Messages in this thread | | | Subject | Re: [PATCH 1/3] arm64: dts: berlin4ct: add missing unit name to /soc node | From | Stephen Warren <> | Date | Tue, 6 Sep 2016 10:04:36 -0600 |
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On 09/06/2016 04:57 AM, Mark Rutland wrote: > On Tue, Sep 06, 2016 at 06:20:48PM +0800, Jisheng Zhang wrote: >> Hi Mark, >> >> On Tue, 6 Sep 2016 11:22:08 +0100 Mark Rutland wrote: >> >>> On Tue, Sep 06, 2016 at 04:55:55PM +0800, Jisheng Zhang wrote: >>>> This patch fixes the following DTC warning with W=1: >>>> >>>> "Node /soc has a reg or ranges property, but no unit name" >>>> >>>> Signed-off-by: Jisheng Zhang <jszhang@marvell.com> >>> >>> The node is only compatible with simple-bus, and so shouldn't have a >>> reg. >> >> IIUC, the warning is caused by "ranges = <0 0 0xf7000000 0x1000000>;" > > Hmm.. I've rather confused by that warning. Per ePAPR and the > devicetree.org spec, the unit-addresss is meant to match the reg > property, and no mention is made of the ranges property. So I do not > think that it is necessary to require this. > > That warning seems to have gone into DTC in commit c9d9121683b35281 > ("Warn on node name unit-address presence/absence mismatch"). > > Rob, Stephen, was there some discussion that prompted ranges requiring > a matching unit-address?
It looks like there was some in response to V2 of the patch which introduced this warning in dtc:
https://lkml.org/lkml/2013/9/19/301
I assume that's why Rob added that part to the patch when he reposted it.
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