[RFC PATCH v3 2/2] drivers: mfd: vexpress: add Serial Power Controller (SPC) support
olof at lixom.net
Fri Jun 14 13:49:48 EDT 2013
On Fri, Jun 14, 2013 at 02:04:00PM +0100, Pawel Moll wrote:
> On Thu, 2013-06-13 at 23:52 +0100, Olof Johansson wrote:
> > > + reg = <0 0x7FFF0000 0 0x1000>;
> > #size-cells 2 on the parent bus? That's somewhat unusual.
> LPAE == 40 bit physical addresses == potential > 32 bit sizes (memory
> blocks > 4GB)
Yeah, I guess that's most commonly needed for the /memory nodes -- having
devices with more than 4GB of register space is quite unusual.
It doesn't really matter much, but it saves some padding of 0s if you
pick a smaller value.
I thought we used 2/1 for address/size-cells on PA Semi hardware, but I just
checked and we had 2/2. Maybe it was Apple that used 2/1.
Anyway, no big deal.
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