linux-kernel - [PATCH 1/2] dt-bindings: PCI: sprd: Document Unisoc PCIe RC host controller

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Date:   Fri, 21 Aug 2020 17:51:48 +0800
From:   Hongtao Wu <wuht06@...il.com>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Billows Wu <billows.wu@...soc.com>
Subject: [PATCH 1/2] dt-bindings: PCI: sprd: Document Unisoc PCIe RC host controller

From: Billows Wu <billows.wu@...soc.com>

This series adds PCIe bindings for Uisoc SoCs.
This controller is based on DesignWare PCIe IP.

Signed-off-by: Billows Wu <billows.wu@...soc.com>
---
 .../devicetree/bindings/pci/sprd-pcie.yaml         | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/sprd-pcie.yaml

diff --git a/Documentation/devicetree/bindings/pci/sprd-pcie.yaml b/Documentation/devicetree/bindings/pci/sprd-pcie.yaml
new file mode 100644
index 0000000..6eab4b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/sprd-pcie.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/sprd-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SoC PCIe Host Controller Device Tree Bindings
+
+maintainers:
+  - Billows Wu <billows.wu@...soc.com>
+
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+  - $ref: "sprd-pcie.yaml#"
+
+properties:
+  compatible:
+    items:
+      - const: sprd,pcie
+      - const: sprd,pcie-ep
+
+  reg:
+    minItems: 2
+    maxItems: 3
+    items:
+      - description: Controller control and status registers.
+      - description: PCIe shadow registers.
+      - description: PCIe configuration registers.
+
+  reg-names:
+    items:
+      - const: dbi
+      - const: dbi2
+      - const: cfg
+
+  ranges:
+    maxItems: 2
+
+  num-lanes:
+    maxItems: 1
+    description: Number of lanes to use for this port.
+
+  num-ib-windows:
+    maxItems: 1
+    description: Number of inbound windows to use for this port.
+
+  num-ob-windows:
+    maxItems: 1
+    description: Number of outbound windows to use for this port.
+
+  bus-range:
+    description: Range of bus numbers associated with this controller.
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - num-lanes
+  - ranges
+  - bus-range
+  - interrupts
+  - interrupt-names
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    pcie0@...00000 {
+        compatible = "sprd,pcie", "snps,dw-pcie";
+        reg = <0x0 0x2b100000 0x0 0x2000>,
+              <0x2 0x00000000 0x0 0x2000>;
+        reg-names = "dbi", "config";
+        #address-cells = <3>;
+        #size-cells = <2>;
+        device_type = "pci";
+        ranges = <0x01000000 0x0 0x00000000 0x2 0x00002000 0x0 0x00010000
+                  0x03000000 0x0 0x10000000 0x2 0x10000000 0x1 0xefffffff>;
+        bus-range = <0  15>;
+        num-lanes = <1>;
+        num-viewport = <8>;
+        interrupts = <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-names = "msi";
+    };
--
2.7.4