Messages in this thread | | | From | Grant Likely <> | Date | Thu, 28 May 2009 07:34:02 -0600 | Subject | Re: [RFC] [PATCH] Device Tree on ARM platform |
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On Thu, May 28, 2009 at 12:34 AM, Wolfram Sang <w.sang@pengutronix.de> wrote: > >> It is inherent in the value "atmel,24c08". Because the exact device >> model is specified, the kernel can know what the page size and flags >> are for that device. > > I am afraid this is not the case. I remember that we once had two revisions of > the same eeprom, and the vendor decided to increase the page size without > changing the naming of the eeprom. (Can't point to any documentation yet, would > have to dig this up.) Those eeproms can be really weird. > > Also, there are _a lot_ of eeprom manufacturers out there, so the match table > will be enormous....
... which is the whole point of "compatible". Every possible variant doesn't get listed in the device driver; device nodes in the tree claim compatibility with older, already known parts.
g.
-- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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