dt-bindings: sata: Convert Calxeda SATA controller to json-schema

Convert the Calxeda Highbank SATA controller binding to DT schema format
using json-schema.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/ata/sata_highbank.txt

-* Calxeda AHCI SATA Controller
-
-SATA nodes are defined to describe on-chip Serial ATA controllers.
-The Calxeda SATA controller mostly conforms to the AHCI interface
-with some special extensions to add functionality.
-Each SATA controller should have its own node.
-
-Required properties:
-- compatible        : compatible list, contains "calxeda,hb-ahci"
-- interrupts        : <interrupt mapping for SATA IRQ>
-- reg               : <registers mapping>
-
-Optional properties:
-- dma-coherent      : Present if dma operations are coherent
-- calxeda,port-phys : phandle-combophy and lane assignment, which maps each
-			SATA port to a combophy and a lane within that
-			combophy
-- calxeda,sgpio-gpio: phandle-gpio bank, bit offset, and default on or off,
-			which indicates that the driver supports SGPIO
-			indicator lights using the indicated GPIOs
-- calxeda,led-order : a u32 array that map port numbers to offsets within the
-			SGPIO bitstream.
-- calxeda,tx-atten  : a u32 array that contains TX attenuation override
-			codes, one per port. The upper 3 bytes are always
-			0 and thus ignored.
-- calxeda,pre-clocks : a u32 that indicates the number of additional clock
-			cycles to transmit before sending an SGPIO pattern
-- calxeda,post-clocks: a u32 that indicates the number of additional clock
-			cycles to transmit after sending an SGPIO pattern
-
-Example:
-        sata@ffe08000 {
-		compatible = "calxeda,hb-ahci";
-		reg = <0xffe08000 0x1000>;
-		interrupts = <115>;
-		dma-coherent;
-		calxeda,port-phys = <&combophy5 0 &combophy0 0 &combophy0 1
-					&combophy0 2 &combophy0 3>;
-		calxeda,sgpio-gpio =<&gpioh 5 1 &gpioh 6 1 &gpioh 7 1>;
-		calxeda,led-order = <4 0 1 2 3>;
-		calxeda,tx-atten = <0xff 22 0xff 0xff 23>;
-		calxeda,pre-clocks = <10>;
-		calxeda,post-clocks = <0>;
-        };

Documentation/devicetree/bindings/ata/sata_highbank.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/sata_highbank.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Calxeda AHCI SATA Controller
+
+description: |
+  The Calxeda SATA controller mostly conforms to the AHCI interface
+  with some special extensions to add functionality, to map GPIOs for
+  activity LEDs and for mapping the ComboPHYs.
+
+maintainers:
+  - Andre Przywara <andre.przywara@arm.com>
+
+properties:
+  compatible:
+    const: calxeda,hb-ahci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  dma-coherent: true
+
+  calxeda,pre-clocks:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Indicates the number of additional clock cycles to transmit before
+      sending an SGPIO pattern.
+
+  calxeda,post-clocks:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Indicates the number of additional clock cycles to transmit after
+      sending an SGPIO pattern.
+
+  calxeda,led-order:
+    description: Maps port numbers to offsets within the SGPIO bitstream.
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+      - minItems: 1
+        maxItems: 8
+
+  calxeda,port-phys:
+    description: |
+      phandle-combophy and lane assignment, which maps each SATA port to a
+      combophy and a lane within that combophy
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/phandle-array
+      - minItems: 1
+        maxItems: 8
+
+  calxeda,tx-atten:
+    description: |
+      Contains TX attenuation override codes, one per port.
+      The upper 24 bits of each entry are always 0 and thus ignored.
+    allOf:
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+      - minItems: 1
+        maxItems: 8
+
+  calxeda,sgpio-gpio:
+    description: |
+      phandle-gpio bank, bit offset, and default on or off, which indicates
+      that the driver supports SGPIO indicator lights using the indicated
+      GPIOs.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    sata@ffe08000 {
+        compatible = "calxeda,hb-ahci";
+        reg = <0xffe08000 0x1000>;
+        interrupts = <115>;
+        dma-coherent;
+        calxeda,port-phys = <&combophy5 0>, <&combophy0 0>, <&combophy0 1>,
+                             <&combophy0 2>, <&combophy0 3>;
+        calxeda,sgpio-gpio =<&gpioh 5 1>, <&gpioh 6 1>, <&gpioh 7 1>;
+        calxeda,led-order = <4 0 1 2 3>;
+        calxeda,tx-atten = <0xff 22 0xff 0xff 23>;
+        calxeda,pre-clocks = <10>;
+        calxeda,post-clocks = <0>;
+    };
+
+...