It seems that the DTB file has changed a lot in the 20.04 ubuntu image. I can only find uart3-m1-xfer instead of the needed uart3-m2-xfer in DTS file converted from rk3588s-cp4.dtb. What should I do in order to use uart3 under this circumstance?
uart2 {
uart2m0-xfer {
rockchip,pins = <0x00 0x0e 0x0a 0x167 0x00 0x0d 0x0a 0x167>;
phandle = <0x136>;
};
};
uart3 {
uart3m1-xfer {
rockchip,pins = <0x03 0x0e 0x0a 0x167 0x03 0x0d 0x0a 0x167>;
phandle = <0x137>;
};
};
uart4 {
uart4m1-xfer {
rockchip,pins = <0x03 0x18 0x0a 0x167 0x03 0x19 0x0a 0x167>;
phandle = <0x138>;
};
};
uart5 {
uart5m1-xfer {
rockchip,pins = <0x03 0x15 0x0a 0x167 0x03 0x14 0x0a 0x167>;
phandle = <0x139>;
};
};