linux-kernel - [RFC PATCH 4/6] dt-bindings: PCI: Add SiFive FU740 PCIe host controller

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Message-Id: <4e63c5515f9755d0cf4cd65ab70048554d917d89.1614681831.git.greentime.hu@sifive.com>
Date:   Tue,  2 Mar 2021 18:59:15 +0800
From:   Greentime Hu <greentime.hu@...ive.com>
To:     greentime.hu@...ive.com, paul.walmsley@...ive.com, hes@...ive.com,
        erik.danie@...ive.com, zong.li@...ive.com, bhelgaas@...gle.com,
        robh+dt@...nel.org, palmer@...belt.com, aou@...s.berkeley.edu,
        mturquette@...libre.com, sboyd@...nel.org,
        lorenzo.pieralisi@....com, p.zabel@...gutronix.de,
        alex.dewar90@...il.com, khilman@...libre.com,
        hayashi.kunihiko@...ionext.com, vidyas@...dia.com,
        jh80.chung@...sung.com, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: [RFC PATCH 4/6] dt-bindings: PCI: Add SiFive FU740 PCIe host controller

Add PCIe host controller DT bindings of SiFive FU740.

Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
---
 .../bindings/pci/sifive,fu740-pcie.yaml       | 119 ++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/sifive,fu740-pcie.yaml

diff --git a/Documentation/devicetree/bindings/pci/sifive,fu740-pcie.yaml b/Documentation/devicetree/bindings/pci/sifive,fu740-pcie.yaml
new file mode 100644
index 000000000000..879ab4f80456
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/sifive,fu740-pcie.yaml
@@ -0,0 +1,119 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/sifive,fu740-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive fu740 PCIe host controller
+
+description: |
+  SiFive fu740 PCIe host controller is based on the Synopsys DesignWare
+  PCI core. It shares common features with the PCIe DesignWare core and
+  inherits common properties defined in
+  Documentation/devicetree/bindings/pci/designware-pcie.txt.
+
+maintainers:
+  - Paul Walmsley <paul.walmsley@...ive.com>
+  - Greentime Hu <greentime.hu@...ive.com>
+
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+  compatible:
+    const: sifive,fu740-pcie
+
+  reg:
+    maxItems: 4
+
+  reg-names:
+    items:
+      - const: dbi
+      - const: config
+      - const: mgmt
+
+  device_type:
+    const: pci
+
+  dma-coherent:
+    description: Indicates that the PCIe IP block can ensure the coherency
+
+  bus-range:
+    description: Range of bus numbers associated with this controller.
+
+  num-lanes: true
+
+  msi-parent: true
+
+  interrupt-names:
+    items:
+      - const: msi
+      - const: inta
+      - const: intb
+      - const: intc
+      - const: intd
+
+  resets:
+    description: A phandle to the PCIe power up reset line
+
+  pwren-gpios:
+    description: Should specify the GPIO for controlling the PCI bus device power on
+
+  perstn-gpios:
+    description: Should specify the GPIO for controlling the PCI bus device reset
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - device_type
+  - dma-coherent
+  - bus-range
+  - ranges
+  - num-lanes
+  - interrupts
+  - interrupt-names
+  - interrupt-parent
+  - interrupt-map-mask
+  - interrupt-map
+  - clock-names
+  - clocks
+  - resets
+  - pwren-gpios
+  - perstn-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    pcie@...000000 {
+        #address-cells = <3>;
+        #interrupt-cells = <1>;
+        #size-cells = <2>;
+        compatible = "sifive,fu740-pcie";
+        reg = <0xe 0x00000000 0x1 0x0
+               0xd 0xf0000000 0x0 0x10000000
+               0x0 0x100d0000 0x0 0x1000>;
+        reg-names = "dbi", "config", "mgmt";
+        device_type = "pci";
+        dma-coherent;
+        bus-range = <0x0 0xff>;
+        ranges = <0x81000000  0x0 0x60080000  0x0 0x60080000 0x0 0x10000        /* I/O */
+                  0x82000000  0x0 0x60090000  0x0 0x60090000 0x0 0xff70000      /* mem */
+                  0x82000000  0x0 0x70000000  0x0 0x70000000 0x0 0x1000000      /* mem */
+                  0xc3000000 0x20 0x00000000 0x20 0x00000000 0x20 0x00000000>;  /* mem prefetchable */
+        num-lanes = <0x8>;
+        interrupts = <56 57 58 59 60 61 62 63 64>;
+        interrupt-names = "msi", "inta", "intb", "intc", "intd";
+        interrupt-parent = <&plic0>;
+        interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+        interrupt-map = <0x0 0x0 0x0 0x1 &plic0 57>,
+                        <0x0 0x0 0x0 0x2 &plic0 58>,
+                        <0x0 0x0 0x0 0x3 &plic0 59>,
+                        <0x0 0x0 0x0 0x4 &plic0 60>;
+	clock-names = "pcie_aux";
+        clocks = <&prci PRCI_CLK_PCIE_AUX>;
+        resets = <&prci 4>;
+        pwren-gpios = <&gpio 5 0>;
+        perstn-gpios = <&gpio 8 0>;
+    };
-- 
2.30.0