How to setup pad configurations for iomux in imx8mm

[qian_hao]

Hi,

I know that pinctrl drivers (pinctrl-imx.c and pinctrl-imx8mm.c) do PAD settings on boot time following device tree.

I have needs to change PAD's setting temporary in other driver's feature like:

        1. initialize GPIO5_19 to I2C3_SDA by pinctrl at boot time

        2. change I2C3_SDA into GPIO pin and output HIGH level in eeprom driver after boot

        3. change GPIO5_19 back to I2C3_SDA at end

I notice that I can use "mxc_iomux_v3_setup_pad()" which is defined in 'arch/arm/mach-imx/iomux-v3.h' for imx6dl.

Can I use that too for imx8mm ?

If it can't, is there any function to set IOMUX's PAD after pinctrl ?

Thank you,

Qian

[igorpadykov]

Hi Qian

>can use "mxc_iomux_v3_setup_pad()" which is defined in 'arch/arm/mach-imx/iomux-v3.h' for imx6dl.

>Can I use that too for imx8mm ?

yes seems it can be used, as there is in fsl-imx8mm.dtsi:

gpio1: gpio@30200000 {
        compatible = .. "fsl,imx35-gpio";

fsl-imx8mm.dtsi\freescale\dts\boot\arm64\arch - linux-imx - i.MX Linux kernel 

and iomux-mx35.h has #include "iomux-v3.h"

iomux-mx35.h\mach-imx\arm\arch - linux-imx - i.MX Linux kernel 

Best regards
igor
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