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. -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/