I am trying to enable UART4 modifying DTS file, but still no /dev/ttyO4 found.
Kernel : 4.1
uart4_pins: pinmux_uart4_pins {
pinctrl-single,pins = <
0x70 (PIN_INPUT_PULLUP | MUX_MODE6) /* uart4_rxd.uart4_rxd */
0x74 (PIN_OUTPUT_PULLDOWN | MUX_MODE6) /* uart4_txd.uart4_txd */
>;
};
&uart4 {
pinctrl-names = "default";
pinctrl-0 = <&uart4_pins>;
status = "okay";
};