Using UART_C on Le Potato (Pins 19 and 21)

Software
1

I can confirm that this .dts does in fact enable RX on pin 21 and TX on pin 19 on /dev/ttyAML7

/*
 * Copyright (c) 2017 BayLibre, SAS.
 * Author: Neil Armstrong <narmstrong@baylibre.com>
 *
 * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 */

/*
 * Overlay aimed to enable UART_C on Header 7J1 :
 * Pins 21 (TX), 19 (RX)
 */

/dts-v1/;
/plugin/;

/ {
        compatible = "libretech,cc", "amlogic,s905x", "amlogic,meson-gxl";

        fragment@0 {
                target-path = "/aliases";

                __overlay__ {
                        serial4 = "/soc/cbus@c1100000/serial@84c0";
                };
        };

        fragment@1 {
                target = <&uart_C>;

                __overlay__ {
                        status = "okay";
                        pinctrl-0 = <&uart_c_pins>;
                        pinctrl-names = "default";
                };
        };
};

I have data rolling in from a GPS module on this serial port. Please note I do NOT have any spi overlays enabled, as these pins are shared with the SPI interface.

Jeff