Add Eswin EIC7700 PCIe driver

Documentation/devicetree/bindings/pci/eswin,eic7700-pcie.yaml

@@ -0,0 +1,138 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/eswin,eic7700-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Eswin EIC7700 PCIe host controller
+
+maintainers:
+  - Yu Ning <ningyu@eswincomputing.com>
+  - Senchuan Zhang <zhangsenchuan@eswincomputing.com>
+
+description:
+  The PCIe controller on EIC7700 SoC.
+
+allOf:
+  - $ref: /schemas/pci/pci-host-bridge.yaml#
+
+properties:
+  compatible:
+    const: eswin,eic7700-pcie
+
+  reg:
+    maxItems: 3
+
+  reg-names:
+    items:
+      - const: dbi
+      - const: config
+      - const: mgmt
+
+  '#interrupt-cells':
+    const: 1
+
+  interrupts:
+    minItems: 9
+    maxItems: 9
+
+  interrupt-names:
+    items:
+      - const: msi
+      - const: inta
+      - const: intb
+      - const: intc
+      - const: intd
+
+  interrupt-controller:
+    type: object
+
+  interrupt-map:
+    maxItems: 4
+
+  interrupt-map-mask:
+    items:
+      - const: 0
+      - const: 0
+      - const: 0
+      - const: 7
+
+  clocks:
+    maxItems: 4
+
+  clock-names:
+    items:
+      - const: aclk
+      - const: cfg
+      - const: cr
+      - const: aux
+
+  resets:
+    minItems: 1
+    maxItems: 3
+
+  reset-names:
+    items:
+      - const: cfg
+      - const: powerup
+      - const: pwren
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - interrupt-names
+  - interrupt-map-mask
+  - interrupt-map
+  - '#interrupt-cells'
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        pcie: pcie@54000000 {
+            compatible = "eswin,eic7700-pcie";
+            reg = <0x0 0x54000000 0x0 0x4000000>,
+                <0x0 0x40000000 0x0 0x800000>,
+                <0x0 0x50000000 0x0 0x100000>;
+            reg-names = "dbi", "config", "mgmt";
+            ranges = <0x81000000 0x0 0x40800000 0x0 0x40800000 0x0 0x800000>,
+                    <0x82000000 0x0 0x41000000 0x0 0x41000000 0x0 0xf000000>,
+                    <0xc3000000 0x80 0x00000000 0x80 0x00000000 0x2 0x00000000>;
+
+            bus-range = <0x0 0xff>;
+            device_type = "pci";
+            num-lanes = <0x4>;
+
+            clocks = <&clock 562>,
+                    <&clock 563>,
+                    <&clock 564>,
+                    <&clock 565>;
+            clock-names = "aclk", "cfg", "cr", "aux";
+            reset-names = "cfg", "powerup", "pwren";
+            resets = <&reset 8 (1 << 0)>,
+                    <&reset 8 (1 << 1)>,
+                    <&reset 8 (1 << 2)>;
+
+            #address-cells = <3>;
+            #size-cells = <2>;
+            #interrupt-cells = <1>;
+            interrupts = <220>, <179>, <180>, <181>, <182>;
+            interrupt-names = "msi", "inta", "intb", "intc", "intd";
+            interrupt-parent = <&plic>;
+            interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+            interrupt-map = <0x0 0x0 0x0 0x1 &plic 179>,
+                            <0x0 0x0 0x0 0x2 &plic 180>,
+                            <0x0 0x0 0x0 0x3 &plic 181>,
+                            <0x0 0x0 0x0 0x4 &plic 182>;
+          };
+    };

drivers/pci/controller/dwc/Kconfig

@@ -480,4 +480,16 @@ config PCIE_VISCONTI_HOST
 	  Say Y here if you want PCIe controller support on Toshiba Visconti SoC.
 	  This driver supports TMPV7708 SoC.
 
+config PCIE_EIC7700
+	tristate "ESWIN PCIe host controller"
+	depends on PCI_MSI
+	depends on ARCH_ESWIN || COMPILE_TEST
+	select PCIE_DW_HOST
+	help
+      Enables support for the PCIe controller in the Eswin SoC
+      The PCI controller on Eswin is based on DesignWare hardware
+      It is a high-speed hardware bus standard used to connect
+      processors with external devices. Say Y here if you want
+      PCIe controller support for the ESWIN.
+
 endmenu

drivers/pci/controller/dwc/Makefile

@@ -30,6 +30,7 @@ obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
 obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
 obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o
 obj-$(CONFIG_PCIE_RCAR_GEN4) += pcie-rcar-gen4.o
+obj-$(CONFIG_PCIE_EIC7700) += pcie-eic7700.o
 
 # The following drivers are for devices that use the generic ACPI
 # pci_root.c driver but don't support standard ECAM config access.