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SubjectRe: [PATCH 1/3] cs5535-gpio: add AMD CS5535/CS5536 GPIO driver support
On Thu, 20 Aug 2009 17:21:20 +0200
Takashi Iwai <> 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.

> > 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.

> > Signed-off-by: Andres Salomon <>
> I can happily merge this patch series to sound GIT tree if no one
> objects, since it's basically for OLPC sound stuff.
> thanks,
> Takashi

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