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    SubjectRe: [PATCH] 2.6 I2C epson 8564 RTC chip
    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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