On Thu, Feb 9, 2017 at 2:27 AM, AKASHI, Takahiro <takahiro.akashi@xxxxxxxxxx> wrote: > > is there a requirement that the root node must have #address-cells/ > #size-cells? > I found such a statement, at least, in booting-without-of.txt > (only applied to ppc? See III-5-a). If you want to be able to represent 64-bit 'reg' addresses anywhere in the device tree, then you will need #address-cells = <2> and #size-cells = <2> at any appropriate location, which is usually the root node for a 64-bit processor. -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html