dt-bindings: clock: Add SM8250 GCC clock bindings

Add device tree bindings for global clock controller on SM8250 SoCs.
Signed-off-by: Taniya Das <tdas@codeaurora.org>
Signed-off-by: Venkata Narendra Kumar Gutta <vnkgutta@codeaurora.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lkml.kernel.org/r/20200224045003.3783838-5-vkoul@kernel.orgReviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/qcom,gcc-sm8250.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,gcc-sm8250.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Global Clock & Reset Controller Binding for SM8250
+
+maintainers:
+  - Stephen Boyd <sboyd@kernel.org>
+  - Taniya Das <tdas@codeaurora.org>
+
+description: |
+  Qualcomm global clock control module which supports the clocks, resets and
+  power domains on SM8250.
+
+  See also:
+  - dt-bindings/clock/qcom,gcc-sm8250.h
+
+properties:
+  compatible:
+    const: qcom,gcc-sm8250
+
+  clocks:
+    items:
+      - description: Board XO source
+      - description: Sleep clock source
+
+  clock-names:
+    items:
+      - const: bi_tcxo
+      - const: sleep_clk
+
+  '#clock-cells':
+    const: 1
+
+  '#reset-cells':
+    const: 1
+
+  '#power-domain-cells':
+    const: 1
+
+  reg:
+    maxItems: 1
+
+  protected-clocks:
+    description:
+      Protected clock specifier list as per common clock binding.
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - reg
+  - '#clock-cells'
+  - '#reset-cells'
+  - '#power-domain-cells'
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,rpmh.h>
+    clock-controller@100000 {
+      compatible = "qcom,gcc-sm8250";
+      reg = <0 0x00100000 0 0x1f0000>;
+      clocks = <&rpmhcc RPMH_CXO_CLK>,
+               <&sleep_clk>;
+      clock-names = "bi_tcxo", "sleep_clk";
+      #clock-cells = <1>;
+      #reset-cells = <1>;
+      #power-domain-cells = <1>;
+    };
+...