[PATCH 1/2] dt-bindings: phy: realtek: Add Realtek DHC RTD SoC PCIe PHY

[Tzuyi Chang]

Add the device tree bindings for the Realtek DHC(Digital Home Center)
RTD SoCs PCIe PHY.

Signed-off-by: Tzuyi Chang <tychang@xxxxxxxxxxx>
---
 .../bindings/phy/realtek,rtd-pcie-phy.yaml    | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/realtek,rtd-pcie-phy.yaml

diff --git a/Documentation/devicetree/bindings/phy/realtek,rtd-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/realtek,rtd-pcie-phy.yaml
new file mode 100644
index 000000000000..44ff23f698e6
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/realtek,rtd-pcie-phy.yaml
@@ -0,0 +1,61 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2023 Realtek Semiconductor Corporation
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/realtek,rtd-pcie-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Realtek DHC PCIe PHY
+
+maintainers:
+  - Tzuyi Chang <tychang@xxxxxxxxxxx>
+
+description:
+  Realtek PCIe PHY supports the DHC(Digital Home Center) RTD series SoCs.
+  The PCIe PHY driver is designed to support physical layer functionality
+  of the PCIe controller.
+
+properties:
+  compatible:
+    enum:
+      - realtek,rtd1319-pcie0-phy
+      - realtek,rtd1319-pcie1-phy
+      - realtek,rtd1319-pcie2-phy
+      - realtek,rtd1619b-pcie1-phy
+      - realtek,rtd1619b-pcie2-phy
+      - realtek,rtd1319d-pcie1-phy
+      - realtek,rtd1315e-pcie1-phy
+
+  "#phy-cells":
+    const: 0
+
+  nvmem-cells:
+    maxItems: 1
+    description:
+      Phandle to nvmem cell that contains 'Tx swing trim'
+      tuning parameter value for PCIe phy.
+
+  nvmem-cell-names:
+    items:
+      - const: tx_swing_trim
+
+  realtek,pcie-syscon:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: phandle of syscon used to control PCIe MDIO register.
+
+required:
+  - compatible
+  - realtek,pcie-syscon
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    pcie1_phy {
+        compatible = "realtek,rtd1319d-pcie1-phy";
+        realtek,pcie-syscon = <&pcie1>;
+        #phy-cells = <0>;
+        nvmem-cells = <&otp_pcie_tx_swing_trim>;
+        nvmem-cell-names = "tx_swing_trim";
+    };
-- 
2.43.0