How to set the pin mux

  1. Find out Mux position for the respective pin from the datasheet at: RZ Family / RZ/G, RZ/V Series and find the corresponding mux position for the desired functionality with the RZG2L_pinfunction_List spreadsheet.
  2. Then preparepinmux function call according to RZG2L_PORT_PINMUX(A, B, C) where:
    • A = portnumber (e.g. for P40_1 it would be 40)
    • B = pin number (e.g. for P40_0 it would be 0)
    • C = mux position according to the above linked pinfunction spreadsheet
  4. Prepare a .dts file to override any previous/existing pin mux setting. Prepare a file with the following example contents:
   &pinctrl {
	can0_pins: can0 {
		pinmux = <RZG2L_PORT_PINMUX(10, 1, 2)>, /* TX */
			 <RZG2L_PORT_PINMUX(11, 0, 2)>; /* RX */
	};

	can1_pins: can1 {
		pinmux = <RZG2L_PORT_PINMUX(40, 0, 3)>, /* TX */
			 <RZG2L_PORT_PINMUX(40, 1, 3)>; /* RX */
	};
 };

and store the file in meta-mistysom/recipes-kernel/linux/dts/ 6. Add a line like:

SRC_URI += "file://add-vsc8531-ethernet.dts"

to meta-mistysom/recipes-kernel/linux/linux-renesas_%.bbappend 7. Build and use the pins as configured From: https://codebrowser.dev/linux/linux/include/dt-bindings/pinctrl/rzg2l-pinctrl.h.html