linux-kernel - Re: [PATCH] mfd: Add TWL4030 PWM driver

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Message-Id: <201203210839.06258.arnd@arndb.de>
Date:	Wed, 21 Mar 2012 08:39:06 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Bernhard Walle <bernhard@...lle.de>
Cc:	Bernhard Walle <walle@...science.de>, sameo@...ux.intel.com,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	Thierry Reding <thierry.reding@...onic-design.de>
Subject: Re: [PATCH] mfd: Add TWL4030 PWM driver

On Wednesday 21 March 2012, Bernhard Walle wrote:
> Am 20.03.12 23:02, schrieb Arnd Bergmann:
> > On Tuesday 20 March 2012, Bernhard Walle wrote:
> >>
> >> This PWM driver uses the PWM of the TWL4030. The driver for the TWL6030
> >> PWM has been used as mode, but the PWM registers are different.
> >>
> >> The driver can be used and has been tested in conjunction with
> >> pwm-backlight to control a backlight LED of a LCD touch screen.
> >>
> >> Signed-off-by: Bernhard Walle <walle@...science.de>
> > 
> > Since it's too late for v3.4 now and we will get a new pwm
> > subsystem in v3.5, I suggest you change the driver to work
> > register with that subsystem instead of just using the old
> > header file. Note that drivers/mfd is not really the right
> > place anyway, because this is not a multifunction driver but
> > just one device driver that happens to be a slave of an mfd.
> 
> Does that new subsystem already exist in some tree?
 
Thierry Reding has been busily posting patches, so he probably has
one that you can use, but I couldn't find it now.

	Arnd
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