Envelope-to: linux-kernel@vger.kernel.org
Date: Thu, 29 Apr 2004 15:58:29 +0200
From: stefan.eletzhofer@eletztrick.de
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc: Ian Campbell <icampbell@arcom.com>,
       Russell King - ARM Linux <linux@arm.linux.org.uk>
Subject: Re: [PATCH] 2.6 I2C epson 8564 RTC chip
Message-ID: <20040429135829.GB23468@gonzo.local>
Reply-To: stefan.eletzhofer@eletztrick.de
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	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Ian Campbell <icampbell@arcom.com>,
	Russell King - ARM Linux <linux@arm.linux.org.uk>
References: <20040429120250.GD10867@gonzo.local> <1083242482.26762.30.camel@icampbell-debian> <20040429135408.G16407@flint.arm.linux.org.uk>
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On Thu, Apr 29, 2004 at 01:54:08PM +0100, Russell King wrote:
> On Thu, Apr 29, 2004 at 01:41:23PM +0100, Ian Campbell wrote:
> > Hi Stefan,
> > 
> > > This driver only does the low-level I2C stuff, the rtc misc device
> > > driver is a separate driver module which I will send a patch for soon.
> > 
> > I have a patch (attached, it could do with cleaning up) for the Dallas
> > DS1307 I2C RTC which I ported from the 2.4 rmk patch, originally written
> > by Intrinsyc. Currently it includes both the I2C and the RTC bits in the
> > same driver.
> 
> Have a look at drivers/acorn/char/{i2c,pcf8583}.[ch]
> 
> > Do you think it is realistic/possible to have the same generic RTC
> > driver speak to multiple I2C devices, from what I can see in your driver
> > the two chips seem pretty similar and the differences could probably be
> > abstracted away. Perhaps that is your intention from the start?
> > 
> > I guess I will wait until you post the RTC misc driver and try and make
> > the DS1307 one work with that before I submit it.
> 
> If you look at the last 2.6-rmk patch, you'll notice that it contains
> an abstracted RTC driver - I got peed off with writing the same code
> to support the user interfaces to the variety of RTCs over and over
> again.  (Ones which are simple 32-bit second counters with alarms
> through to ones which return D/M/Y H:M:S.C format.)

Oh, I wasn't aware of that. I assume that one is not in linus bk tree already?

> 
> -- 
> Russell King
>  Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
>  maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
>                  2.6 Serial core
> -
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