pins_a {
+	u-boot,dm-pre-reloc;
+	pins1 {
+		u-boot,dm-pre-reloc;
+	};
+	pins2 {
+		u-boot,dm-pre-reloc;
+		/* pull-up on rx to avoid floating level */
+		bias-pull-up;
+	};
+};

arch/arm/dts/stm32mp157c-ev1-scmi-u-boot.dtsi

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+/*
+ * Copyright : STMicroelectronics 2022
+ */
+
+#include "stm32mp157c-ed1-scmi-u-boot.dtsi"
+
+/ {
+	aliases {
+		gpio26 = &stmfx_pinctrl;
+		i2c1 = &i2c2;
+		i2c4 = &i2c5;
+		pinctrl2 = &stmfx_pinctrl;
+		spi0 = &qspi;
+		usb0 = &usbotg_hs;
+	};
+};

doc/board/st/stm32mp1.rst

@@ -77,6 +77,16 @@ Currently the following boards are supported:
  + stm32mp157c-ev1.dts
  + stm32mp15xx-dhcor-avenger96.dts
 
+The SCMI variant of each board is supported by a specific "scmi" device tree:
+ + stm32mp157a-dk1-scmi.dts
+ + stm32mp157c-dk2-scmi.dts
+ + stm32mp157c-ed1-scmi.dts
+ + stm32mp157c-ev1-scmi.dts
+
+SCMI variant is used only with stm32mp15_defconfig, when the resources are
+secured with RCC_TZCR.TZEN=1 in OP-TEE. The access to these reset and clock
+resources are provided by OP-TEE and the associated SCMI services.
+
 STM32MP13x
 ``````````
 
@@ -136,6 +146,9 @@ TF-A_ (BL2) initialize the DDR and loads the next stage binaries from a FIP file
      the secure monitor to access to secure resources.
    + HW_CONFIG: The hardware configuration file = the U-Boot device tree
 
+The scmi variant of each device tree is only support with OP-TEE as secure
+monitor, with stm32mp15_defconfig.
+
 The **Basic** boot chain with SPL (for STM32MP15x)
 ``````````````````````````````````````````````````
 
@@ -248,6 +261,12 @@ Build Procedure
 
   a) trusted boot with FIP on STM32MP15x ev1::
 
+     # export KBUILD_OUTPUT=stm32mp15
+     # make stm32mp15_defconfig
+     # make DEVICE_TREE=stm32mp157c-ev1-scmi all
+
+    or without SCMI support
+
      # export KBUILD_OUTPUT=stm32mp15
      # make stm32mp15_defconfig
      # make DEVICE_TREE=stm32mp157c-ev1 all