249 lines
6.6 KiB
YAML
249 lines
6.6 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Freescale i.MX6 PCIe host controller
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maintainers:
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- Lucas Stach <l.stach@pengutronix.de>
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- Richard Zhu <hongxing.zhu@nxp.com>
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description: |+
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This PCIe host controller is based on the Synopsys DesignWare PCIe IP
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and thus inherits all the common properties defined in snps,dw-pcie.yaml.
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properties:
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compatible:
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enum:
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- fsl,imx6q-pcie
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- fsl,imx6sx-pcie
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- fsl,imx6qp-pcie
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- fsl,imx7d-pcie
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- fsl,imx8mq-pcie
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- fsl,imx8mm-pcie
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- fsl,imx8mp-pcie
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reg:
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items:
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- description: Data Bus Interface (DBI) registers.
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- description: PCIe configuration space region.
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reg-names:
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items:
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- const: dbi
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- const: config
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interrupts:
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items:
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- description: builtin MSI controller.
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interrupt-names:
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items:
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- const: msi
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clocks:
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minItems: 3
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items:
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- description: PCIe bridge clock.
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- description: PCIe bus clock.
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- description: PCIe PHY clock.
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- description: Additional required clock entry for imx6sx-pcie,
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imx8mq-pcie.
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clock-names:
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minItems: 3
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items:
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- const: pcie
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- const: pcie_bus
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- const: pcie_phy
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- enum: [ pcie_inbound_axi, pcie_aux ]
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num-lanes:
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const: 1
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fsl,imx7d-pcie-phy:
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$ref: /schemas/types.yaml#/definitions/phandle
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description: A phandle to an fsl,imx7d-pcie-phy node. Additional
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required properties for imx7d-pcie and imx8mq-pcie.
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power-domains:
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items:
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- description: The phandle pointing to the DISPLAY domain for
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imx6sx-pcie, to PCIE_PHY power domain for imx7d-pcie and
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imx8mq-pcie.
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- description: The phandle pointing to the PCIE_PHY power domains
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for imx6sx-pcie.
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power-domain-names:
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items:
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- const: pcie
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- const: pcie_phy
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resets:
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maxItems: 3
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description: Phandles to PCIe-related reset lines exposed by SRC
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IP block. Additional required by imx7d-pcie and imx8mq-pcie.
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reset-names:
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items:
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- const: pciephy
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- const: apps
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- const: turnoff
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fsl,tx-deemph-gen1:
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description: Gen1 De-emphasis value (optional required).
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 0
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fsl,tx-deemph-gen2-3p5db:
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description: Gen2 (3.5db) De-emphasis value (optional required).
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 0
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fsl,tx-deemph-gen2-6db:
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description: Gen2 (6db) De-emphasis value (optional required).
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 20
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fsl,tx-swing-full:
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description: Gen2 TX SWING FULL value (optional required).
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 127
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fsl,tx-swing-low:
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description: TX launch amplitude swing_low value (optional required).
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 127
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fsl,max-link-speed:
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description: Specify PCI Gen for link capability (optional required).
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Note that the IMX6 LVDS clock outputs do not meet gen2 jitter
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requirements and thus for gen2 capability a gen2 compliant clock
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generator should be used and configured.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [1, 2, 3, 4]
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default: 1
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phys:
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maxItems: 1
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phy-names:
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const: pcie-phy
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reset-gpio:
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description: Should specify the GPIO for controlling the PCI bus device
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reset signal. It's not polarity aware and defaults to active-low reset
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sequence (L=reset state, H=operation state) (optional required).
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reset-gpio-active-high:
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description: If present then the reset sequence using the GPIO
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specified in the "reset-gpio" property is reversed (H=reset state,
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L=operation state) (optional required).
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type: boolean
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vpcie-supply:
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description: Should specify the regulator in charge of PCIe port power.
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The regulator will be enabled when initializing the PCIe host and
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disabled either as part of the init process or when shutting down
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the host (optional required).
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vph-supply:
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description: Should specify the regulator in charge of VPH one of
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the three PCIe PHY powers. This regulator can be supplied by both
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1.8v and 3.3v voltage supplies (optional required).
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required:
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- compatible
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- reg
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- reg-names
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- "#address-cells"
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- "#size-cells"
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- device_type
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- bus-range
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- ranges
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- num-lanes
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- interrupts
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- interrupt-names
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- "#interrupt-cells"
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- interrupt-map-mask
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- interrupt-map
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- clocks
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- clock-names
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allOf:
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- $ref: /schemas/pci/snps,dw-pcie.yaml#
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- if:
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properties:
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compatible:
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contains:
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const: fsl,imx6sx-pcie
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then:
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properties:
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clock-names:
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items:
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- {}
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- {}
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- {}
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- const: pcie_inbound_axi
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- if:
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properties:
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compatible:
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contains:
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const: fsl,imx8mq-pcie
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then:
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properties:
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clock-names:
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items:
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- {}
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- {}
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- {}
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- const: pcie_aux
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- if:
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properties:
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compatible:
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not:
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contains:
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enum:
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- fsl,imx6sx-pcie
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- fsl,imx8mq-pcie
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then:
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properties:
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clock-names:
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maxItems: 3
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/imx6qdl-clock.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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pcie: pcie@1ffc000 {
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compatible = "fsl,imx6q-pcie";
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reg = <0x01ffc000 0x04000>,
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<0x01f00000 0x80000>;
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reg-names = "dbi", "config";
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#address-cells = <3>;
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#size-cells = <2>;
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device_type = "pci";
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bus-range = <0x00 0xff>;
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ranges = <0x81000000 0 0 0x01f80000 0 0x00010000>,
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<0x82000000 0 0x01000000 0x01000000 0 0x00f00000>;
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num-lanes = <1>;
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interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "msi";
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#interrupt-cells = <1>;
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interrupt-map-mask = <0 0 0 0x7>;
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interrupt-map = <0 0 0 1 &gpc GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>,
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<0 0 0 2 &gpc GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>,
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<0 0 0 3 &gpc GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>,
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<0 0 0 4 &gpc GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&clks IMX6QDL_CLK_PCIE_AXI>,
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<&clks IMX6QDL_CLK_LVDS1_GATE>,
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<&clks IMX6QDL_CLK_PCIE_REF_125M>;
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clock-names = "pcie", "pcie_bus", "pcie_phy";
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};
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...
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