dt-bindings: clock: Convert i.MX8QXP LPCG to json-schema

Convert the i.MX8QXP LPCG binding to DT schema format using json-schema.

Signed-off-by: Anson Huang <[email protected]>
[robh: add additionalProperties]
Signed-off-by: Rob Herring <[email protected]>

Author: Anson-Huang

Documentation/devicetree/bindings/clock/imx8qxp-lpcg.txt

@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/imx8qxp-lpcg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX8QXP LPCG (Low-Power Clock Gating) Clock bindings
+
+maintainers:
+  - Aisheng Dong <[email protected]>
+
+description: |
+  The Low-Power Clock Gate (LPCG) modules contain a local programming
+  model to control the clock gates for the peripherals. An LPCG module
+  is used to locally gate the clocks for the associated peripheral.
+
+  This level of clock gating is provided after the clocks are generated
+  by the SCU resources and clock controls. Thus even if the clock is
+  enabled by these control bits, it might still not be running based
+  on the base resource.
+
+  The clock consumer should specify the desired clock by having the clock
+  ID in its "clocks" phandle cell. See the full list of clock IDs from:
+  include/dt-bindings/clock/imx8-clock.h
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx8qxp-lpcg-adma
+      - fsl,imx8qxp-lpcg-conn
+      - fsl,imx8qxp-lpcg-dc
+      - fsl,imx8qxp-lpcg-dsp
+      - fsl,imx8qxp-lpcg-gpu
+      - fsl,imx8qxp-lpcg-hsio
+      - fsl,imx8qxp-lpcg-img
+      - fsl,imx8qxp-lpcg-lsio
+      - fsl,imx8qxp-lpcg-vpu
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8-clock.h>
+    #include <dt-bindings/firmware/imx/rsrc.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    clock-controller@5b200000 {
+        compatible = "fsl,imx8qxp-lpcg-conn";
+        reg = <0x5b200000 0xb0000>;
+        #clock-cells = <1>;
+    };
+
+    mmc@5b010000 {
+        compatible = "fsl,imx8qxp-usdhc", "fsl,imx7d-usdhc";
+        interrupts = <GIC_SPI 232 IRQ_TYPE_LEVEL_HIGH>;
+        reg = <0x5b010000 0x10000>;
+        clocks = <&conn_lpcg IMX_CONN_LPCG_SDHC0_IPG_CLK>,
+                 <&conn_lpcg IMX_CONN_LPCG_SDHC0_PER_CLK>,
+                 <&conn_lpcg IMX_CONN_LPCG_SDHC0_HCLK>;
+        clock-names = "ipg", "per", "ahb";
+        power-domains = <&pd IMX_SC_R_SDHC_0>;
+    };