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Add the optional property >> "memory-regions" to point to such regions of memory when PVU is used. >> >> Since the PVU deals with system physical addresses, utilizing the PVU >> with PCIe devices also requires setting up the VMAP registers to map the >> Requester ID of the PCIe device to the CBA Virtual ID, which in turn is >> mapped to the system physical address. Hence, describe the VMAP >> registers which are optional unless the PVU shall be used for PCIe. >> >> Signed-off-by: Jan Kiszka >> --- >> CC: Lorenzo Pieralisi >> CC: "Krzysztof Wilczyński" >> CC: Bjorn Helgaas >> CC: linux-pci@vger.kernel.org >> --- >> .../bindings/pci/ti,am65-pci-host.yaml | 29 +++++++++++++++++-- >> 1 file changed, 26 insertions(+), 3 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml b/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml >> index 0a9d10532cc8..0c297d12173c 100644 >> --- a/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml >> +++ b/Documentation/devicetree/bindings/pci/ti,am65-pci-host.yaml >> @@ -20,14 +20,18 @@ properties: >> - ti,keystone-pcie >> >> reg: >> - maxItems: 4 >> + minItems: 4 >> + maxItems: 6 >> >> reg-names: >> + minItems: 4 >> items: >> - const: app >> - const: dbics >> - const: config >> - const: atu >> + - const: vmap_lp >> + - const: vmap_hp >> >> interrupts: >> maxItems: 1 >> @@ -83,13 +87,30 @@ if: >> compatible: >> enum: >> - ti,am654-pcie-rc >> + >> then: >> + properties: >> + memory-region: > > I think I said it two times already. You must define properties in > top-level. That's how we expect, that's how dtschema works (even if it > works fine otherwise, it's not always that case), that's how almost all > bindings are written. Look, if you have such rules, also enhance the checker, or people like me will continue to work intuitively. Add reasoning along that as well, would help further to reduce your review effort. The current situation with rather fuzzy results from the checker and strange mechanisms inside (see my maxItems finding) is not very helpful IMHO. I this concrete case, I would add this item top-level, just to set maxItems to 0 for ti,keystone-pcie? Not a pattern I'm finding anywhere. Or do we have to allow memory-regions for all compatibles now? Sorry for all these iterations, but you should see from my questions and actions where the problems in the concepts are. Jan -- Siemens AG, Technology Linux Expert Center