linux-kernel - Re: [PATCH 4/5] W1: w1-gpio - rework handling of platform data

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Date:	Sat, 23 Feb 2013 12:06:27 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Ville Syrjälä <syrjala@....fi>
Cc:	linux-kernel@...r.kernel.org, Evgeniy Polyakov <zbr@...emap.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Daniel Mack <zonque@...il.com>
Subject: Re: [PATCH 4/5] W1: w1-gpio - rework handling of platform data

On Sat, Feb 23, 2013 at 06:55:45PM +0200, Ville Syrjälä wrote:
> On Fri, Feb 22, 2013 at 11:58:39PM -0800, Dmitry Torokhov wrote:
> > The platform data in the dveice structure does not belong to the driver
> > and so it should not be trying to alter it, but instead use a local pointer
> > and populate it with a local copy in case we are dealing with device tree
> > setup.
> > 
> > Also allow mixed setups where platform data coexists with device tree and
> > prefer kernel-supplied data (it may be easier to fiddle in kernel structure
> > before committing final result to device tree).
> > 
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> > ---
> >  drivers/w1/masters/w1-gpio.c | 93 +++++++++++++++++++++++++-------------------
> >  1 file changed, 53 insertions(+), 40 deletions(-)
> > 
> > diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c
> > index aa97a96..ee6b6e3 100644
> > --- a/drivers/w1/masters/w1-gpio.c
> > +++ b/drivers/w1/masters/w1-gpio.c
> > @@ -23,28 +23,33 @@
> >  #include "../w1.h"
> >  #include "../w1_int.h"
> >  
> > +struct w1_gpio {
> > +	struct w1_bus_master master;
> > +	const struct w1_gpio_platform_data *pdata;
> > +};
> 
> I don't understand why you need this wrapper struct. It doesn't
> seem to serve much purpose, other than to cause code churn in
> the patch.

Hm, yes, you are right, I should be able to get rid of it...

Thanks.

-- 
Dmitry
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