i.MX ProcessorsのトピックRe: Device tree i.mx8

Device tree i.mx8

efio — Fri, 12 May 2023 06:55:50 GMT

Hi,

I'm using i.MX8 evk - imx8mn and I want to define a gpio as input interrupt for gpio3 controller.

the original node of gpio3 is:

gpio3: gpio@30220000 {

compatible = "fsl,imx8mn-gpio", "fsl,imx35-gpio";

reg = <0x30220000 0x10000>;

interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,

<GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;

clocks = <&clk IMX8MN_CLK_GPIO3_ROOT>;

gpio-controller; #gpio-cells = <2>;

interrupt-controller;

#interrupt-cells = <2>;

gpio-ranges = <&iomuxc 0 61 26>;

};

The pin I would like to use is gpio24: MX8MN_IOMUXC_SAI5_RXD3_GPIO3_IO24, and I don't know how to add it.

Can you please help?

Thank you,

Rita_Wang — Fri, 12 May 2023 08:11:57 GMT

You can refer to iMX8MN Reference Manual in section Chapter 8 Chip IO and Pinmux > General Purpose Input/Output (GPIO) > Interrupt Control Unit.

efio — Sun, 14 May 2023 06:29:55 GMT

Hi,

Thank you, but I doesn't help - or maybe I'm missing something?

I'm looking for the the DT text I need to add:

e.g.

&gpio3 {

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_ac13_tx_trig>;

};

pinctrl_ac13_tx_trig: gpiogrp {
fsl,pins = <
MX8MN_IOMUXC_SAI5_RXD3_GPIO3_IO24 0x116
>;
};