[PATCH v2 28/52] dt-bindings: mfd: Convert X-Powers AC100 binding to a schema

[Maxime Ripard]

The X-Powers AC100 hybrid devices are supported by Linux thanks to its
device tree binding.

Now that we have the DT validation in place, let's convert the device
tree bindings for that driver over to a YAML schema.

Cc: Lee Jones <lee.jones at linaro.org>
Acked-by: Chen-Yu Tsai <wens at csie.org>
Signed-off-by: Maxime Ripard <maxime at cerno.tech>

---

Changes from v1:
  - Added maximum number of clocks properties
---
 .../devicetree/bindings/mfd/ac100.txt         |  50 --------
 .../bindings/mfd/x-powers,ac100.yaml          | 116 ++++++++++++++++++
 2 files changed, 116 insertions(+), 50 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/mfd/ac100.txt
 create mode 100644 Documentation/devicetree/bindings/mfd/x-powers,ac100.yaml

diff --git a/Documentation/devicetree/bindings/mfd/ac100.txt b/Documentation/devicetree/bindings/mfd/ac100.txt
deleted file mode 100644
index dff219f07493..000000000000
--- a/Documentation/devicetree/bindings/mfd/ac100.txt
+++ /dev/null
@@ -1,50 +0,0 @@
-X-Powers AC100 Codec/RTC IC Device Tree bindings
-
-AC100 is a audio codec and RTC subsystem combo IC. The 2 parts are
-separated, including power supplies and interrupt lines, but share
-a common register address space and host interface.
-
-Required properties:
-- compatible: "x-powers,ac100"
-- reg: The I2C slave address or RSB hardware address for the chip
-- sub-nodes:
-  - codec
-    - compatible:		"x-powers,ac100-codec"
-    - interrupts:		SoC NMI / GPIO interrupt connected to the
-    				IRQ_AUDIO pin
-    - #clock-cells:		Shall be 0
-    - clock-output-names:	"4M_adda"
-
-    - see clock/clock-bindings.txt for common clock bindings
-
-  - rtc
-    - compatible:		"x-powers,ac100-rtc"
-    - clocks:			A phandle to the codec's "4M_adda" clock
-    - #clock-cells:		Shall be 1
-    - clock-output-names:	"cko1_rtc", "cko2_rtc", "cko3_rtc"
-
-    - see clock/clock-bindings.txt for common clock bindings
-
-Example:
-
-ac100: codec at e89 {
-	compatible = "x-powers,ac100";
-	reg = <0xe89>;
-
-	ac100_codec: codec {
-		compatible = "x-powers,ac100-codec";
-		interrupt-parent = <&r_pio>;
-		interrupts = <0 9 IRQ_TYPE_LEVEL_LOW>; /* PL9 */
-		#clock-cells = <0>;
-		clock-output-names = "4M_adda";
-	};
-
-	ac100_rtc: rtc {
-		compatible = "x-powers,ac100-rtc";
-		interrupt-parent = <&nmi_intc>;
-		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
-		clocks = <&ac100_codec>;
-		#clock-cells = <1>;
-		clock-output-names = "cko1_rtc", "cko2_rtc", "cko3_rtc";
-	};
-};
diff --git a/Documentation/devicetree/bindings/mfd/x-powers,ac100.yaml b/Documentation/devicetree/bindings/mfd/x-powers,ac100.yaml
new file mode 100644
index 000000000000..de330c9869ff
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/x-powers,ac100.yaml
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/mfd/x-powers,ac100.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: X-Powers AC100 Device Tree Bindings
+
+maintainers:
+  - Chen-Yu Tsai <wens at csie.org>
+
+properties:
+  compatible:
+    const: x-powers,ac100
+
+  reg:
+    maxItems: 1
+
+  codec:
+    type: object
+
+    properties:
+      "#clock-cells":
+        const: 0
+
+      compatible:
+        const: x-powers,ac100-codec
+
+      interrupts:
+        maxItems: 1
+
+      clock-output-names:
+        maxItems: 1
+        description: >
+          Name of the 4M_adda clock exposed by the codec
+
+    required:
+      - "#clock-cells"
+      - compatible
+      - interrupts
+      - clock-output-names
+
+    additionalProperties: false
+
+  rtc:
+    type: object
+
+    properties:
+      "#clock-cells":
+        const: 1
+
+      compatible:
+        const: x-powers,ac100-rtc
+
+      interrupts:
+        maxItems: 1
+
+      clocks:
+        maxItems: 1
+        description: >
+           A phandle to the codec's "4M_adda" clock
+
+      clock-output-names:
+        maxItems: 3
+        description: >
+          Name of the cko1, cko2 and cko3 clocks exposed by the codec
+
+    required:
+      - "#clock-cells"
+      - compatible
+      - interrupts
+      - clocks
+      - clock-output-names
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - codec
+  - rtc
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    rsb {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        codec at e89 {
+            compatible = "x-powers,ac100";
+            reg = <0xe89>;
+
+            ac100_codec: codec {
+                compatible = "x-powers,ac100-codec";
+                interrupt-parent = <&r_pio>;
+                interrupts = <0 9 IRQ_TYPE_LEVEL_LOW>; /* PL9 */
+                #clock-cells = <0>;
+                clock-output-names = "4M_adda";
+            };
+
+            ac100_rtc: rtc {
+                compatible = "x-powers,ac100-rtc";
+                interrupt-parent = <&nmi_intc>;
+                interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+                clocks = <&ac100_codec>;
+                #clock-cells = <1>;
+                clock-output-names = "cko1_rtc", "cko2_rtc", "cko3_rtc";
+            };
+        };
+    };
+
+...
-- 
2.31.1