linux-kernel - Re: [PATCH v2 0/4] gpiolib: some fixup patches

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Message-ID: <CACRpkdaxMTHrabKawsufTBYVRW08YBa+hOBb12AVEzXHyox7_Q@mail.gmail.com>
Date:	Thu, 28 Feb 2013 07:21:34 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	Alexandre Courbot <gnurou@...il.com>,
	Ryan Mallon <rmallon@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"acourbot@...dia.com" <acourbot@...dia.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: Re: [PATCH v2 0/4] gpiolib: some fixup patches

On Wed, Feb 27, 2013 at 8:52 AM, Grant Likely <grant.likely@...retlab.ca> wrote:

> I've been playing with an idea of pulling in some basic MMIO gpio
> access directly into gpiolib so that when appropriate gpiolib itself
> can have a fast path for doing the register access and shadow register
> management.

Shadow registers: isn't that what regmap usually does? Or
what are you referring to here?

But fastpath MMIO in the gpiolib is an appealing thought,
given that this was a design impetus in the early history of
the subsystem.

Yours,
Linus Walleij
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