How to enable sdmmc3 on tx1?

how to modify dts to enable sdmmc3 on tx1? my L4T version is R28.2

hello gszqy,

you could simply change the node status to ‘okay’ and update the DTB to enable sdmmc3.
you’re able to verify by checking debug-fs. thanks

ls /sys/kernel/debug/clk/sdmmc*

thanks for your reply.
i already change the dts and rebuild dtb and copy dtb to kernel/dtb,but when i use sudo ./flash -r -k DTB jetson-tx1 mmcblk0p1, i found the new dtb is not be updated, why?

hello gszqy,

there’s known issue for R28.2/TX1 that flashing DTB partition did not work.
please refer to this topic for workarounds,

wow,dtb works! thanks very much!