IOMUX in i.MX8M Plus

[Jimmychea]

Hi, Below are device tree are captured from imx8mp-evk.dts. I want to know if my custom board without HDMI, will below red color highlighted device tree still needed ?

&iomuxc {
    pinctrl-names = "default";
    pinctrl-0 = <&pinctrl_hog>;

    pinctrl_hog: hoggrp {
        fsl,pins = <
        MX8MP_IOMUXC_HDMI_DDC_SCL__HDMIMIX_HDMI_SCL 0x400001c3
        MX8MP_IOMUXC_HDMI_DDC_SDA__HDMIMIX_HDMI_SDA 0x400001c3
        MX8MP_IOMUXC_HDMI_HPD__HDMIMIX_HDMI_HPD 0x40000019
        MX8MP_IOMUXC_HDMI_CEC__HDMIMIX_HDMI_CEC 0x40000019
        >;
    };

};

[joanxie]

if you don't use HDMI, just leave HDMI_DDC_SCL, HDMI_DDC_SDA, HDMI_HPD, HDMI_CEC unconnected, on SW, you can ignore them and disable the HDMI

[Jimmychea]

Means can remove red highlighted part in imx8mp-evk.dts right ?

[joanxie · Accepted solution]

if you don't use these pad for other function you can remove it