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Tue, 26 Nov 2024 02:22:56 -0800 (PST) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:52eb:f6ff:feb3:451a]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-433b01e1046sm228378075e9.4.2024.11.26.02.22.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Nov 2024 02:22:56 -0800 (PST) From: Neil Armstrong Date: Tue, 26 Nov 2024 11:22:49 +0100 Subject: [PATCH 1/3] dt-bindings: PCI: qcom,pcie-sm8550: document 'global' interrupt Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241126-topic-sm8x50-pcie-global-irq-v1-1-4049cfccd073@linaro.org> References: <20241126-topic-sm8x50-pcie-global-irq-v1-0-4049cfccd073@linaro.org> In-Reply-To: <20241126-topic-sm8x50-pcie-global-irq-v1-0-4049cfccd073@linaro.org> To: Bjorn Helgaas , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Neil Armstrong X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; 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a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Qcom PCIe RC controllers are capable of generating 'global' SPI interrupt to the host CPU. This interrupt can be used by the device driver to handle PCIe link specific events such as Link up and Link down, which give the driver a chance to start bus enumeration on its own when link is up and initiate link training if link goes to a bad state. The PCIe driver can still work without this interrupt but it will provide a nice user experience when device gets plugged and removed. Document the interrupt as optional for SM8550 and SM8650 platforms. Signed-off-by: Neil Armstrong --- Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.yaml | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.yaml index 24cb38673581d7391f877d3af5fadd6096c8d5be..19a614c74fa2aae94556ae3dfc24dcfcd520af11 100644 --- a/Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.yaml +++ b/Documentation/devicetree/bindings/pci/qcom,pcie-sm8550.yaml @@ -55,9 +55,10 @@ properties: interrupts: minItems: 8 - maxItems: 8 + maxItems: 9 interrupt-names: + minItems: 8 items: - const: msi0 - const: msi1 @@ -67,6 +68,7 @@ properties: - const: msi5 - const: msi6 - const: msi7 + - const: global resets: minItems: 1 @@ -137,9 +139,10 @@ examples: , , , - ; + , + ; interrupt-names = "msi0", "msi1", "msi2", "msi3", - "msi4", "msi5", "msi6", "msi7"; + "msi4", "msi5", "msi6", "msi7", "global"; #interrupt-cells = <1>; interrupt-map-mask = <0 0 0 0x7>; interrupt-map = <0 0 0 1 &intc 0 0 0 149 IRQ_TYPE_LEVEL_HIGH>, /* int_a */