[coreboot] GPIOs on CS5536 based boards

Daniel Mack daniel at caiaq.de
Tue Oct 6 05:04:03 CEST 2009

On Wed, Sep 23, 2009 at 01:25:21PM -0400, Tom Sylla wrote:
> On Wed, Sep 23, 2009 at 1:10 PM, Daniel Mack <daniel at caiaq.de> wrote:
> > Could you outline which steps would need to be taken in order to find
> > out the correct address to use? Any maybe a way to sany detect the
> > precence of that function on the board? I might go ahead and send a
> > patch for the driver then.
> Not really an outline; it is just one MSR read. Take a look at the
> GPIO kernel driver:
> http://lxr.linux.no/#linux+v2.6.31/drivers/char/cs5535_gpio.c#L188

One attempt to do that I just sumbitted to LKML:


Works fine here - let's see what the maintainers say.

Thanks for the pointers,

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