linux-arkmicro/linux/Documentation/devicetree/bindings/pci/qcom,pcie.txt

* Qualcomm PCI express root complex

- compatible:
	Usage: required
	Value type: <stringlist>
	Definition: Value should contain
			- "qcom,pcie-ipq8064" for ipq8064
			- "qcom,pcie-apq8064" for apq8064
			- "qcom,pcie-apq8084" for apq8084
			- "qcom,pcie-msm8996" for msm8996 or apq8096
			- "qcom,pcie-ipq4019" for ipq4019
			- "qcom,pcie-ipq8074" for ipq8074

- reg:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: Register ranges as listed in the reg-names property

- reg-names:
	Usage: required
	Value type: <stringlist>
	Definition: Must include the following entries
			- "parf"   Qualcomm specific registers
			- "dbi"	   DesignWare PCIe registers
			- "elbi"   External local bus interface registers
			- "config" PCIe configuration space

- device_type:
	Usage: required
	Value type: <string>
	Definition: Should be "pci". As specified in designware-pcie.txt

- #address-cells:
	Usage: required
	Value type: <u32>
	Definition: Should be 3. As specified in designware-pcie.txt

- #size-cells:
	Usage: required
	Value type: <u32>
	Definition: Should be 2. As specified in designware-pcie.txt

- ranges:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: As specified in designware-pcie.txt

- interrupts:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: MSI interrupt

- interrupt-names:
	Usage: required
	Value type: <stringlist>
	Definition: Should contain "msi"

- #interrupt-cells:
	Usage: required
	Value type: <u32>
	Definition: Should be 1. As specified in designware-pcie.txt

- interrupt-map-mask:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: As specified in designware-pcie.txt

- interrupt-map:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: As specified in designware-pcie.txt

- clocks:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: List of phandle and clock specifier pairs as listed
		    in clock-names property

- clock-names:
	Usage: required
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "iface"	Configuration AHB clock

- clock-names:
	Usage: required for ipq/apq8064
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "core"	Clocks the pcie hw block
			- "phy"		Clocks the pcie PHY block
- clock-names:
	Usage: required for apq8084/ipq4019
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "aux"		Auxiliary (AUX) clock
			- "bus_master"	Master AXI clock
			- "bus_slave"	Slave AXI clock

- clock-names:
	Usage: required for msm8996/apq8096
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "pipe"	Pipe Clock driving internal logic
			- "aux"		Auxiliary (AUX) clock
			- "cfg"		Configuration clock
			- "bus_master"	Master AXI clock
			- "bus_slave"	Slave AXI clock

- clock-names:
	Usage: required for ipq8074
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "iface"	PCIe to SysNOC BIU clock
			- "axi_m"	AXI Master clock
			- "axi_s"	AXI Slave clock
			- "ahb"		AHB clock
			- "aux"		Auxiliary clock

- resets:
	Usage: required
	Value type: <prop-encoded-array>
	Definition: List of phandle and reset specifier pairs as listed
		    in reset-names property

- reset-names:
	Usage: required for ipq/apq8064
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "axi"  AXI reset
			- "ahb"  AHB reset
			- "por"  POR reset
			- "pci"  PCI reset
			- "phy"  PHY reset

- reset-names:
	Usage: required for apq8084
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "core" Core reset

- reset-names:
	Usage: required for ipq/apq8064
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "axi_m"		AXI master reset
			- "axi_s"		AXI slave reset
			- "pipe"		PIPE reset
			- "axi_m_vmid"		VMID reset
			- "axi_s_xpu"		XPU reset
			- "parf"		PARF reset
			- "phy"			PHY reset
			- "axi_m_sticky"	AXI sticky reset
			- "pipe_sticky"		PIPE sticky reset
			- "pwr"			PWR reset
			- "ahb"			AHB reset
			- "phy_ahb"		PHY AHB reset

- reset-names:
	Usage: required for ipq8074
	Value type: <stringlist>
	Definition: Should contain the following entries
			- "pipe"		PIPE reset
			- "sleep"		Sleep reset
			- "sticky"		Core Sticky reset
			- "axi_m"		AXI Master reset
			- "axi_s"		AXI Slave reset
			- "ahb"			AHB Reset
			- "axi_m_sticky"	AXI Master Sticky reset

- power-domains:
	Usage: required for apq8084 and msm8996/apq8096
	Value type: <prop-encoded-array>
	Definition: A phandle and power domain specifier pair to the
		    power domain which is responsible for collapsing
		    and restoring power to the peripheral

- vdda-supply:
	Usage: required
	Value type: <phandle>
	Definition: A phandle to the core analog power supply

- vdda_phy-supply:
	Usage: required for ipq/apq8064
	Value type: <phandle>
	Definition: A phandle to the analog power supply for PHY

- vdda_refclk-supply:
	Usage: required for ipq/apq8064
	Value type: <phandle>
	Definition: A phandle to the analog power supply for IC which generates
		    reference clock
- vddpe-3v3-supply:
	Usage: optional
	Value type: <phandle>
	Definition: A phandle to the PCIe endpoint power supply

- phys:
	Usage: required for apq8084
	Value type: <phandle>
	Definition: List of phandle(s) as listed in phy-names property

- phy-names:
	Usage: required for apq8084
	Value type: <stringlist>
	Definition: Should contain "pciephy"

- <name>-gpios:
	Usage: optional
	Value type: <prop-encoded-array>
	Definition: List of phandle and GPIO specifier pairs. Should contain
			- "perst-gpios"	PCIe endpoint reset signal line
			- "wake-gpios"	PCIe endpoint wake signal line

* Example for ipq/apq8064
	pcie@1b500000 {
		compatible = "qcom,pcie-apq8064", "qcom,pcie-ipq8064", "snps,dw-pcie";
		reg = <0x1b500000 0x1000
		       0x1b502000 0x80
		       0x1b600000 0x100
		       0x0ff00000 0x100000>;
		reg-names = "dbi", "elbi", "parf", "config";
		device_type = "pci";
		linux,pci-domain = <0>;
		bus-range = <0x00 0xff>;
		num-lanes = <1>;
		#address-cells = <3>;
		#size-cells = <2>;
		ranges = <0x81000000 0 0 0x0fe00000 0 0x00100000   /* I/O */
			  0x82000000 0 0 0x08000000 0 0x07e00000>; /* memory */
		interrupts = <GIC_SPI 238 IRQ_TYPE_NONE>;
		interrupt-names = "msi";
		#interrupt-cells = <1>;
		interrupt-map-mask = <0 0 0 0x7>;
		interrupt-map = <0 0 0 1 &intc 0 36 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
				<0 0 0 2 &intc 0 37 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
				<0 0 0 3 &intc 0 38 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
				<0 0 0 4 &intc 0 39 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
		clocks = <&gcc PCIE_A_CLK>,
			 <&gcc PCIE_H_CLK>,
			 <&gcc PCIE_PHY_CLK>;
		clock-names = "core", "iface", "phy";
		resets = <&gcc PCIE_ACLK_RESET>,
			 <&gcc PCIE_HCLK_RESET>,
			 <&gcc PCIE_POR_RESET>,
			 <&gcc PCIE_PCI_RESET>,
			 <&gcc PCIE_PHY_RESET>;
		reset-names = "axi", "ahb", "por", "pci", "phy";
		pinctrl-0 = <&pcie_pins_default>;
		pinctrl-names = "default";
	};

* Example for apq8084
	pcie0@fc520000 {
		compatible = "qcom,pcie-apq8084", "snps,dw-pcie";
		reg = <0xfc520000 0x2000>,
		      <0xff000000 0x1000>,
		      <0xff001000 0x1000>,
		      <0xff002000 0x2000>;
		reg-names = "parf", "dbi", "elbi", "config";
		device_type = "pci";
		linux,pci-domain = <0>;
		bus-range = <0x00 0xff>;
		num-lanes = <1>;
		#address-cells = <3>;
		#size-cells = <2>;
		ranges = <0x81000000 0 0          0xff200000 0 0x00100000   /* I/O */
			  0x82000000 0 0x00300000 0xff300000 0 0x00d00000>; /* memory */
		interrupts = <GIC_SPI 243 IRQ_TYPE_NONE>;
		interrupt-names = "msi";
		#interrupt-cells = <1>;
		interrupt-map-mask = <0 0 0 0x7>;
		interrupt-map = <0 0 0 1 &intc 0 244 IRQ_TYPE_LEVEL_HIGH>, /* int_a */
				<0 0 0 2 &intc 0 245 IRQ_TYPE_LEVEL_HIGH>, /* int_b */
				<0 0 0 3 &intc 0 247 IRQ_TYPE_LEVEL_HIGH>, /* int_c */
				<0 0 0 4 &intc 0 248 IRQ_TYPE_LEVEL_HIGH>; /* int_d */
		clocks = <&gcc GCC_PCIE_0_CFG_AHB_CLK>,
			 <&gcc GCC_PCIE_0_MSTR_AXI_CLK>,
			 <&gcc GCC_PCIE_0_SLV_AXI_CLK>,
			 <&gcc GCC_PCIE_0_AUX_CLK>;
		clock-names = "iface", "master_bus", "slave_bus", "aux";
		resets = <&gcc GCC_PCIE_0_BCR>;
		reset-names = "core";
		power-domains = <&gcc PCIE0_GDSC>;
		vdda-supply = <&pma8084_l3>;
		phys = <&pciephy0>;
		phy-names = "pciephy";
		perst-gpio = <&tlmm 70 GPIO_ACTIVE_LOW>;
		pinctrl-0 = <&pcie0_pins_default>;
		pinctrl-names = "default";
	};