[...] >> + >> +3. Unit addresses shall use lowercase hex, without leading zeros (padding). > > I'm curious, what's the reason for this ? I think it makes the sources > less readable. If the rule is "just" because that's how DT sources are > written today and it would be too complicated to change that, that's > fine with me. One more thing not mentioned is "no 0x prefix" (the unit address is *always* interpreted as hex). Lowercase hex seems to be (in my experience?) the consensus for everything except preprocessor defines across the spectrum No leading zeroes.. I guess it was just eye-pleasing for people that have been doing devicetree to date, myself included. Konrad