[PATCH V3 01/10] dt-bindings: PCI: fsl,imx6q-pcie: Add reset GPIO in Root Port node
From: Sherry Sun <hidden>
Date: 2026-02-03 01:55:26
Also in:
imx, linux-devicetree, linux-pci, lkml
Subsystem:
open firmware and flattened device tree bindings, pci driver for imx6, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Richard Zhu, Lucas Stach, Lorenzo Pieralisi, Krzysztof Wilczyński, Manivannan Sadhasivam, Bjorn Helgaas, Linus Torvalds
Update fsl,imx6q-pcie.yaml to include the standard reset-gpios property for the Root Port node. The reset-gpios property is already defined in pci-bus-common.yaml for PERST#, so use it instead of the local reset-gpio property. Keep the existing reset-gpio property in the bridge node for backward compatibility, but mark it as deprecated. Signed-off-by: Sherry Sun <redacted> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> --- .../bindings/pci/fsl,imx6q-pcie.yaml | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
index 12a01f7a5744..d1a2526f43dc 100644
--- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml@@ -59,16 +59,34 @@ properties: - const: dma reset-gpio: + deprecated: true description: Should specify the GPIO for controlling the PCI bus device reset signal. It's not polarity aware and defaults to active-low reset sequence (L=reset state, H=operation state) (optional required). + This property is deprecated, instead of referencing this property from the + host bridge node, use the reset-gpios property from the root port node. reset-gpio-active-high: + deprecated: true description: If present then the reset sequence using the GPIO specified in the "reset-gpio" property is reversed (H=reset state, L=operation state) (optional required). + This property is deprecated along with the reset-gpio property above, use + the reset-gpios property from the root port node. type: boolean + pcie@0: + description: + Describe the i.MX6 PCIe Root Port. + type: object + $ref: /schemas/pci/pci-pci-bridge.yaml# + + properties: + reg: + maxItems: 1 + + unevaluatedProperties: false + required: - compatible - reg
@@ -229,6 +247,7 @@ unevaluatedProperties: false examples: - | #include <dt-bindings/clock/imx6qdl-clock.h> + #include <dt-bindings/gpio/gpio.h> #include <dt-bindings/interrupt-controller/arm-gic.h> pcie: pcie@1ffc000 {
@@ -255,5 +274,18 @@ examples: <&clks IMX6QDL_CLK_LVDS1_GATE>, <&clks IMX6QDL_CLK_PCIE_REF_125M>; clock-names = "pcie", "pcie_bus", "pcie_phy"; + + pcie_port0: pcie@0 { + compatible = "pciclass,0604"; + device_type = "pci"; + reg = <0x0 0x0 0x0 0x0 0x0>; + bus-range = <0x01 0xff>; + + #address-cells = <3>; + #size-cells = <2>; + ranges; + + reset-gpios = <&gpio7 12 GPIO_ACTIVE_LOW>; + }; }; ...
--
2.37.1