linux-kernel - Re: [PATCH] rtc: max8997: Add driver for max8997 rtc.

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Message-Id: <20130206182817.3af25596.akpm@linux-foundation.org>
Date:	Wed, 6 Feb 2013 18:28:17 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	jonghwa3.lee@...sung.com
Cc:	linux-kernel@...r.kernel.org, a.zummo@...ertech.it,
	rtc-linux@...glegroups.com
Subject: Re: [PATCH] rtc: max8997: Add driver for max8997 rtc.

On Thu, 07 Feb 2013 10:43:23 +0900 jonghwa3.lee@...sung.com wrote:

> > The best way of handling this sort of thing is for the driver to probe
> > the hardware, work out its capabilities and "do the right thing".
> > 
> > The second best way is to require that the user add certain module
> > parameters to enable the functionality.
> > 
> 
> How do we create sysfs node for enabling these options?

I suggest using module_param[_named](), so users can execute "modprobe
max8997 wtsr=1".  Or, if the driver is built into vmlinux, add
"max8997.wtsr=1" to the kernel boot command line.

Documentation/kernel-parameters.txt mentions this.
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