linux-kernel - RE: [PATCH] mfd: pxa-w1: MFD driver for PXA 1wire control + DS1WM chip

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Message-ID: <25B60CDC2F704E4E9D88FFD52780CB4C05CEAFFB95@SC-VEXCH1.marvell.com>
Date:	Mon, 14 Mar 2011 05:34:08 -0700
From:	Haojian Zhuang <hzhuang1@...vell.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
CC:	"johnpol@....mipt.ru" <johnpol@....mipt.ru>,
	"a.zummo@...ertech.it" <a.zummo@...ertech.it>,
	"lrg@...mlogic.co.uk" <lrg@...mlogic.co.uk>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"dmitry.torokhov@...il.com" <dmitry.torokhov@...il.com>,
	"dtor@...l.ru" <dtor@...l.ru>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] mfd: pxa-w1: MFD driver for PXA 1wire control + DS1WM
 chip



>-----Original Message-----
>From: Samuel Ortiz [mailto:sameo@...ux.intel.com]
>Sent: 2011年3月14日 7:29 PM
>To: Haojian Zhuang
>Cc: johnpol@....mipt.ru; a.zummo@...ertech.it; lrg@...mlogic.co.uk;
>broonie@...nsource.wolfsonmicro.com; dmitry.torokhov@...il.com;
>dtor@...l.ru; rpurdie@...ys.net; linux-kernel@...r.kernel.org
>Subject: Re: [PATCH] mfd: pxa-w1: MFD driver for PXA 1wire control +
>DS1WM chip
>
>Hi Haojian,
>
>On Mon, Mar 07, 2011 at 11:43:20PM +0800, Haojian Zhuang wrote:
>> This driver provides registers and IRQ of PXA3xx chips to the ds1wm
>driver.
>Why is this an MFD driver ?
>
>Cheers,
>Samuel.
>
>--
>Intel Open Source Technology Centre
>http://oss.intel.com/

Hi Samuel,

Because there's already a DS1WM driver in drivers/w1/masters/ds1wm.c. In PXA silicons, W1 controler is compatible with this driver. So we implement it as MFD driver, like htc-pasic3.c.

Best Regards
Haojian