Add support for i.MX8M PCIe Endpoint modes, and update the MAINTAINER accordingly. Signed-off-by: Richard Zhu <hongxing.zhu@xxxxxxx> --- .../bindings/pci/fsl,imx6q-pcie-ep.yaml | 317 ++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 318 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml new file mode 100644 index 000000000000..7c594ae53067 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml @@ -0,0 +1,317 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/fsl,imx6q-pcie-ep.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale i.MX6 PCIe Endpoint controller + +maintainers: + - Lucas Stach <l.stach@xxxxxxxxxxxxxx> + - Richard Zhu <hongxing.zhu@xxxxxxx> + +description: |+ + This PCIe controller is based on the Synopsys DesignWare PCIe IP and + thus inherits all the common properties defined in snps,dw-pcie-ep.yaml. + The controller instances are dual mode where in they can work either in + Root Port mode or Endpoint mode but one at a time. + +properties: + compatible: + enum: + - fsl,imx8mm-pcie-ep + - fsl,imx8mq-pcie-ep + - fsl,imx8mp-pcie-ep + + reg: + minItems: 2 + + reg-names: + items: + - const: dbi + - const: addr_space + + interrupts: + items: + - description: builtin eDMA interrupter. + + interrupt-names: + items: + - const: dma + + clocks: + minItems: 3 + items: + - description: PCIe bridge clock. + - description: PCIe bus clock. + - description: PCIe PHY clock. + - description: Additional required clock entry for imx6sx-pcie-ep, + imx8mq-pcie-ep. + + clock-names: + minItems: 3 + items: + - const: pcie + - const: pcie_bus + - enum: [ pcie_phy, pcie_aux ] + - enum: [ pcie_inbound_axi, pcie_aux ] + + num-lanes: + const: 1 + + fsl,imx7d-pcie-phy: + $ref: /schemas/types.yaml#/definitions/phandle + description: A phandle to an fsl,imx7d-pcie-phy node. Additional + required properties for imx7d-pcie-ep and imx8mq-pcie-ep. + + power-domains: + minItems: 1 + items: + - description: The phandle pointing to the DISPLAY domain for + imx6sx-pcie-ep, to PCIE_PHY power domain for imx7d-pcie-ep and + imx8mq-pcie-ep. + - description: The phandle pointing to the PCIE_PHY power domains + for imx6sx-pcie-ep. + + power-domain-names: + minItems: 1 + items: + - const: pcie + - const: pcie_phy + + resets: + minItems: 2 + maxItems: 3 + description: Phandles to PCIe-related reset lines exposed by SRC + IP block. Additional required by imx7d-pcie-ep and imx8mq-pcie-ep. + + reset-names: + minItems: 2 + maxItems: 3 + + fsl,tx-deemph-gen1: + description: Gen1 De-emphasis value (optional required). + $ref: /schemas/types.yaml#/definitions/uint32 + default: 0 + + fsl,tx-deemph-gen2-3p5db: + description: Gen2 (3.5db) De-emphasis value (optional required). + $ref: /schemas/types.yaml#/definitions/uint32 + default: 0 + + fsl,tx-deemph-gen2-6db: + description: Gen2 (6db) De-emphasis value (optional required). + $ref: /schemas/types.yaml#/definitions/uint32 + default: 20 + + fsl,tx-swing-full: + description: Gen2 TX SWING FULL value (optional required). + $ref: /schemas/types.yaml#/definitions/uint32 + default: 127 + + fsl,tx-swing-low: + description: TX launch amplitude swing_low value (optional required). + $ref: /schemas/types.yaml#/definitions/uint32 + default: 127 + + fsl,max-link-speed: + description: Specify PCI Gen for link capability (optional required). + Note that the IMX6 LVDS clock outputs do not meet gen2 jitter + requirements and thus for gen2 capability a gen2 compliant clock + generator should be used and configured. + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [1, 2, 3, 4] + default: 1 + + phys: + maxItems: 1 + + phy-names: + const: pcie-phy + + vpcie-supply: + description: Should specify the regulator in charge of PCIe port power. + The regulator will be enabled when initializing the PCIe host and + disabled either as part of the init process or when shutting down + the host (optional required). + + vph-supply: + description: Should specify the regulator in charge of VPH one of + the three PCIe PHY powers. This regulator can be supplied by both + 1.8v and 3.3v voltage supplies (optional required). + +required: + - compatible + - reg + - reg-names + - num-lanes + - interrupts + - interrupt-names + - clocks + - clock-names + +allOf: + - $ref: /schemas/pci/snps,dw-pcie-ep.yaml# + + - if: + properties: + compatible: + contains: + const: fsl,imx6sx-pcie-ep + then: + properties: + clock-names: + items: + - {} + - {} + - const: pcie_phy + - const: pcie_inbound_axi + power-domains: + minItems: 2 + power-domain-names: + minItems: 2 + - if: + properties: + compatible: + contains: + const: fsl,imx8mq-pcie-ep + then: + properties: + clock-names: + items: + - {} + - {} + - const: pcie_phy + - const: pcie_aux + - if: + properties: + compatible: + not: + contains: + enum: + - fsl,imx6sx-pcie-ep + - fsl,imx8mq-pcie-ep + then: + properties: + clocks: + maxItems: 3 + clock-names: + maxItems: 3 + + - if: + properties: + compatible: + contains: + enum: + - fsl,imx6q-pcie-ep + - fsl,imx6qp-pcie-ep + - fsl,imx7d-pcie-ep + then: + properties: + clock-names: + maxItems: 3 + contains: + const: pcie_phy + + - if: + properties: + compatible: + contains: + enum: + - fsl,imx8mm-pcie-ep + - fsl,imx8mp-pcie-ep + then: + properties: + clock-names: + maxItems: 3 + contains: + const: pcie_aux + - if: + properties: + compatible: + contains: + enum: + - fsl,imx6q-pcie-ep + - fsl,imx6qp-pcie-ep + then: + properties: + power-domains: false + power-domain-names: false + + - if: + not: + properties: + compatible: + contains: + enum: + - fsl,imx6sx-pcie-ep + - fsl,imx6q-pcie-ep + - fsl,imx6qp-pcie-ep + then: + properties: + power-domains: + maxItems: 1 + power-domain-names: false + + - if: + properties: + compatible: + contains: + enum: + - fsl,imx6q-pcie-ep + - fsl,imx6sx-pcie-ep + - fsl,imx6qp-pcie-ep + - fsl,imx7d-pcie-ep + - fsl,imx8mq-pcie-ep + then: + properties: + resets: + minItems: 3 + reset-names: + items: + - const: pciephy + - const: apps + - const: turnoff + else: + properties: + resets: + maxItems: 2 + reset-names: + items: + - const: apps + - const: turnoff + +unevaluatedProperties: false + +examples: + - | + #include <dt-bindings/clock/imx8mp-clock.h> + #include <dt-bindings/power/imx8mp-power.h> + #include <dt-bindings/reset/imx8mp-reset.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + + pcie_ep: pcie-ep@33800000 { + compatible = "fsl,imx8mp-pcie-ep"; + reg = <0x33800000 0x000400000>, <0x18000000 0x08000000>; + reg-names = "dbi", "addr_space"; + clocks = <&clk IMX8MP_CLK_HSIO_ROOT>, + <&clk IMX8MP_CLK_HSIO_AXI>, + <&clk IMX8MP_CLK_PCIE_ROOT>; + clock-names = "pcie", "pcie_bus", "pcie_aux"; + assigned-clocks = <&clk IMX8MP_CLK_PCIE_AUX>; + assigned-clock-rates = <10000000>; + assigned-clock-parents = <&clk IMX8MP_SYS_PLL2_50M>; + num-lanes = <1>; + interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>; /* eDMA */ + interrupt-names = "dma"; + fsl,max-link-speed = <3>; + power-domains = <&hsio_blk_ctrl IMX8MP_HSIOBLK_PD_PCIE>; + resets = <&src IMX8MP_RESET_PCIE_CTRL_APPS_EN>, + <&src IMX8MP_RESET_PCIE_CTRL_APPS_TURNOFF>; + reset-names = "apps", "turnoff"; + phys = <&pcie_phy>; + phy-names = "pcie-phy"; + num-ib-windows = <4>; + num-ob-windows = <4>; + status = "disabled"; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 5dce1c45f4d1..663a0d5960d8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15997,6 +15997,7 @@ M: Lucas Stach <l.stach@xxxxxxxxxxxxxx> L: linux-pci@xxxxxxxxxxxxxxx L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers) S: Maintained +F: Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml F: Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml F: drivers/pci/controller/dwc/*imx6* -- 2.34.1
