Re: [v0 PATCH 5/5] EDAC: CPC925 MC platform device setup

[Harry Ciao]

Harry Ciao åé:
> Arnd Bergmann åé:
> > On Thursday 02 April 2009, Harry Ciao wrote:
> >  
> > > +#ifdef CONFIG_EDAC
> > > +#define CPC925_MC_START                0xf8000000
> > > +#define CPC925_MC_END          0xf8ffffff /* sizeof 16MB */
> > > +/* Register a platform device for CPC925 memory controller */
> > > +static int __init maple_cpc925_edac_setup(void)
> > >     
> >
> > It's not good to have these encoded as magic numbers.
> > Can't you find the addresses in the device tree? Maybe it's
> > even possible to make this an of_platform_driver if you
> > find a good node to bind to.
> >
> > Does the driver also work on a G5 Mac, or is it limited
> > to the maple platform?
> >
> >     Arnd <><
> >
> >  
Hi Arnd,

I forgot to mention that so far I have tested this CPC925 driver on the 
Maple platform, I have no G5 Mac to test with.
CPC925 is specific to the PowerPC 970 family of processors, but I don't 
think Maple is the only platform that ever use PowerPC 970 
processors(that is why this driver should depend on PP64, rather than 
PPC_MAPLE).

Thanks,

Harry

> Hi Arnd,
>
> I did try to get resource information from its DTB node first, the 
> "hostbridge" node do can be found successfully, however, 
> unfortunately, as I put in the notes in that function, the 
> #address-cells and #size-cells specified by its parent node are both 
> 2, but the cell number used in its "reg" property is actually 1, as
>
> reg = <0xf8000000 0x1000000>;
>
> which will make of_address_to_resource() failed with -EINVAL; that's 
> why I have to set it up from scratch manually.
>
> Cheers,
>
> Harry

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