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    SubjectRe: [PATCH 0/8] Generic I2C and SPI register map library
    On 06/23/11 02:25, Mark Brown wrote:
    > On Thu, Jun 23, 2011 at 12:48:28AM +0200, torbenh wrote:
    >
    >> you should look at SMBus
    >> there seems to be quite some code to share.
    >> in particular i2c rtc devices seem to be using SMBus functions
    >> to get the exact same semantics you are providing here.
    >
    > SMBus is an I2C subset with a definition for 8 bit registers layered
    > onto it, pretty much.
    >
    >> I just added support for such a device today, and it struck me, that
    >> this API was necessary.
    >
    > If you're only using SMBus then the I2C interface includes SMBus based
    > register support which should do what you want. With the regmap API it
    > ought to work as a device with 8 bit registers and 8 bit values.

    The kicker here is that quite a few hosts only support the smbus subset.
    How should that be handled here?


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