dt-bindings: phy: Add starfive,jh7110-dphy-tx

StarFive SoCs like the jh7110 use a MIPI D-PHY TX
controller based on a M31 IP. Add a binding for it.
Signed-off-by: Shengyang Chen <shengyang.chen@starfivetech.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240418035020.47876-2-shengyang.chen@starfivetech.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-tx.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/starfive,jh7110-dphy-tx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Starfive SoC MIPI D-PHY Tx Controller
+
+maintainers:
+  - Keith Zhao <keith.zhao@starfivetech.com>
+  - Shengyang Chen <shengyang.chen@starfivetech.com>
+
+description:
+  The Starfive SoC uses the MIPI DSI D-PHY based on M31 IP to transfer
+  DSI data.
+
+properties:
+  compatible:
+    const: starfive,jh7110-dphy-tx
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: txesc
+
+  resets:
+    items:
+      - description: MIPITX_DPHY_SYS reset
+
+  reset-names:
+    items:
+      - const: sys
+
+  power-domains:
+    maxItems: 1
+
+  "#phy-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+  - power-domains
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    phy@295e0000 {
+      compatible = "starfive,jh7110-dphy-tx";
+      reg = <0x295e0000 0x10000>;
+      clocks = <&voutcrg 14>;
+      clock-names = "txesc";
+      resets = <&syscrg 10>;
+      reset-names = "sys";
+      power-domains = <&aon_syscon 0>;
+      #phy-cells = <0>;
+    };