Query on pin multiplexing with device tree

[Victor Ascroft]

Hello,

pinctrl_touchctrl_idle: touchctrl_idle {
            fsl,pins = <
                MF610_PAD_PTA18__GPIO_8            0x0041
                MF610_PAD_PTA19__GPIO_9            0x0041
                >;
        };

        pinctrl_touchctrl_read: touchctrl_read {
            fsl,pins = <
                MF610_PAD_PTA18__ADC0_SE0        0x0041
                MF610_PAD_PTA19__ADC0_SE1        0x0041
                >;

If i have pin multiplexing in device tree as above, how can i select and change 
the pin multiplexing at run time?

Regards,
Sanchayan

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