linux-kernel - Re: [PATCH] input: serio: ams-delta: toggle keyboard power over GPIO

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Date:	Thu, 22 Dec 2011 09:45:38 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Janusz Krzysztofik <jkrzyszt@....icnet.pl>
Cc:	Tony Lindgren <tony@...mide.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH] input: serio: ams-delta: toggle keyboard power over GPIO

On Wed, Dec 21, 2011 at 08:55:09PM +0100, Janusz Krzysztofik wrote:
> On Wednesday 21 of December 2011 at 20:09:45, Tony Lindgren wrote:
> > * Janusz Krzysztofik <jkrzyszt@....icnet.pl> [111220 13:39]:
> > > Don't use Amstrad Delta custom I/O functions once GPIO interface is
> > > available for the underlying hardware.
> > > 
> > > While requesting and initializing GPIO pins used, also take care of one
> > > extra pin KEYBRD_DATAOUT which, even if not used by the driver, belongs
> > > to the device and affects its functioning.
> > > 
> > > Once done, move the driver initialization back to the device_initcall
> > > level, reverting the temporary chane introduced with patch 1/7 "ARM:
> > > OMAP1: ams-delta: register latch dependent devices later".  That change
> > > is no longer required once the driver takes care of registering used
> > > GPIO pins, and it's better to initialize the device before others using
> > > the latch2 based GPIO pins, otherwise a garbage is reported on boot,
> > > perhaps due to random data already captured by the FIQ handler while the
> > > keyboard related latch bits are written with random values during
> > > initialization of those other latch2 dependent devices.
> > > 
> > > Depends on patch 2/7 "ARM: OMAP1: ams-delta: convert latches to
> > > basic_mmio_gpio"
> > > 
> > > Signed-off-by: Janusz Krzysztofik <jkrzyszt@....icnet.pl>
> > 
> > I'm assuming Dmitry's ack for an earlier version of this patch also
> > covers this one when applying.
> 
> Hi Dmitry,
> Can we assume your ack still valid for this version?
> 

Yes, please merge with your other changes.

BTW, if you could rename :static struct gpio _gpios" to "ams_delta_gpios"
that would be even better.

Thanks!

-- 
Dmitry
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