Add YAML schema for the device tree bindings for DSI PHY.

Signed-off-by: Krishna Manikandan <redacted>

Changes in v1:
   - Merge dsi-phy.yaml and dsi-phy-10nm.yaml (Stephen Boyd)
   - Remove qcom,dsi-phy-regulator-ldo-mode (Stephen Boyd)
   - Add clock cells properly (Stephen Boyd)
   - Remove unnecessary decription from clock names (Stephen Boyd)
   - Add pin names for the supply entries for 10nm phy which is
     used in sc7180 and sdm845 (Stephen Boyd)
   - Remove unused header files from examples (Stephen Boyd)
   - Drop labels for display nodes and correct node name (Stephen Boyd)

Changes in v2:
   - Drop maxItems for clock (Stephen Boyd)
   - Add vdds supply pin information for sdm845 (Stephen Boyd)
   - Add examples for 14nm, 20nm and 28nm phy yaml files (Stephen Boyd)
   - Keep child nodes directly under soc node (Stephen Boyd)

Changes in v3:
   - Use a separate yaml file to describe the common properties
     for all the dsi phy versions (Stephen Boyd)
   - Remove soc from examples (Stephen Boyd)
   - Add description for register property

Changes in v4:
   - Modify the title for all the phy versions (Stephen Boyd)
   - Drop description for all the phy versions (Stephen Boyd)
   - Modify the description for register property (Stephen Boyd)

Changes in v5:
   - Remove unused properties from common dsi phy file
   - Add clock-cells and phy-cells to required property
     list (Stephen Boyd)

Changes in v6:
   - Add proper compatible string in example
---
 .../bindings/display/msm/dsi-phy-10nm.yaml         | 68 +++++++++++++++++++++
 .../bindings/display/msm/dsi-phy-14nm.yaml         | 66 ++++++++++++++++++++
 .../bindings/display/msm/dsi-phy-20nm.yaml         | 71 ++++++++++++++++++++++
 .../bindings/display/msm/dsi-phy-28nm.yaml         | 68 +++++++++++++++++++++
 .../bindings/display/msm/dsi-phy-common.yaml       | 40 ++++++++++++
 5 files changed, 313 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-phy-10nm.yaml
 create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-phy-14nm.yaml
 create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-phy-20nm.yaml
 create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-phy-28nm.yaml
 create mode 100644 Documentation/devicetree/bindings/display/msm/dsi-phy-common.yaml

diff --git a/Documentation/devicetree/bindings/display/msm/dsi-phy-10nm.yaml b/Documentation/devicetree/bindings/display/msm/dsi-phy-10nm.yaml
new file mode 100644
index 0000000..4a26bef
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/msm/dsi-phy-10nm.yaml

@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/msm/dsi-phy-10nm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Display DSI 10nm PHY
+
+maintainers:
+  - Krishna Manikandan <mkrishn@codeaurora.org>
+
+allOf:
+  - $ref: dsi-phy-common.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: qcom,dsi-phy-10nm
+      - const: qcom,dsi-phy-10nm-8998
+
+  reg:
+    items:
+      - description: dsi phy register set
+      - description: dsi phy lane register set
+      - description: dsi pll register set
+
+  reg-names:
+    items:
+      - const: dsi_phy
+      - const: dsi_phy_lane
+      - const: dsi_pll
+
+  vdds-supply:
+    description: |
+      Connected to DSI0_MIPI_DSI_PLL_VDDA0P9 pin for sc7180 target and
+      connected to VDDA_MIPI_DSI_0_PLL_0P9 pin for sdm845 target