[RFC 5/9] dt-bindings: arm: samsung: Convert Exynos PMU bindings to json-schema

[Krzysztof Kozlowski <krzk@kernel.org>]

Convert Samsung Exynos Power Management Unit (PMU) bindings to DT schema
format using json-schema.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 .../devicetree/bindings/arm/samsung/pmu.txt   | 72 --------------
 .../devicetree/bindings/arm/samsung/pmu.yaml  | 93 +++++++++++++++++++
 2 files changed, 93 insertions(+), 72 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/arm/samsung/pmu.txt
 create mode 100644 Documentation/devicetree/bindings/arm/samsung/pmu.yaml

diff --git a/Documentation/devicetree/bindings/arm/samsung/pmu.txt b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
deleted file mode 100644
index 433bfd7593ac..000000000000
--- a/Documentation/devicetree/bindings/arm/samsung/pmu.txt
+++ /dev/null
@@ -1,72 +0,0 @@
-SAMSUNG Exynos SoC series PMU Registers
-
-Properties:
- - compatible : should contain two values. First value must be one from following list:
-		   - "samsung,exynos3250-pmu" - for Exynos3250 SoC,
-		   - "samsung,exynos4210-pmu" - for Exynos4210 SoC,
-		   - "samsung,exynos4412-pmu" - for Exynos4412 SoC,
-		   - "samsung,exynos5250-pmu" - for Exynos5250 SoC,
-		   - "samsung,exynos5260-pmu" - for Exynos5260 SoC.
-		   - "samsung,exynos5410-pmu" - for Exynos5410 SoC,
-		   - "samsung,exynos5420-pmu" - for Exynos5420 SoC.
-		   - "samsung,exynos5433-pmu" - for Exynos5433 SoC.
-		   - "samsung,exynos7-pmu" - for Exynos7 SoC.
-		second value must be always "syscon".
-
- - reg : offset and length of the register set.
-
- - #clock-cells : must be <1>, since PMU requires once cell as clock specifier.
-		The single specifier cell is used as index to list of clocks
-		provided by PMU, which is currently:
-			0 : SoC clock output (CLKOUT pin)
-
- - clock-names : list of clock names for particular CLKOUT mux inputs in
-		following format:
-			"clkoutN", where N is a decimal number corresponding to
-			CLKOUT mux control bits value for given input, e.g.
-				"clkout0", "clkout7", "clkout15".
-
- - clocks : list of phandles and specifiers to all input clocks listed in
-		clock-names property.
-
-Optional properties:
-
-Some PMUs are capable of behaving as an interrupt controller (mostly
-to wake up a suspended PMU). In which case, they can have the
-following properties:
-
-- interrupt-controller: indicate that said PMU is an interrupt controller
-
-- #interrupt-cells: must be identical to the that of the parent interrupt
-  controller.
-
-
-Optional nodes:
-
-- nodes defining the restart and poweroff syscon children
-
-
-Example :
-pmu_system_controller: system-controller@10040000 {
-	compatible = "samsung,exynos5250-pmu", "syscon";
-	reg = <0x10040000 0x5000>;
-	interrupt-controller;
-	#interrupt-cells = <3>;
-	interrupt-parent = <&gic>;
-	#clock-cells = <1>;
-	clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
-			"clkout4", "clkout8", "clkout9";
-	clocks = <&clock CLK_OUT_DMC>, <&clock CLK_OUT_TOP>,
-		<&clock CLK_OUT_LEFTBUS>, <&clock CLK_OUT_RIGHTBUS>,
-		<&clock CLK_OUT_CPU>, <&clock CLK_XXTI>,
-		<&clock CLK_XUSBXTI>;
-};
-
-Example of clock consumer :
-
-usb3503: usb3503@8 {
-	/* ... */
-	clock-names = "refclk";
-	clocks = <&pmu_system_controller 0>;
-	/* ... */
-};
diff --git a/Documentation/devicetree/bindings/arm/samsung/pmu.yaml b/Documentation/devicetree/bindings/arm/samsung/pmu.yaml
new file mode 100644
index 000000000000..818c6f3488ef
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/samsung/pmu.yaml
@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/samsung/pmu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC series Power Management Unit (PMU)
+
+maintainers:
+  - Krzysztof Kozlowski <krzk@kernel.org>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - samsung,exynos3250-pmu
+          - samsung,exynos4210-pmu
+          - samsung,exynos4412-pmu
+          - samsung,exynos5250-pmu
+          - samsung,exynos5260-pmu
+          - samsung,exynos5410-pmu
+          - samsung,exynos5420-pmu
+          - samsung,exynos5433-pmu
+          - samsung,exynos7-pmu
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+  clock-names:
+    description:
+      list of clock names for particular CLKOUT mux inputs
+    # TODO: what is the maximum number of elements (mux inputs)?
+    minItems: 1
+    maxItems: 32
+    items:
+      - enum:
+          - clkout0
+          - clkout1
+          - clkout2
+          - clkout3
+          - clkout4
+          - clkout5
+          - clkout6
+          - clkout7
+          - clkout8
+          - clkout9
+          - clkout10
+          - clkout11
+          - clkout12
+          - clkout13
+          - clkout14
+          - clkout15
+          - clkout16
+
+  clocks:
+    minItems: 1
+    maxItems: 32
+
+  interrupt-controller:
+    description:
+      Some PMUs are capable of behaving as an interrupt controller (mostly
+      to wake up a suspended PMU).
+
+  '#interrupt-cells':
+    # TODO: must be identical to the that of the parent interrupt controller.
+    const: 3
+
+  # TODO: Mark interrupt-controller and #interrupt-cells as required, if one is present
+  # TODO: nodes defining the restart and poweroff syscon children
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+  - clock-names
+  - clocks
+
+examples:
+  - |
+    pmu_system_controller: system-controller@10040000 {
+      compatible = "samsung,exynos5250-pmu", "syscon";
+      reg = <0x10040000 0x5000>;
+      interrupt-controller;
+      #interrupt-cells = <3>;
+       interrupt-parent = <&gic>;
+      #clock-cells = <1>;
+      clock-names = "clkout16";
+      clocks = <&clock 0>; // CLK_FIN_PLL
+    };
-- 
2.17.1