dt-bindings: phy: qcom,uniphy-pcie: Document PCIe uniphy

Document the Qualcomm UNIPHY PCIe 28LP present in IPQ5332.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nitheesh Sekar <quic_nsekar@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Link: https://lore.kernel.org/r/20250220094251.230936-2-quic_varada@quicinc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/Documentation/devicetree/bindings/phy/qcom,ipq5332-uniphy-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,ipq5332-uniphy-pcie-phy.yaml
new file mode 100644 (file)
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@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/qcom,ipq5332-uniphy-pcie-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm UNIPHY PCIe 28LP PHY
+
+maintainers:
+  - Nitheesh Sekar <quic_nsekar@quicinc.com>
+  - Varadarajan Narayanan <quic_varada@quicinc.com>
+
+description:
+  PCIe and USB combo PHY found in Qualcomm IPQ5332 SoC
+
+properties:
+  compatible:
+    enum:
+      - qcom,ipq5332-uniphy-pcie-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: pcie pipe clock
+      - description: pcie ahb clock
+
+  resets:
+    items:
+      - description: phy reset
+      - description: ahb reset
+      - description: cfg reset
+
+  "#phy-cells":
+    const: 0
+
+  "#clock-cells":
+    const: 0
+
+  num-lanes:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 2]
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+  - "#phy-cells"
+  - "#clock-cells"
+  - num-lanes
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,ipq5332-gcc.h>
+
+    pcie0_phy: phy@4b0000 {
+        compatible = "qcom,ipq5332-uniphy-pcie-phy";
+        reg = <0x004b0000 0x800>;
+
+        clocks = <&gcc GCC_PCIE3X1_0_PIPE_CLK>,
+                 <&gcc GCC_PCIE3X1_PHY_AHB_CLK>;
+
+        resets = <&gcc GCC_PCIE3X1_0_PHY_BCR>,
+                 <&gcc GCC_PCIE3X1_PHY_AHB_CLK_ARES>,
+                 <&gcc GCC_PCIE3X1_0_PHY_PHY_BCR>;
+
+        #clock-cells = <0>;
+
+        #phy-cells = <0>;
+
+        num-lanes = <1>;
+    };