Re: [PATCH v2 3/4] ACPI / gpio: Add hogging support

From	Mika Westerberg <mika.westerberg@linux.intel.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 3/4] ACPI / gpio: Add hogging support
Date	2016-10-20 14:30 +0200
Message-ID	<sukDU-7vO-11@gated-at.bofh.it> (permalink)
References	<smJSO-4KE-11@gated-at.bofh.it> <smJSO-4KE-19@gated-at.bofh.it> <sukky-7mR-11@gated-at.bofh.it>
Organization	Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo

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On Thu, Oct 20, 2016 at 02:09:30PM +0200, Linus Walleij wrote:
> On Thu, Sep 29, 2016 at 3:39 PM, Mika Westerberg
> <mika.westerberg@linux.intel.com> wrote:
> 
> > GPIO hogging means that the GPIO controller can "hog" and configure certain
> > GPIOs without need for a driver or userspace to do that. This is useful in
> > open-connected boards where BIOS cannot possibly know beforehand which
> > devices will be connected to the board.
> >
> > This adds GPIO hogging mechanism to ACPI analogous to Device Tree.
> >
> > Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> 
> Overall nice to have the hogs in ACPI too!
> 
> Again here my comment is to break out device_property() and fwnode_*
> accessing code to a file shared between ACPI and OF.
> 
> If it makes sense.
> 
> Because the idea was not to invent those abstractions in order to
> just use them with ACPI I hope.
> 
> The problem is that some of the code seems to be ACPI-specific,
> so if it doesn't work out, I'm also OK to keep it like this.

Yeah, this one differs between ACPI and DT and I'm not sure if it can be
easily generalized using device_property APIs.

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Re: [PATCH v2 3/4] ACPI / gpio: Add hogging support Linus Walleij <linus.walleij@linaro.org> - 2016-10-20 14:10 +0200
  Re: [PATCH v2 3/4] ACPI / gpio: Add hogging support Mika Westerberg <mika.westerberg@linux.intel.com> - 2016-10-20 14:30 +0200

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