linux-kernel - [PATCH v7 08/13] dt-bindings: PCI: Add CIX Sky1 PCIe Root Complex bindings

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Message-ID: <20250813042331.1258272-9-hans.zhang@cixtech.com>
Date: Wed, 13 Aug 2025 12:23:26 +0800
From: hans.zhang@...tech.com
To: bhelgaas@...gle.com,
	lpieralisi@...nel.org,
	kw@...ux.com,
	mani@...nel.org,
	robh@...nel.org,
	kwilczynski@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: mpillai@...ence.com,
	fugang.duan@...tech.com,
	guoyin.chen@...tech.com,
	peter.chen@...tech.com,
	cix-kernel-upstream@...tech.com,
	linux-pci@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hans Zhang <hans.zhang@...tech.com>
Subject: [PATCH v7 08/13] dt-bindings: PCI: Add CIX Sky1 PCIe Root Complex bindings

From: Hans Zhang <hans.zhang@...tech.com>

Document the bindings for CIX Sky1 PCIe Controller configured in
root complex mode with five root port.

Supports 4 INTx, MSI and MSI-x interrupts from the ARM GICv3 controller.

Signed-off-by: Hans Zhang <hans.zhang@...tech.com>
---
 .../bindings/pci/cix,sky1-pcie-host.yaml      | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/cix,sky1-pcie-host.yaml

diff --git a/Documentation/devicetree/bindings/pci/cix,sky1-pcie-host.yaml b/Documentation/devicetree/bindings/pci/cix,sky1-pcie-host.yaml
new file mode 100644
index 000000000000..2bd66603ac24
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/cix,sky1-pcie-host.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/cix,sky1-pcie-host.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: CIX Sky1 PCIe Root Complex
+
+maintainers:
+  - Hans Zhang <hans.zhang@...tech.com>
+
+description:
+  PCIe root complex controller based on the Cadence PCIe core.
+
+allOf:
+  - $ref: /schemas/pci/pci-host-bridge.yaml#
+
+properties:
+  compatible:
+    const: cix,sky1-pcie-host
+
+  reg:
+    items:
+      - description: PCIe controller registers.
+      - description: ECAM registers.
+      - description: Remote CIX System Unit registers.
+      - description: Region for sending messages registers.
+
+  reg-names:
+    items:
+      - const: reg
+      - const: cfg
+      - const: rcsu
+      - const: msg
+
+  ranges:
+    maxItems: 3
+
+required:
+  - compatible
+  - ranges
+  - bus-range
+  - device_type
+  - interrupt-map
+  - interrupt-map-mask
+  - msi-map
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    / {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      pcie@...0000 {
+          compatible = "cix,sky1-pcie-host";
+          reg = <0x00 0x0a010000 0x00 0x10000>,
+                <0x00 0x2c000000 0x00 0x4000000>,
+                <0x00 0x0a000000 0x00 0x10000>,
+                <0x00 0x60000000 0x00 0x00100000>;
+          reg-names = "reg", "cfg", "rcsu", "msg";
+          ranges = <0x01000000 0x00 0x60100000 0x00 0x60100000 0x00 0x00100000>,
+                  <0x02000000 0x00 0x60200000 0x00 0x60200000 0x00 0x1fe00000>,
+                  <0x43000000 0x18 0x00000000 0x18 0x00000000 0x04 0x00000000>;
+          #address-cells = <3>;
+          #size-cells = <2>;
+          bus-range = <0xc0 0xff>;
+          device_type = "pci";
+          #interrupt-cells = <1>;
+          interrupt-map-mask = <0 0 0 0x7>;
+          interrupt-map = <0 0 0 1 &gic 0 0 GIC_SPI 407 IRQ_TYPE_LEVEL_HIGH 0>,
+                          <0 0 0 2 &gic 0 0 GIC_SPI 408 IRQ_TYPE_LEVEL_HIGH 0>,
+                          <0 0 0 3 &gic 0 0 GIC_SPI 409 IRQ_TYPE_LEVEL_HIGH 0>,
+                          <0 0 0 4 &gic 0 0 GIC_SPI 410 IRQ_TYPE_LEVEL_HIGH 0>;
+          msi-map = <0xc000 &gic_its 0xc000 0x4000>;
+      };
+    };
-- 
2.49.0