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    SubjectRe: [PATCH 1/3] cs5535-gpio: add AMD CS5535/CS5536 GPIO driver support
    At Thu, 20 Aug 2009 12:40:02 -0400,
    Andres Salomon wrote:
    >
    > On Thu, 20 Aug 2009 17:21:20 +0200
    > Takashi Iwai <tiwai@suse.de> wrote:
    >
    > > At Tue, 18 Aug 2009 17:53:14 -0400,
    > > Andres Salomon wrote:
    > > >
    > > >
    > > > This creates a CS5535/CS5536 GPIO driver which uses a gpio_chip
    > > > backend (allowing GPIO users to use the generic GPIO API if
    > > > desired) while also allowing architecture-specific users directly
    > > > (via the cs5535_gpio_* functions).
    > >
    > > Will be any user of cs5535_gpio_*() expected? If not, it'd be better
    > > not to export stuff, IMO.
    > >
    >
    > The olpc-dcon driver, for one. If desired, I can remove the exports
    > for now.

    Ah, OK. If this is going to be merged soonish, it should be fine
    to have the exports from the beginning.


    > > > Tested on an OLPC machine. Some Leemotes also use CS5536 (with a
    > > > mips cpu), which is why this is in drivers/gpio rather than
    > > > arch/x86. Currently, it conflicts with older geode GPIO support;
    > > > once MFGPT support is reworked to also be more generic, the older
    > > > geode code will be removed.
    > >
    > > .... or you can rewrite the old driver to use the functions above?
    > > Then the ugly Kconfig check can be dropped, too. (yeah that's an
    > > answer to my own question above.)
    >
    > I guess in theory I could..
    >
    >
    > >
    > > BTW CONFIG_GPIO_CS5536 and CONFIG_CS5536_GPIO are so confusing... :)
    > >
    >
    > Agreed. I'd really like CONFIG_CS5535_GPIO to go away, but first there
    > needs to be a replacement. CONFIG_CS5535_GPIO will probably also need
    > to be marked DEPRECATED for a while, too, since it's a
    > userspace-visible change. I can follow up w/ a patch for that once
    > people are happy w/ this current set of patches.

    Agreed. Unless the compatible feature is given, some deprecation
    period would be safer.


    thanks,

    Takashi


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