20260904实测给飞凌OK3576-C开发板刷入Rockchip原厂的IMG固件【使用飞凌的DTS】切换串口波特率为1.5Mbps
2026/9/4 18:36
1、在DTS中查找115200配置的地方。很容易找到rk3576-android.dtsi这个文件！
rootroot@rootroot-HP-245-14-inch-G10-Notebook-PC:~/RK3576_Android14.0_SDK_RELEASE$
rootroot@rootroot-HP-245-14-inch-G10-Notebook-PC:~/RK3576_Android14.0_SDK_RELEASE/device/rockchip/rk3576$ grep rk3576-evb1-v10 . -R
Y:\RK3576_Android14.0_SDK_RELEASE\kernel-6.1\arch\arm64\boot\dts\rockchip\rk3576.dtsi
rootroot@rootroot-HP-245-14-inch-G10-Notebook-PC:~/RK3576_Android14.0_SDK_RELEASE/kernel-6.1/arch/arm64/boot/dts/rockchip$ grep 115200 . -R
2、将飞凌的DTS和Rockchip原厂的DTS的EVB1方案的rk3576-android.dtsi进行对比，很容易知道115200bps在哪里配置的！
Y:\RK3576_Android14.0_SDK_RELEASE\kernel-6.1\arch\arm64\boot\dts\rockchip原始精简\rk3576-android.dtsi
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (c) 2024 Rockchip Electronics Co., Ltd.
*
*/
/ {
chosen: chosen {
bootargs = "earlycon=uart8250,mmio32,0x2ad40000 console=ttyFIQ0 rcupdate.rcu_expedited=1 rcu_nocbs=all";
};
fiq_debugger: fiq-debugger {
compatible = "rockchip,fiq-debugger";
rockchip,serial-id = <0>;
rockchip,wake-irq = <0>;
/* If enable uart uses irq instead of fiq */
rockchip,irq-mode-enable = <1>;
rockchip,baudrate = <1500000>; /* Only 115200 and 1500000 */
interrupts = <GIC_SPI 389 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&uart0m0_xfer>;
status = "okay";
};
Y:\RK3576_Android14.0_SDK_RELEASE\kernel-6.1\arch\arm64\boot\dts\rockchip\rk3576-android.dtsi
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (c) 2024 Rockchip Electronics Co., Ltd.
*
*/
/ {
chosen: chosen {
bootargs = "earlycon=uart8250,mmio32,0x2ad40000 console=ttyFIQ0 rcupdate.rcu_expedited=1 rcu_nocbs=all";
};
fiq_debugger: fiq-debugger {
compatible = "rockchip,fiq-debugger";
rockchip,serial-id = <0>;
rockchip,wake-irq = <0>;
/* If enable uart uses irq instead of fiq */
rockchip,irq-mode-enable = <1>;
rockchip,baudrate = <115200>; /* Only 115200 and 1500000 */
interrupts = <GIC_SPI 389 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&uart0m0_xfer>;
status = "okay";
};
修改为：
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (c) 2024 Rockchip Electronics Co., Ltd.
*
*/
/ {
chosen: chosen {
bootargs = "earlycon=uart8250,mmio32,0x2ad40000 console=ttyFIQ0 rcupdate.rcu_expedited=1 rcu_nocbs=all";
};
fiq_debugger: fiq-debugger {
compatible = "rockchip,fiq-debugger";
rockchip,serial-id = <0>;
rockchip,wake-irq = <0>;
/* If enable uart uses irq instead of fiq */
rockchip,irq-mode-enable = <1>;
//rockchip,baudrate = <115200>; /* Only 115200 and 1500000 */
rockchip,baudrate = <1500000>; /* Only 115200 and 1500000 */
interrupts = <GIC_SPI 389 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&uart0m0_xfer>;
status = "okay";
};
3、编译完成之后可以知道串口打印全程都是1.5Mbps了！
rootroot@rootroot-HP-245-14-inch-G10-Notebook-PC:~/RK3576_Android14.0_SDK_RELEASE$ source build/envsetup.sh
rootroot@rootroot-HP-245-14-inch-G10-Notebook-PC:~/RK3576_Android14.0_SDK_RELEASE$ lunch
- rk3576_u-userdebug
Pick from common choices above (e.g. 13) or specify your own (e.g. aosp_barbet-eng): 8
rootroot@rootroot-HP-245-14-inch-G10-Notebook-PC:~/RK3576_Android14.0_SDK_RELEASE$ ./build.sh -Ku
