我们之前在R35.1上面使用32G Orin module时，通过修改bootLoader/tegra234-mb1-bct-gpio-p3701-0000-a04.dtsi文件就可以在启动boot时控制io，但在R35.3版本下同样去控制Orin 64G module boot阶段的IO却不起作用，我们同时还修改了tegra234-mb1-bct-gpio-p3701-0000.dtsi和tegra234-mb1-bct-gpio-p3767-hdmi-a03.dtsi，都无法控制io输出，请问这个版本上在哪控制？
Hi lpz_thread,
Are you using the devkit or custom board for AGX Orin?
Could you help to provide the flash log while you are using Orin 64G on R35.3.1 for further check?
What’s the use case for you to control IO during boot?
Have you tried to configure pinmux through spreasheet?
我们自己定制的板子，我发现flash时生成的tegra234-mb1-bct-pinmux-p3701-0000-a04.dtsi里的io配置未被修改，我想问的是64GB R35.3应该修改哪个文件，因为我们需要在boot阶段控制hdmi的5v en的io拉高
It is the device tree for pinmux which could be configured with spreasheet rather than the generated dtsi during flash.
Please provide the flash log of 64GB R35.3.1 to check which dtsi is in use.
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