Setting P0.30/AIN6 as GPIO enable pin

[redcorn32]

Hi. I am trying to make one sensor work on my nrf52840 based board. The problem is that eventhough the enable pin is set high in .dts file, it doesn't work. 

	bq35100@55 {
		compatible = "ti,bq35100";
		reg = <0x55>;
		enable-gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>;
		label = "BQ35100";
	};

I figured out with documentation that I need to reconfigure AIN6 to serve as an GPIO. How do I do that? 

[SwRa]

Hi Igor,

Pin P0.29 and P0.30 are not used for NFC in the 52840, it's P0.9 and P0.10. Sorry for the earlier mistake. I couldn't find DT binding for the device mentioned ( ti,bq35100) in Zephyr. Is 'enable-gpio' property included in the binding.? If not, it will be ignored. You will need to modify the DT binding to include the property to get it to work.

An alternative is to create a zephyr user node.. See here: https://docs.zephyrproject.org/latest/build/dts/zephyr-user-node.html#gpios

Best Regards,

Swathy

[Jason]

Yes, sorry, this was my mistake, the QFN48 package coincidentally has the NFC on physical pins that happen to have numbers 29 and 30 on the package, but obviously these are P0.09 and P0.10. Sorry for the confusion!

[redcorn32]

I have my own bq35100 driver which works on another custom nrf52840 board with enable-gpio on P1.03