dt-bindings: clock: qcom,hfpll: Convert to YAML

Convert the .txt documentation to .yaml with some adjustments.

* APQ8064/IPQ8064/MSM8960 compatibles are dropped since their HFPLLs are
a part of GCC so there is no need for a separate compat entry.
* Change the MSM8974 compatible to follow the updated naming schema.
Theis compatible is not used upstream yet.
* Add qcs404-hfpll. QCS404 currently uses qcom,hfpll. Mark that as
deprecated since every SoC appears to need different driver data so
"qcom,hfpll" makes no sense to keep

Signed-off-by: Luca Weiss <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

Documentation/devicetree/bindings/clock/qcom,hfpll.txt

···
-High-Frequency PLL (HFPLL)
-
-PROPERTIES
-
-- compatible:
-	Usage: required
-	Value type: <string>:
-		shall contain only one of the following. The generic
-		compatible "qcom,hfpll" should be also included.
-
-                        "qcom,hfpll-ipq8064", "qcom,hfpll"
-                        "qcom,hfpll-apq8064", "qcom,hfpll"
-                        "qcom,hfpll-msm8974", "qcom,hfpll"
-                        "qcom,hfpll-msm8960", "qcom,hfpll"
-                        "qcom,msm8976-hfpll-a53", "qcom,hfpll"
-                        "qcom,msm8976-hfpll-a72", "qcom,hfpll"
-                        "qcom,msm8976-hfpll-cci", "qcom,hfpll"
-
-- reg:
-	Usage: required
-	Value type: <prop-encoded-array>
-	Definition: address and size of HPLL registers. An optional second
-		    element specifies the address and size of the alias
-		    register region.
-
-- clocks:
-	Usage: required
-	Value type: <prop-encoded-array>
-	Definition: reference to the xo clock.
-
-- clock-names:
-	Usage: required
-	Value type: <stringlist>
-	Definition: must be "xo".
-
-- clock-output-names:
-	Usage: required
-	Value type: <string>
-	Definition: Name of the PLL. Typically hfpllX where X is a CPU number
-		    starting at 0. Otherwise hfpll_Y where Y is more specific
-		    such as "l2".
-
-Example:
-
-1) An HFPLL for the L2 cache.
-
-	clock-controller@f9016000 {
-		compatible = "qcom,hfpll-ipq8064", "qcom,hfpll";
-		reg = <0xf9016000 0x30>;
-		clocks = <&xo_board>;
-		clock-names = "xo";
-		clock-output-names = "hfpll_l2";
-	};
-
-2) An HFPLL for CPU0. This HFPLL has the alias register region.
-
-	clock-controller@f908a000 {
-		compatible = "qcom,hfpll-ipq8064", "qcom,hfpll";
-		reg = <0xf908a000 0x30>, <0xf900a000 0x30>;
-		clocks = <&xo_board>;
-		clock-names = "xo";
-		clock-output-names = "hfpll0";
-	};

Documentation/devicetree/bindings/clock/qcom,hfpll.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,hfpll.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm High-Frequency PLL
+
+maintainers:
+  - Bjorn Andersson <[e-mail]>
+
+description:
+  The HFPLL is used as CPU PLL on various Qualcomm SoCs.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - qcom,msm8974-hfpll
+          - qcom,msm8976-hfpll-a53
+          - qcom,msm8976-hfpll-a72
+          - qcom,msm8976-hfpll-cci
+          - qcom,qcs404-hfpll
+      - const: qcom,hfpll
+        deprecated: true
+
+  reg:
+    items:
+      - description: HFPLL registers
+      - description: Alias register region
+    minItems: 1
+
+  '#clock-cells':
+    const: 0
+
+  clocks:
+    items:
+      - description: board XO clock
+
+  clock-names:
+    items:
+      - const: xo
+
+  clock-output-names:
+    description:
+      Name of the PLL. Typically hfpllX where X is a CPU number starting at 0.
+      Otherwise hfpll_Y where Y is more specific such as "l2".
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+  - clocks
+  - clock-names
+  - clock-output-names
+
+additionalProperties: false
+
+examples:
+  - |
+    clock-controller@f908a000 {
+        compatible = "qcom,msm8974-hfpll";
+        reg = <0xf908a000 0x30>, <0xf900a000 0x30>;
+        #clock-cells = <0>;
+        clock-output-names = "hfpll0";
+        clocks = <&xo_board>;
+        clock-names = "xo";
+    };