Re: [PATCH 0/6] mfd: Add support for the LTC4283 Hot Swap Controller

[Linus Walleij]

On Thu, Aug 14, 2025 at 12:52 PM Nuno Sá via B4 Relay
<devnull+nuno.sa.analog.com@xxxxxxxxxx> wrote:

> The LTC4283 device features programmable current limit with foldback and
> independently adjustable inrush current to optimize the MOSFET safe
> operating area (SOA). The SOA timer limits MOSFET temperature rise for
> reliable protection against overstresses.
>
> An I2C interface and onboard ADC allow monitoring of board current, voltage,
> power, energy, and fault status.
>
> It also features 8 pins that can be configured as GPIO devices. But since
> the main usage for this device is monitoring, the GPIO part is optional
> while the HWMON is being made as required.

This main device just screams Industrial I/O, IIO.

(I think it's fine to use an MFD core and split off GPIO to a
separate driver, and I suggest maybe you merge MFD and
GPIO ahead of the main driver.)

Jonathan (Cameron) will have the last word on it but IMO this firmly
belongs below drivers/iio.

Perhaps not in one of the existing subdirs there but then it is time to
be brave and create a new one.

It will take some time and consideration, but I think it would be better
for everyone.

Yours,
Linus Walleij