linux-kernel - Re: [PATCH v2 1/3] gpiolib: export descriptor-based GPIO interface

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Message-ID: <CACRpkdYTJ_JQvFmf+AuCxmk5kGGw_CLGn0-xnO+PqGav45Se3Q@mail.gmail.com>
Date:	Wed, 16 Oct 2013 10:11:08 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Alexandre Courbot <acourbot@...dia.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Grant Likely <grant.likely@...aro.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Alexandre Courbot <gnurou@...il.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 1/3] gpiolib: export descriptor-based GPIO interface

On Fri, Oct 11, 2013 at 8:14 PM, Alexandre Courbot <acourbot@...dia.com> wrote:

> This patch exports the gpiod_* family of API functions, a safer
> alternative to the legacy GPIO interface. Differences between the gpiod
> and legacy gpio APIs are:
>
> - gpio works with integers, whereas gpiod operates on opaque handlers
>   which cannot be forged or used before proper acquisition
> - gpiod get/set functions are aware of the active low state of a GPIO
> - gpio consumers should now include <linux/gpio/consumer.h> to access
>   the new interface, whereas chips drivers will use
>   <linux/gpio/driver.h>
>
> The legacy gpio API is now built as inline functions on top of gpiod.
>
> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>

Typically I have applied the patch adding gpio_[un]lock_as_irq()
and it conflicts with this. And it requires adding gpiod_* accessors
for these functions too...

Would you mind rebasing this on top of my "devel" branch?

Sorry for the moving target, but after this I think we are ready to
merge the gpiod* interface.

Yours,
Linus Walleij
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