linux-kernel - Re: [PATCH 1/3] drivers/gpio: Port gpio driver to ls1021a-qds platform

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Date:	Mon, 3 Aug 2015 10:07:06 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Shaveta Leekha <shaveta@...escale.com>,
	Alexander Stein <alexander.stein@...tec-electronic.com>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	r64188@...escale.com, Alexandre Courbot <gnurou@...il.com>
Subject: Re: [PATCH 1/3] drivers/gpio: Port gpio driver to ls1021a-qds platform

Alexander Stein and Uwe Kleine-König are working on this
driver for this kernel cycle so requesting their help in
reviewing these three patches.

Alexander/Uwe: can you see the patches, or will Shaveta
need to resend them?

On Thu, Jul 30, 2015 at 9:27 AM, Shaveta Leekha <shaveta@...escale.com> wrote:

> LS1021a-qds has the same ip block/controller as
> GPIO on powerpc platform(MPC8XXX).
>
> So use portable i/o accessors, as in_be32/out_be32
> accessors are Power architecture specific whereas
> ioread/writebe32 are available in other architectures.
>
> GPIO controller's registers are big endian, the
> accessors ioread32be/iowrite32be matches this one
> and portable on powerpc as well on ARM.
>
> Signed-off-by: Shaveta Leekha <shaveta@...escale.com>
> ---
> Tested on Freescale SDK 1.8, as LS1021aQDS support is not yet complete in upstream

Do you mean that Freescale has synthesized this GPIO
controller on ARM LE too? In that case that is very useful
information that should go into the commit message.

Yours,
Linus Walleij
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