Hi Geert, On Monday 31 March 2014 10:39:48 Geert Uytterhoeven wrote: > On Sat, Mar 29, 2014 at 12:36 AM, Laurent Pinchart wrote: > > +Required Properties: > > + > > + - compatible: Must contain "renesas,ipmmu-vmsa". > > + - reg: Base address and size of the IPMMU registers. > > + - interrupts: Specifier for the MMU fault interrupt. > > Does it make sense to have a property for the number of micro-TLBs, > or is this handled transparently? > > E.g. ipmmu_mx has 24 micro-TLBs, but ipmmu_mp has 30. The IPMMU driver doesn't need to know the number of micro-TLBs, so we should be fine without specifying it in DT. The micro-TLBs are configured when a bus master device is attached or detached, and at that point the device provides its micro-TLB number. The only reason I can foresee why the number of micro-TLBs would be useful is to iterate over micro-TLBs when the driver probes the device to disable them all. A mask would probably be better than a number in that case, and I think we can always add that later if we find a need for it. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
