Location for a kind of GPIO bus driver

Linus Walleij linus.walleij at linaro.org
Thu Jul 25 17:46:42 EDT 2013

On Tue, Jul 23, 2013 at 5:18 PM, Simon Guinot <simon.guinot at sequanux.org> wrote:

> (...)  I am
> thinking about moving the GPIO extension bus support into a separate
> driver. The problem is that I can't find a proper location for a such
> driver. AFAIK, it doesn't fit with anything existing supported by Linux.
> Maybe I should consider drivers/bus ? Or even drivers/misc ?

This is a question to Greg, the device core maintainer.
AFAICT they go into drivers/base/foo-bus.c

In this case I would first consider using MFD though,
please make a case for why this is not simply a multi
function device with a few cells (== platform devices).

> Also from a DT point, it not clear to me how the resulting bus and LEDs
> driver are going to work together.

Buses are nodes in the device tree and subdevices are

Linus Walleij

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