[coreboot] GPIOs on CS5536 based boards

Daniel Mack daniel at caiaq.de
Wed Sep 23 19:10:02 CEST 2009

On Wed, Sep 23, 2009 at 06:04:57PM +0200, Peter Stuge wrote:
> Myles Watson wrote:
> > > > Also, when booting Linux, the LED driver does not work with
> > > > coreboot for me.
> > >
> > > The issue is that the driver is using a hard coded base address
> > > rather than finding out what is actually programmed into the device,
> > > and because coreboot doesn't assign resources exactly like the
> > > factory BIOS, the driver can't find the hardware.
> > 
> > Depending on the address, that could be easy to fix.  If it is
> > below 0x1000 it is almost trivial.
> It's at 6000 something, and I don't like to. I would much prefer the
> driver not make assumptions for no da^Wreason.

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.


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