sen1_pwren GPIO pin is not able to power OFF/ON

[Naveen Krishna Yadav Malyala]

I am trying to do power on/off  the below GPIO pin through UART test commands or through normal power on/off operation.
 i am not able to see the pin getting ON/OFF, nothing it is reflecting .

shared the below dts code for the pin

    aliases {

        sen1pwren = &sen1_pwren;

gpios {

        compatible = "gpio-keys";

        sen1_pwren: sen1_pwren {

            gpios = <&gpio1 02 GPIO_ACTIVE_HIGH>;

            label = "sen1 pwren";

        };

i  am using the correct pin configuration as shared, please provide any inputs why it is not being operable ?

[Einar Thorsrud]

Hi,

I am lacking some context here. Can you describe more what you are doing (perhaps show the code)? Also, what does ON/OFFm ean in this context? GPIO output pin high or low? Or something else? Please elaborate.

[Naveen Krishna Yadav Malyala]

I am doing the below task

Board bringup support - Implement UART test commands to turn-ON required power switches

I am trying to control the sen1pwren GPIO pin through my UART test commands
(like on sen1pwren/ off sen1pwren) sending from UART21 master link then it ON and OFF acoordingly.

Basically, i have written a test code for that, but i could see the sen1pwren  pin is NFC.
Need your support why it is not working for this pin, whereas i am able to control the other GPIO pins without any issue.

[Einar Thorsrud]

Hi,

I see. If you are using a NFC pin as GPIO you need to specify that in the devicetee like this (see an example here):

&uicr {
	nfct-pins-as-gpios;
};

Note that this will not work if you are using TF-M. For that you need this change, which will be part of nRF Connect SDK 3.2.0.