Re: [PATCH net-next v3 2/2] nfc: s3fwrn5: i2c: Enable the pvdd supply

[Asdlerto Korry]

Hi David,

thanks for looking into this and for the schematics pointer.

I don't have schematics for the Galaxy M52 5G, so I can only go by the
vendor kernel's device tree. Its NFC node describes a single switchable
supply: PVDD, a GPIO-controlled fixed regulator that the vendor driver
turns on before enabling the chip. None of VBAT, AVDD, DVDD, PLLVDD or
TVDD are referenced or controlled there, so on this board they are
presumably fed from always-on rails that the OS never touches.

With only pvdd-supply wired up, the chip probes and reads tags fine on
the M52.

I'd rather not add bindings for supplies I can't verify on real
hardware and that no board would use yet. If a board turns up where
e.g. AVDD/DVDD are switchable, they could be added then as further
optional supplies next to pvdd-supply.

Does that sound OK to you?

Thanks,
Asdlerto