linux-kernel - Re: [PATCH v5] dt-bindings: PCI: altera: Convert to YAML

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Message-ID: <20240514131750.GA1214311-robh@kernel.org>
Date: Tue, 14 May 2024 08:17:50 -0500
From: Rob Herring <robh@...nel.org>
To: matthew.gerlach@...ux.intel.com
Cc: linux-kernel@...r.kernel.org, conor+dt@...nel.org,
	lpieralisi@...nel.org, krzysztof.kozlowski+dt@...aro.org,
	kw@...ux.com, bhelgaas@...gle.com, linux-pci@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v5] dt-bindings: PCI: altera: Convert to YAML

On Mon, May 13, 2024 at 05:12:42PM -0500, Rob Herring (Arm) wrote:
> 
> On Mon, 13 May 2024 15:59:13 -0500, matthew.gerlach@...ux.intel.com wrote:
> > From: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> > 
> > Convert the device tree bindings for the Altera Root Port PCIe controller
> > from text to YAML.
> > 
> > Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> > ---
> > v5:
> >  - add interrupt-conntroller #interrupt-cells to required field
> >  - don't touch original example dts
> > 
> > v4:
> >  - reorder reg-names to match original binding
> >  - move reg and reg-names to top level with limits.
> > 
> > v3:
> >  - Added years to copyright
> >  - Correct order in file of allOf and unevaluatedProperties
> >  - remove items: in compatible field
> >  - fix reg and reg-names constraints
> >  - replace deprecated pci-bus.yaml with pci-host-bridge.yaml
> >  - fix entries in ranges property
> >  - remove device_type from required
> > 
> > v2:
> >  - Move allOf: to bottom of file, just like example-schema is showing
> >  - add constraint for reg and reg-names
> >  - remove unneeded device_type
> >  - drop #address-cells and #size-cells
> >  - change minItems to maxItems for interrupts:
> >  - change msi-parent to just "msi-parent: true"
> >  - cleaned up required:
> >  - make subject consistent with other commits coverting to YAML
> >  - s/overt/onvert/g
> > ---
> >  .../devicetree/bindings/pci/altera-pcie.txt   | 50 ----------
> >  .../bindings/pci/altr,pcie-root-port.yaml     | 93 +++++++++++++++++++
> >  2 files changed, 93 insertions(+), 50 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/pci/altera-pcie.txt
> >  create mode 100644 Documentation/devicetree/bindings/pci/altr,pcie-root-port.yaml
> > 
> 
> My bot found errors running 'make dt_binding_check' on your patch:
> 
> yamllint warnings/errors:
> 
> dtschema/dtc warnings/errors:
> /builds/robherring/dt-review-ci/linux/Documentation/devicetree/bindings/pci/altr,pcie-root-port.example.dtb: pcie@...000000: interrupt-map: [[0, 0, 0, 1, 2, 1, 0, 0, 0], [2, 2, 2, 0, 0, 0, 3, 2, 3], [0, 0, 0, 4, 2, 4]] is too short
> 	from schema $id: http://devicetree.org/schemas/altr,pcie-root-port.yaml#

You need 3 address cells after the phandles since the interrupt parent 
has 3 address cells. 

What does your actual DT contain and do interrupts work because 
interrupts never would have worked I think? Making the PCI host the 
interrupt parent didn't even work in the kernel until somewhat recently 
(maybe a few years now). That's why a bunch of PCI hosts have an 
interrupt-controller child node.

Rob