On Thu, Nov 26, 2015 at 02:16:16PM +0100, Mason wrote: > #define SCU_BASE 0x20000000 > > scu: scu@XXX { > compatible = "arm,cortex-a9-scu"; > reg = <SCU_BASE 0x100>; > > gic: interrupt-controller@XXX { > compatible = "arm,cortex-a9-gic"; > reg = <SCU_BASE+0x1000 0x1000>, <SCU_BASE+0x100 0x0100>; You don't get preprocessor arithmetic here. What you get is this passed to DTC: reg = <0x20000000+0x1000 0x1000>... The only time the preprocessor does arithmetic is when it needs to evaluate an expression, eg, in an #if statement. The @XXX are part of the requirements from ePAPR, and are required to be conformant with the spec. -- FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net. -- 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