dt-bindings: clock: Add schema for MSM8909 GCC

The Global Clock Controller (GCC) in the MSM8909 SoC provides clocks,
resets and power domains for the various hardware blocks in the SoC.
Add a DT schema to describe it, similar to other Qualcomm SoCs.

Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220706134132.3623415-2-stephan.gerhold@kernkonzept.com

1 files changed, 58 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-msm8909.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-msm8909.yaml
new file mode 100644
index 000000000000..2272ea5f78d0
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,gcc-msm8909.yaml
@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,gcc-msm8909.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Global Clock & Reset Controller Binding for MSM8909
+
+maintainers:
+  - Stephan Gerhold <stephan@gerhold.net>
+
+description: |
+  Qualcomm global clock control module which supports the clocks, resets and
+  power domains on MSM8909.
+
+  See also:
+  - dt-bindings/clock/qcom,gcc-msm8909.h
+
+properties:
+  compatible:
+    const: qcom,gcc-msm8909
+
+  clocks:
+    items:
+      - description: XO source
+      - description: Sleep clock source
+      - description: DSI phy instance 0 dsi clock
+      - description: DSI phy instance 0 byte clock
+
+  clock-names:
+    items:
+      - const: xo
+      - const: sleep_clk
+      - const: dsi0pll
+      - const: dsi0pllbyte
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+
+allOf:
+  - $ref: qcom,gcc.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    gcc: clock-controller@1800000 {
+      compatible = "qcom,gcc-msm8909";
+      reg = <0x01800000 0x80000>;
+      #clock-cells = <1>;
+      #reset-cells = <1>;
+      #power-domain-cells = <1>;
+      clocks = <&xo_board>, <&sleep_clk>, <&dsi0_phy 1>, <&dsi0_phy 0>;
+      clock-names = "xo", "sleep_clk", "dsi0pll", "dsi0pllbyte";
+    };
+...