linux-kernel - Re: [PATCH 1/4] hmc6352: Add driver for the HMC6352 compass

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Date:	Wed, 14 Apr 2010 15:32:34 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	Alan Cox <alan@...ux.intel.com>, linux-i2c@...r.kernel.org,
	khali@...ux-fr.org, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] hmc6352: Add driver for the HMC6352 compass

> This is in no way a hwmon chip.  Surely misc is a better location for now
> (pending the usual discussion about all singing all dancing sensors frameworks).

Yep it's moving at the moment


> > +#include <linux/module.h>
> > +#include <linux/init.h>
> > +#include <linux/slab.h>
> > +#include <linux/i2c.h>
> > +#include <linux/hwmon.h>
> 
> Why these extra hwmon includes?  At least at first glance I can't see
> any uses of them.  The only call to hwmon is to stick this in the
> hwmon class.

I inherited it for cleanup so these are good points (I've been staring at
piles of these for so long extra input is very useful - this is the tip
of the iceberg !)

> > +#include <linux/hwmon-sysfs.h>
> > +#include <linux/hwmon-vid.h>
> > +#include <linux/err.h>
> > +#include <linux/delay.h>
> or any mutex usage?
> > +#include <linux/mutex.h>
> > +#include <linux/sysfs.h>
> > +
> 
> I guess this makes the driver look like many others, but why bother with
> the wrapping structure?  This is only used to keep track of the hwmon
> device to be able to remove it later.

Should go - agreed will remove

> These address changes looking a little unusual to me.  They may well be needed, but
> if so can we have an explanatory comment?

Will investigate.
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