linux-kernel - Re: [PATCH] i2c-mpc: avoid I2C abnormal after resuming from deep sleep

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Message-ID: <20120301112724.GE8441@trinity.fluff.org>
Date:	Thu, 1 Mar 2012 11:27:24 +0000
From:	Ben Dooks <ben-i2c@...ff.org>
To:	Wolfram Sang <w.sang@...gutronix.de>
Cc:	Zhao Chenhui <chenhui.zhao@...escale.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	Li Yang <leoli@...escale.com>
Subject: Re: [PATCH] i2c-mpc: avoid I2C abnormal after resuming from deep
	sleep

On Wed, Feb 29, 2012 at 07:45:23PM +0100, Wolfram Sang wrote:
> Hi,
> 
> On Wed, Feb 29, 2012 at 06:39:21PM +0800, Zhao Chenhui wrote:
> > When entering deep sleep, the value in the registers I2CFDR and
> > I2CDFSRR are lost. This causes I2C access to fail after resuming.
> > 
> > Add suspend/resume routines to save/restore the registers
> > I2CFDR and I2CDFSRR.
> > 
> > Signed-off-by: Zhao Chenhui <chenhui.zhao@...escale.com>
> > Signed-off-by: Li Yang <leoli@...escale.com>
> > ---
> >  drivers/i2c/busses/i2c-mpc.c |   34 +++++++++++++++++++++++++++++++++-
> >  1 files changed, 33 insertions(+), 1 deletions(-)
> > 
> > diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
> > index a8ebb84..f95a647 100644
> > --- a/drivers/i2c/busses/i2c-mpc.c
> > +++ b/drivers/i2c/busses/i2c-mpc.c
> > @@ -1,7 +1,9 @@
> >  /*
> >   * (C) Copyright 2003-2004
> >   * Humboldt Solutions Ltd, adrian@...boldt.co.uk.
> > -
> > + *
> > + * Copyright 2012 Freescale Semiconductor, Inc.
> > + *
> 
> I'd think the change is too trivial to claim copyright on the file.

I agree with that.

-- 
Ben Dooks, ben@...ff.org, http://www.fluff.org/ben/

Large Hadron Colada: A large Pina Colada that makes the universe disappear.

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