Add device tree binding documentation for the ASPEED AST2600/AST2700 PCIe configuration syscon block. This shared register space is used by multiple PCIe-related devices to coordinate and manage common PCIe settings. The binding describes the required compatible strings and register space for the configuration node. Signed-off-by: Jacky Chou <jacky_chou@xxxxxxxxxxxxxx> --- .../bindings/pci/aspeed-pcie-cfg.yaml | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/aspeed-pcie-cfg.yaml diff --git a/Documentation/devicetree/bindings/pci/aspeed-pcie-cfg.yaml b/Documentation/devicetree/bindings/pci/aspeed-pcie-cfg.yaml new file mode 100644 index 000000000000..6b51eedf4c47 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/aspeed-pcie-cfg.yaml @@ -0,0 +1,41 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/pci/aspeed-pcie-cfg.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ASPEED PCIe Configuration + +maintainers: + - Jacky Chou <jacky_chou@xxxxxxxxxxxxxx> + +description: | + The ASPEED PCIe configuration syscon block provides a set of registers shared + by multiple PCIe-related devices within the SoC. This node represents the + common configuration space that allows these devices to coordinate and manage + shared PCIe settings, including address mapping, control, and status + registers. The syscon interface enables Linux drivers for various PCIe devices + to access and modify these shared registers in a consistent and centralized + manner. + +properties: + compatible: + enum: + - aspeed,ast2600-pcie-cfg + - aspeed,ast2700-pcie-cfg + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + pcie-cfg@1e770000 { + compatible = "aspeed,ast2600-pcie-cfg"; + reg = <0x1e770000 0x80>; + }; -- 2.43.0
