STM32MP25x开发板Bring Up培训课程(中)

米尔电子 2025-02-20 306

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描述

米尔基于STM32MP257核心板及开发板

2.修改设备树

查看生成的Bring up工程空文件的设备树，CA35的设备树文件夹，其他的是M33核的工程资料。

我们可以看到生成的设备树文件如下：

myir@myir-vm:/mnt/hgfs/ShareWorkspace/stm32mp25x-bringup/Bringup/CA35/DeviceTree/Bringup$ tree -l.├── kernel│ ├── stm32mp257d-bringup-mx.dts│ └── stm32mp257d-bringup-mx-resmem.dtsi├── optee-os│ ├── stm32mp257d-bringup-mx.dts│ ├── stm32mp257d-bringup-mx-rcc.dtsi│ ├── stm32mp257d-bringup-mx-resmem.dtsi│ └── stm32mp257d-bringup-mx-rif.dtsi├── tf-a│ ├── stm32mp257d-bringup-mx.dts│ ├── stm32mp257d-bringup-mx-fw-config.dts│ ├── stm32mp257d-bringup-mx-rcc.dtsi│ └── stm32mp25-mx.dtsi└── u-boot├── stm32mp257d-bringup-mx.dts├── stm32mp257d-bringup-mx-resmem.dtsi└── stm32mp257d-bringup-mx-u-boot.dtsi4 directories, 13 files

以上的设备树已经配置了大部分内容的工程，但是工程是还无法全部启动，我们需要先把设备树同步到相应的BSP代码中。

stm32mp25x-BringUp-bsp.tar.gz已拷贝并解压到虚拟机：/home/myir。

注：windows和ubuntu之间目录共享

myir@myir-vm:~/stm32mp25x-BringUp-bsp$ tree -L 2.├── Bringup│ ├── Bringup.ioc│ ├── CA35│ ├── CM33│ ├── Common│ └── Drivers├── build├── FIP_artifacts│ ├── arm-trusted-firmware│ ├── fip│ ├── flash-all.sh│ ├── FlashLayout_emmc_stm32mp25x-bringup-mx.tsv│ ├── flash.sh│ ├── optee│ └── u-boot├── myir-st-optee│ ├── fiptool-stm32mp│ ├── Makefile.sdk│ ├── myir-st-external-dt│ ├── myir-st-optee│ └── README├── myir-st-tfa│ ├── fiptool-stm32mp│ ├── Makefile.sdk│ └── tf-a-myir├── myir-st-uboot│ ├── fiptool-stm32mp│ ├── Makefile.sdk│ └── u-boot-myir└── stm32mp-ddr-phy-A2022.11-r0├── README.HOW_TO.txt└── stm32mp-ddr-phy-A2022.1119 directories, 13 files

在“虚拟机设置”选项中设置完成后，启动虚拟机执行如下命令进行挂载：

myir@myir-vm# sudo vmhgfs-fuse .host:/ /mnt/hgfs -o allow_other

sudo 密码为：123456

在虚拟机的/mnt/hgfs目录下已经成功挂载上共享的目录，如未挂载上，可以重新启动下虚拟机。

/home/myir/目录为我这边虚拟机的目录，实际目录以自己本机为准。

tf-a设备树软链接：

myir@myir-vm:/mnt/hgfs/ShareWorkspace# ln -s /mnt/hgfs/ShareWorkspace/Bringup/CA35/DeviceTree/bringup/tf-a/* /home/myir/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir/fdts/

Optee-os设备树stm32mp257d-bringup-mx.dts和stm32mp257d-bringup-mx-rcc.dtsi软链接：

myir@myir-vm:/mnt/hgfs/ShareWorkspace# ln -s /mnt/hgfs/ShareWorkspace/Bringup/CA35/DeviceTree/bringup/optee-os/stm32mp257d-bringup-mx.dts /home/myir/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee/core/arch/arm/dts/root@myir-vm:/mnt/hgfs/ShareWorkspace# ln -s /mnt/hgfs/ShareWorkspace/Bringup/CA35/DeviceTree/bringup/optee-os/stm32mp257d-bringup-mx-rcc.dtsi /home/myir/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee/core/arch/arm/dts/

Optee-os设备树stm32mp257d-bringup-mx-resmem.dtsi和stm32mp257d-bringup-mx-rif.dtsi直接使用SourceCode压缩包Optee-os目录中的文件，可通过软链接或者拷贝的方式放到stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee/core/arch/arm/dts/目录下。

Uboot设备树软链接：

myir@myir-vm:/mnt/hgfs/ShareWorkspace# ln -s /mnt/hgfs/ShareWorkspace/Bringup/CA35/DeviceTree/bringup/u-boot/* /home/myir/stm32mp25x-BringUp-bsp/myir-st-uboot/u-boot-myir/arch/arm/dts/

Kernel设备树软链接：

Note：STM32CubeMX的规则是先生成Kernel的dts，然后将生成的dts文件拷贝到u-boot目录下，也就是说u-boot的设备树stm32mp257d-bringup-mx.dts是从kernel目录拷贝过来的，所以在U-Boot阶段修改设备树，添加User code时，请同步修改kernel的设备树或者将修改好的设备树拷贝到Kernel目录，防止下次使用CubeMX生成设备树的时候，u-boot部分的修改被kernel未修改的设备树覆盖。

2.1.配置和编译TF-A

需要手动添加TF-A阶段的串口配置的user code.使用文本编辑工具打开生成的打开 TF-A 设备树(Bringup\CA35\DeviceTree\Bringup\tf-a\stm32mp257d-bringup-mx.dts)

添加头文件

/* USER CODE BEGIN includes */#include "stm32mp25xf.dtsi"#include "stm32mp25-pinctrl.dtsi"/* USER CODE END includes */

在“USER CODE BEGIN root”位置添加“chosen”和“aliases”节点：

/* USER CODE BEGIN root */aliases {serial0 = &usart2;};chosen {stdout-path = "serial0:115200n8";};/* USER CODE END root */

增加PMIC配置

&i2c7{pinctrl-names = "default";pinctrl-0 = <&i2c7_pins_mx>;status = "okay";/* USER CODE BEGIN i2c7 */pmic2: stpmic@33 {compatible = "st,stpmic2";reg = <0x33>;status = "okay";regulators {compatible = "st,stpmic2-regulators";vddcpu: buck1 {regulator-name = "vddcpu";regulator-min-microvolt = <800000>;regulator-max-microvolt = <910000>;regulator-always-on;};vddcore: buck2 {regulator-name = "vddcore";regulator-min-microvolt = <820000>;regulator-max-microvolt = <820000>;regulator-always-on;};vddgpu: buck3 {regulator-name = "vddgpu";regulator-min-microvolt = <800000>;regulator-max-microvolt = <900000>;regulator-always-on;};vddio_pmic: buck4 {regulator-name = "vddio_pmic";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-always-on;};v1v8: buck5 {regulator-name = "v1v8";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-always-on;};vdd2_ddr: buck6 {regulator-name = "vdd2_ddr";regulator-min-microvolt = <1100000>;regulator-max-microvolt = <1100000>;};v3v3: buck7 {regulator-name = "v3v3";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-always-on;};vdda1v8_aon: ldo1 {regulator-name = "vdda1v8_aon";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-always-on;};vdd_emmc: ldo2 {regulator-name = "vdd_emmc";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-always-on;};vdd1_ddr: ldo3 {regulator-name = "vdd1_ddr";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-enable-ramp-delay = <1000>;};vdd3v3_usb: ldo4 {regulator-name = "vdd3v3_usb";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-always-on;};v5v_hdmi: ldo5 {regulator-name = "v5v_hdmi";regulator-min-microvolt = <2000000>;regulator-max-microvolt = <2000000>;};vdd_sdcard: ldo7 {regulator-name = "vdd_sdcard";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-always-on;};vddio_sdcard: ldo8 {regulator-name = "vddio_sdcard";st,regulator-bypass-microvolt = <3300000>;regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-always-on;};};};/* USER CODE END i2c7 */};&ddr{status = "okay";/* USER CODE BEGIN ddr */vdd1-supply = <&vdd1_ddr>;vdd2-supply = <&vdd2_ddr>;vddq-supply = <&vdd2_ddr>;/* USER CODE END ddr */};

使用文本编辑工具打开生成的打开TF-A设备树(Bringup\CA35\DeviceTree\Bringup\tf-a\stm32mp257d-bringup-mx-fw-config.dts)

本次配置不涉及防火墙内容，因此屏蔽如下内容：

/* st-mem-firewall {bl31_context: bl31-context@81ff0000 {reg = <0x0 0x81ff0000 0x0 0x10000>;st,protreg = ;};op_tee: op-tee@82000000 {reg = <0x0 0x82000000 0x0 0x2000000>;st,protreg = ;};};*/

新增如下内容：

/* USER CODE BEGIN root */dtb-registry {soc_fw-config {load-address = <0x0 0x81fc0000>;max-size = <0x40000>;};tos_fw {load-address = <0x0 0x82000000>;max-size = <0x2000000>;};};st-mem-firewall {bl31_context: bl31-context@81fc0000 {reg = <0x0 0x81fc0000 0x0 0x40000>;st,protreg = ;};op_tee: op-tee@82000000 {reg = <0x0 0x82000000 0x0 0x2000000>;st,protreg = ;};};/* USER CODE END root */

以上已完成配置，就可以进行TF-A的单独编译。

myir@myir-vm: cd /home/myir/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myirmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir$ source /opt/st/myd-ld25x/4.2.4-snapshot/environment-setup-cortexa35-ostl-linuxmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir$ export FIP_DEPLOYDIR_ROOT=../../FIP_artifactsmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir$ export FWDDR_DIR=../../stm32mp-ddr-phy-A2022.11-r0/stm32mp-ddr-phy-A2022.11myir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir$ make -f $PWD/../Makefile.sdk DEPLOYDIR=$FIP_DEPLOYDIR_ROOT/arm-trusted-firmware TF_A_CONFIG="optee-emmc usb" TF_A_DEVICETREE=stm32mp257d-bringup-mx ELF_DEBUG_ENABLE='1' stm32 metadata

注：已将上述TF-A单独编译的命令存放在/home/myir/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir/build.sh

编译完成：

2.2.配置与编译Optee-OS

现在进行OP-TEE的配置编译，首先需要在设备树中添加串口UART以及PWR相关的配置：

串口部分配置：

在之前STM32CubeMX配置串口的过程中，UART的配置是没办法在OP-TEE中使能的，也就是说OP-TEE的设备树中没有任何关于串口的配置，包括UART节点以及引脚，这些都需要我们手动添加上去：

(Bringup\CA35\DeviceTree\Bringup\optee-os\stm32mp257d-bringup-mx.dts)

/* USER CODE BEGIN includes */#include "stm32mp25-pinctrl.dtsi"#include #include #include #include #include #include "stm32mp25xf.dtsi"/* USER CODE END includes */

/* USER CODE BEGIN root */aliases {serial0 = &usart2;};chosen {stdout-path = "serial0:115200n8";};
shadow-prov { compatible = "st,provisioning"; hconf1_prov { nvmem-cells = <&hconf1_otp>; st,shadow-value = <0x00008DB6>; };};

/* USER CODE END root */&rcc{status = "okay";/* USER CODE BEGIN rcc */st,c1msrd = <2>;st,clk_opp {st,ck_cpu1 {cfg_1 {hz = <1000000000>;st,clksrc = <0>;st,pll = <&pll1_cfg_1000Mhz>;};cfg_2 {hz = <600000000>;st,clksrc = <0>;st,pll = <&pll2_cfg_600Mhz>;};};};/* USER CODE END rcc */};

添加pin脚定义

/* USER CODE BEGIN addons */&usart2 {pinctrl-names = "default";pinctrl-0 = <&usart2_pins_a>;status = "okay";};/* USER CODE BEGIN addons */

使用是PMIC，那么VDD_CPU的配置需要包含在PMIC中，所以同样的建议copy tf-a里的配置，增加到I2C7的设备树里。

&i2c7{status = "okay";/* USER CODE BEGIN i2c7 */pinctrl-names = "default", "sleep";pinctrl-0 = <&i2c7_pins_a>;pinctrl-1 = <&i2c7_sleep_pins_a>;

i2c-scl-rising-time-ns = <185>;i2c-scl-falling-time-ns = <20>;clock-frequency = <400000>;#address-cells = <1>;#size-cells = <0>;pmic2: stpmic2@33 {compatible = "st,stpmic2";reg = <0x33>;st,wakeup-pin-number = <1>;st,pmic-it-id = ;st,notif-it-id = <0 1>;

status = "okay"; regulators {compatible = "st,stpmic2-regulators";ldo1-supply = <&vddio_pmic>;vddcpu: buck1 {regulator-name = "vddcpu";regulator-min-microvolt = <800000>;regulator-max-microvolt = <910000>;regulator-always-on;st,pwrctrl-sel = <2>;

st,pwrctrl-enable;default {regulator-off-in-suspend;};lplv {regulator-off-in-suspend;};standby {regulator-off-in-suspend;};

off {regulator-off-in-suspend;};};vddcore: buck2 {regulator-name = "vddcore";regulator-min-microvolt = <820000>;regulator-max-microvolt = <820000>;regulator-always-on;st,pwrctrl-sel = <1>;

st,pwrctrl-enable;default {regulator-on-in-suspend;regulator-suspend-microvolt = <820000>;};lplv {regulator-on-in-suspend;regulator-suspend-microvolt = <670000>;};

standby {regulator-off-in-suspend;};off {regulator-off-in-suspend;};};

vddgpu_pmic: buck3 {regulator-name = "vddgpu_pmic";regulator-min-microvolt = <800000>;regulator-max-microvolt = <900000>;regulator-over-current-protection;};vddio_pmic: buck4 {regulator-name = "vddio_pmic";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;

regulator-always-on;st,mask-reset;st,pwrctrl-sel = <1>;st,pwrctrl-enable;default {regulator-on-in-suspend;regulator-suspend-microvolt = <3300000>;};lplv {regulator-on-in-suspend;regulator-suspend-microvolt = <3300000>;};standby {regulator-on-in-suspend;regulator-suspend-microvolt = <3300000>;};

off {/* ToDo: switch to LP */regulator-on-in-suspend;regulator-suspend-microvolt = <3300000>;};};v1v8: buck5 {regulator-name = "v1v8";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-always-on;st,pwrctrl-sel = <1>;st,pwrctrl-enable;default {regulator-on-in-suspend;regulator-suspend-microvolt = <1800000>;};lplv {regulator-on-in-suspend;regulator-suspend-microvolt = <1800000>;};standby {regulator-off-in-suspend;};off {regulator-off-in-suspend;};};

vdd2_ddr: buck6 {regulator-name = "vdd2_ddr";regulator-min-microvolt = <1100000>;regulator-max-microvolt = <1100000>;regulator-always-on;//regulator-pull-down;st,pwrctrl-sel = <1>;st,pwrctrl-enable;default {regulator-on-in-suspend;regulator-suspend-microvolt = <1100000>;};lplv {regulator-on-in-suspend;regulator-suspend-microvolt = <1100000>;};standby {regulator-on-in-suspend;regulator-suspend-microvolt = <1100000>;};off {regulator-off-in-suspend;};};v3v3: buck7 {regulator-name = "v3v3";regulator-min-microvolt = <3300000>;

regulator-max-microvolt = <3300000>;regulator-always-on;regulator-over-current-protection;st,pwrctrl-sel = <1>;st,pwrctrl-enable;default {regulator-on-in-suspend;regulator-suspend-microvolt = <3300000>;};

lplv {regulator-on-in-suspend;regulator-suspend-microvolt = <3300000>;};standby {regulator-off-in-suspend;};off {regulator-off-in-suspend;};};vdda1v8_aon: ldo1 {regulator-name = "vdda1v8_aon";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-always-on;st,alternate-input-source;st,mask-reset;};vdd_emmc: ldo2 {regulator-name = "vdd_emmc";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-over-current-protection;st,pwrctrl-sel = <3>;st,pwrctrl-reset;};vdd1_ddr: ldo3 {regulator-name = "vdd1_ddr";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-always-on;st,pwrctrl-sel = <1>;st,pwrctrl-enable;default {regulator-on-in-suspend;regulator-suspend-microvolt = <1800000>;};lplv {regulator-on-in-suspend;regulator-suspend-microvolt = <1800000>;};

standby {regulator-on-in-suspend;regulator-suspend-microvolt = <1800000>;};off {regulator-off-in-suspend;};};

vdd3v3_usb: ldo4 {regulator-name = "vdd3v3_usb";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-always-on;regulator-over-current-protection;};v5v_hdmi: ldo5 {regulator-name = "v5v_hdmi";regulator-min-microvolt = <5000000>;regulator-max-microvolt = <5000000>;st,regulator-bypass-microvolt = <5000000>;st,pwrctrl-sel = <0>;st,pwrctrl-enable;};

v5v_vconn: ldo6 {regulator-name = "v5v_vconn";regulator-min-microvolt = <5000000>;regulator-max-microvolt = <5000000>;regulator-always-on;st,regulator-bypass-microvolt = <5000000>;st,pwrctrl-sel = <0>;st,pwrctrl-reset;};vdd_sdcard: ldo7 {regulator-name = "vdd_sdcard";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-over-current-protection;st,regulator-bypass-microvolt = <3300000>;st,pwrctrl-sel = <3>;st,pwrctrl-reset;};vddio_sdcard: ldo8 {regulator-name = "vddio_sdcard";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-over-current-protection;st,regulator-bypass-microvolt = <3300000>;st,pwrctrl-sel = <3>;

st,pwrctrl-reset;};vref_ddr: refddr {regulator-name = "vref_ddr";regulator-always-on;st,pwrctrl-sel = <1>;st,pwrctrl-enable;default {regulator-on-in-suspend;};lplv {regulator-on-in-suspend;};standby {regulator-on-in-suspend;};off {regulator-off-in-suspend;};};};};};/* USER CODE END i2c7 */};

增加CPU电源配置

/* USER CODE BEGIN addons */&pwr {pinctrl-names = "default";pinctrl-0 = <&wakeup_pins>;status = "okay";vdd33ucpd: vdd33ucpd {status = "okay";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;vdd33ucpd-supply = <&vdd3v3_usb>;regulator-always-on;};vdda18adc: vdda18adc {status = "okay";regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;vdda18adc-supply = <&v1v8>;regulator-always-on;};vddgpu: vddgpu {status = "okay";vddgpu-supply = <&vddgpu_pmic>;};vddio1: vddio1 {status = "okay";regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;vddio1-supply = <&vddio_sdcard>;};vddio2: vddio2 {status = "okay";vddio2-supply = <&v1v8>;regulator-always-on;};vddio3: vddio3 {status = "okay";vddio3-supply = <&vddio_pmic>;regulator-always-on;};vddio4: vddio4 {status = "okay";vddio4-supply = <&vddio_pmic>;regulator-always-on;};vddio: vddio {status = "okay";vdd-supply = <&vddio_pmic>;};};&cpu0 {cpu-supply = <&vddcpu>;};&scmi_regu {scmi_vddcore: voltd-vddcore {reg = ;voltd-supply = <&vddcore>;};scmi_v1v8: voltd-v1v8 {reg = ;voltd-supply = <&v1v8>;};scmi_v3v3: voltd-v3v3 {reg = ;voltd-supply = <&v3v3>;};scmi_vdd_emmc: voltd-vdd-emmc {reg = ;voltd-supply = <&vdd_emmc>;};scmi_vdd3v3_usb: voltd-vdd3v3-usb {reg = ;voltd-supply = <&vdd3v3_usb>;};scmi_vdd_sdcard: voltd-vdd_sdcard {reg = ;voltd-supply = <&vdd_sdcard>;};};/* USER CODE END addons */

/* USER CODE BEGIN addons */&risaf2 {status = "disabled";};&risaf5 {status = "disabled";};&rtc {status = "okay";};&tamp {wakeup-source;wakeup-parent = <&exti2>;st,tamp-passive-precharge = <2>;st,tamp-passive-nb-sample = <4>;st,tamp-passive-sample-clk-div = <16384>;/* Tamper button */tamp_button: tamp-passive@1 {status = "disabled";reg = ;pinctrl-0 = <&tamp_in1_pin_a>;st,tamp-mode = ;};};/* USER CODE END addons */

在上一章节中提到stm32mp257d-bringup-mx-resmem.dtsi和stm32mp257d-bringup-mx-rif.dtsi直接使用SourceCode压缩包Optee-os目录中的文件，如果还未拷贝，需要将其通过软链接或者拷贝的方式放到stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee/core/arch/arm/dts/目录下。

编译Optee

myir@myir-vm: cd /home/myir/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-opteemyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee$ source /opt/st/myd-ld25x/4.2.4-snapshot/environment-setup-cortexa35-ostl-linuxmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee$ export FIP_DEPLOYDIR_ROOT=../../FIP_artifactsmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee$ export FWDDR_DIR=../../stm32mp-ddr-phy-A2022.11-r0/stm32mp-ddr-phy-A2022.11myir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee$ make -f $PWD/../Makefile.sdk DEPLOYDIR=$FIP_DEPLOYDIR_ROOT/optee CFG_EMBED_DTB_SOURCE_FILE=stm32mp257d-bringup-mx optee

注：已将上述Optee单独编译的命令存放在/home/myir/stm32mp25x-BringUp-bsp/myir-st-optee/myir-st-optee/build.sh

可以看到已经生成了bin文件

STM32

2.3.配置和编译Uboot

已同样的方式进行手动添加uboot的设备树的一些配置，使用编辑工具打开uboot下的(Bringup\CA35\DeviceTree\Bringup\u-boot\stm32mp257d-bringup-mx.dts)

/* USER CODE BEGIN root */aliases {serial0 = &usart2;};chosen {stdout-path = "serial0:115200n8";};/* USER CODE END root */

需要增加eMMC的配置

&sdmmc2{pinctrl-names = "default", "opendrain", "sleep";pinctrl-0 = <&sdmmc2_pins_mx>;pinctrl-1 = <&sdmmc2_opendrain_pins_mx>;pinctrl-2 = <&sdmmc2_sleep_pins_mx>;status = "okay"; /* USER CODE BEGIN sdmmc2 */non-removable;no-sd;no-sdio;st,neg-edge;bus-width = <8>;vmmc-supply = <&scmi_vdd_emmc>;vqmmc-supply = <&scmi_vddio2>;mmc-ddr-1_8v;mmc-hs200-1_8v; /* USER CODE END sdmmc2 */};

添加USB配置，后续用于刷机

/* USER CODE BEGIN addons */&usb2_phy1{status = "okay";/* USER CODE BEGIN usb2_phy1 */vdd33-supply = <&scmi_vdd3v3_usb>;/* USER CODE END usb2_phy1 */};&usb2_phy2{status = "okay";/* USER CODE BEGIN usb2_phy2 */vdd33-supply = <&scmi_vdd3v3_usb>;/* USER CODE END usb2_phy2 */};&usb3dr{status = "okay";/* USER CODE BEGIN usb3dr */dwc3: usb@48300000 {maximum-speed = "high-speed";usb-role-switch;port {dwc3_ep: endpoint {remote-endpoint = <&typec_ep>;};};};/* USER CODE END usb3dr */};&usbh{status = "okay";/* USER CODE BEGIN usbh */usbh_ehci: usb@482f0000 {#address-cells = <1>;#size-cells = <0>;/* onboard HUB */hub@1 {compatible = "usb424,2514";reg = <1>;vdd-supply = <&scmi_v3v3>;};};usbh_ohci: usb@482e0000 {status = "disabled";};/* USER CODE END usbh */};&scmi_regu {scmi_vddio1: regulator@0 {regulator-min-microvolt = <1800000>;regulator-max-microvolt = <3300000>;};scmi_vddcore: regulator@11 {reg = ;regulator-name = "vddcore";};scmi_v1v8: regulator@14 {reg = ;regulator-name = "v1v8";};scmi_v3v3: regulator@16 {reg = ;regulator-name = "v3v3";};scmi_vdd_emmc: regulator@18 {reg = ;regulator-name = "vdd_emmc";};scmi_vdd3v3_usb: regulator@20 {reg = ;regulator-name = "vdd3v3_usb";};scmi_vdd_sdcard: regulator@23 {reg = ;regulator-name = "vdd_sdcard";};};&mlahb {intc_rpmsg: interrupt-controller@1 {compatible = "rpmsg,intc";reg = <1 0>;#interrupt-cells = <1>;interrupt-controller;};i2c_rpmsg: i2c@2 {compatible = "rpmsg,i2c-controller";reg = <2 0>;rpmsg,dev-id = "rpmsg_i2c";#address-cells = <1>;#size-cells = <0>;status = "okay";typec@35 {compatible = "st,stm32mp25-typec";reg = <0x35>;interrupts-extended = <&intc_rpmsg 0>;status = "okay";connector {compatible = "usb-c-connector";label = "USB-C";port {typec_ep: endpoint {remote-endpoint = <&dwc3_ep>;};};};};};};/* USER CODE END addons */

使用编辑工具打开uboot下的(Bringup\CA35\DeviceTree\Bringup\u-boot\stm32mp257d-bringup-mx-u-boot.dtsi)

/* USER CODE BEGIN addons */&dwc3 {dr_mode = "peripheral";/delete-node/ port;};&i2c_rpmsg {/delete-node/ typec@35;};&usart2 {u-boot,dm-pre-reloc;};&usart2_pins_mx {u-boot,dm-pre-reloc;pins1 {u-boot,dm-pre-reloc;};pins2 {u-boot,dm-pre-reloc;};};/* USER CODE END addons */

PMIC配置与tf-a一样，这里略写。

修改完成后，编译U-Boot

myir@myir-vm:~$ cd stm32mp25x-BringUp-bsp/myir-st-uboot/u-boot-myirmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-uboot/u-boot-myir$ source /opt/st/myd-ld25x/4.2.4-snapshot/environment-setup-cortexa35-ostl-linuxmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-uboot/u-boot-myir$ export FIP_DEPLOYDIR_ROOT=../../FIP_artifactsmyir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-uboot/u-boot-myir$ export FWDDR_DIR=../../stm32mp-ddr-phy-A2022.11-r0/stm32mp-ddr-phy-A2022.11myir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-uboot/u-boot-myir$ make -f $PWD/../Makefile.sdk DEPLOYDIR=../../FIP_artifacts/u-boot UBOOT_CONFIG=default UBOOT_DEFCONFIG=stm32mp25_defconfig UBOOT_BINARY=u-boot.dtb DEVICETREE=stm32mp257d-bringup-mx FIP_CONFIG="optee-emmc" all

注：已将上述uboot单独编译的命令存放在/home/myir/stm32mp25x-BringUp-bsp/myir-st-uboot/u-boot-myir/build.sh

编译完成后生成fip文件在定义的FIP_artifacts文件夹下，如下图所示：

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