[REPOST RFC PATCH 0/3] New "gpio-poweroff" driver to turn off platform devices with GPIOs

[Mark Brown]

On Wed, Dec 14, 2011 at 02:34:37PM -0600, Moffett, Kyle D wrote:
> On Dec 14, 2011, at 07:02, Mark Brown wrote:

> > The regulator API in -next has DT bindings.

> Based on the description of our hardware, is there a good way that I
> can wire up gpio-regulator driver to our hardware with just the device
> tree (and maybe one small board-specific function) to make it shut down
> each domain in sequence at poweroff time? Otherwise I will just go back
> to my custom board-specific function for GPIO-twiddling.

No, it's a very rare use case so there's nothing off the shelf.  But it
should be straightfoward to write a device driver doing this.