I can't seem to get UART to work on Radxa Zero 3W
System info https://paste.next.armbian.com/savaleceqe
The usual enable UART options (that I see with other boards) do not show up under armbian-config->System->Kernel->Manage Device Tree Overlays. (In fact very little shows up there, all the usual SPI / i2c / w1 / usbhost etc are all missing).
I did decompile /boot/dtb/rockchip/rk3566-radxa-zero3.dtb to take a look at what in their, and UART1,2,3,4,5,6,7 along with other missing options armbian-config are their, but the references to other files look to be missing IF (and that's a big IF) I am understanding the dtb / dts correctly.
Within /boot/dtb/rockchip/rk3566-radxa-zero3.dtb with the symbols stanza I see the following
__symbols__ {
uart1 = "/serial@fe650000";
uart2 = "/serial@fe660000";
uart3 = "/serial@fe670000";
}
I'm assuming uart1 is referancing this section within the same file
serial@fe650000 {
compatible = "rockchip,rk3568-uart\0snps,dw-apb-uart";
reg = <0x00 0xfe650000 0x00 0x100>;
interrupts = <0x00 0x75 0x04>;
clocks = <0x24 0x11f 0x24 0x11c>;
clock-names = "baudclk\0apb_pclk";
dmas = <0x44 0x02 0x44 0x03>;
pinctrl-0 = <0xe7 0xe8>;
pinctrl-names = "default";
reg-io-width = <0x04>;
reg-shift = <0x02>;
status = "okay";
phandle = <0x1a1>;
};
What I can't find are any file named rk3568-uart on my system, but I can find files like rk3576-uart*
Same goes for all the other missing items like i2c, spi, etc.
I have no idea if this is the reason. But would love some help on this as I don;t want to move to a different distribution.
Thanks.
