On Tue, Oct 10, 2023 at 11:49:25PM +0100, Peter Griffin wrote:

+		serial_0: serial@10a00000 {
+			compatible = "google,gs101-uart";

You use this entry, but:

+			reg = <0x0 0x10a00000 0xc0>;
+			reg-io-width = <4>;
+			samsung,uart-fifosize = <256>;

See, it's really the samsung IP block.  Please don't declare new
compatible entries when you don't need to, it just adds churn to the
kernel for no reason (and makes you do more work.)

thanks,

greg k-h