Re: [RFC PATCH] gpio: add GPIO hogging mechanism

Felipe Balbi
2013-12-19T16:48:29Z

[-- Attachment #1: Type: text/plain, Size: 735 bytes --]

On Thu, Dec 19, 2013 at 08:41:09AM -0800, Greg Kroah-Hartman wrote:
> On Thu, Dec 19, 2013 at 03:34:31PM +0100, Boris BREZILLON wrote:
> > GPIO hogging is a way to request and configure specific GPIO without
> > explicitly requesting it in the device driver.
> >
> > The request and configuration procedure is handled in the core device
> > driver code before the driver probe function is called.
> >
> > It allows specific GPIOs to be configured without any driver specific code.
> >
> > Particularly usefull when a external device is connected to a bus and the
> > bus connections depends on an external switch controlled by a GPIO pin.

for external switches, you probably need a pinctrl-gpio driver.

--
balbi

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]