1.概述
本文引用地址：
本文将以 MYIR 的 MYC-LD25X 核心模块及MYD-LD25X开发平台为例，讲解如何使用 STM32CubeMX 来实现Developer package最小系统和外设资源的配置。
2.修改设备树（接上一期）
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.dtsi
4 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-A2022.11
19 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
#include stm32mp25xf.dtsi
#include stm32mp25-pinctrl.dtsi
在”USER CODE BEGIN root”位置添加”chosen”和”aliases”节点：
aliases {
serial0 = usart2;
};
chosen {
stdout-path = serial0:115200n8
};
增加PMIC配置
i2c7{
pinctrl-names = default
pinctrl-0 = i2c7_pins_mx
status = okay
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;
};
};
ddr{
status = okay
vdd1-supply = vdd1_ddr
vdd2-supply = vdd2_ddr
vddq-supply = vdd2_ddr
};
使用文本编辑工具打开生成的 打开 TF-A 设备树(BringupCA35DeviceTreeBringuptf-astm32mp257d-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：
新增如下内容：
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 = ;
};
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-myir
myir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir$ source /opt/st/myd-ld25x/4.2.4-snapshot/environment-setup-cortexa35-ostl-linux
myir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir$ export FIP_DEPLOYDIR_ROOT=../../FIP_artifacts
myir@myir-vm:~/stm32mp25x-BringUp-bsp/myir-st-tfa/tf-a-myir$ export FWDDR_DIR=../../stm32mp-ddr-phy-A2022.11-r0/stm32mp-ddr-phy-A2022.11
myir@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
