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dt-bindings: PCI: snps,dw-pcie-ep: Add tx_int{a,b,c,d} legacy IRQs

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The DWC core has four interrupt signals: tx_inta, tx_intb, tx_intc, tx_intd
that are triggered when the PCIe controller (when running in Endpoint mode)
has sent an Assert_INTA Message to the upstream device.

Some DWC controllers have these interrupt in a combined interrupt signal.

Add the description of these interrupts to the device tree binding.

Link: https://lore.kernel.org/linux-pci/20240607-rockchip-pcie-ep-v1-v5-3-0a042d6b0049@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
This commit is contained in:
Niklas Cassel 2024-06-07 13:14:23 +02:00 committed by Krzysztof Wilczyński
parent b96353773d
commit 6f308c017c
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Documentation/devicetree/bindings/pci/snps,dw-pcie-ep.yaml
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@ -151,6 +151,15 @@ properties:
Application-specific IRQ raised depending on the vendor-specific
events basis.
const: app
- description:
Interrupts triggered when the controller itself (in Endpoint mode)
has sent an Assert_INT{A,B,C,D}/Desassert_INT{A,B,C,D} message to
the upstream device.
pattern: "^tx_int(a|b|c|d)$"
- description:
Combined interrupt signal raised when the controller has sent an
Assert_INT{A,B,C,D} message. See "^tx_int(a|b|c|d)$" for details.
const: legacy
- description:
Vendor-specific IRQ names. Consider using the generic names above
for new bindings.