dt-bindings: Convert ahci-platform DT bindings to yaml

diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
deleted file mode 100644
index 77091a277642..000000000000
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ /dev/null
@@ -1,79 +0,0 @@ 
-* AHCI SATA Controller
-
-SATA nodes are defined to describe on-chip Serial ATA controllers.
-Each SATA controller should have its own node.
-
-It is possible, but not required, to represent each port as a sub-node.
-It allows to enable each port independently when dealing with multiple
-PHYs.
-
-Required properties:
-- compatible        : compatible string, one of:
-  - "brcm,iproc-ahci"
-  - "hisilicon,hisi-ahci"
-  - "cavium,octeon-7130-ahci"
-  - "ibm,476gtr-ahci"
-  - "marvell,armada-380-ahci"
-  - "marvell,armada-3700-ahci"
-  - "snps,dwc-ahci"
-  - "snps,spear-ahci"
-  - "generic-ahci"
-- interrupts        : <interrupt mapping for SATA IRQ>
-- reg               : <registers mapping>
-
-Please note that when using "generic-ahci" you must also specify a SoC specific
-compatible:
-	compatible = "manufacturer,soc-model-ahci", "generic-ahci";
-
-Optional properties:
-- dma-coherent      : Present if dma operations are coherent
-- clocks            : a list of phandle + clock specifier pairs
-- resets            : a list of phandle + reset specifier pairs
-- target-supply     : regulator for SATA target power
-- phy-supply        : regulator for PHY power
-- phys              : reference to the SATA PHY node
-- phy-names         : must be "sata-phy"
-- ahci-supply       : regulator for AHCI controller
-- ports-implemented : Mask that indicates which ports that the HBA supports
-		      are available for software to use. Useful if PORTS_IMPL
-		      is not programmed by the BIOS, which is true with
-		      some embedded SOC's.
-
-Required properties when using sub-nodes:
-- #address-cells    : number of cells to encode an address
-- #size-cells       : number of cells representing the size of an address
-
-Sub-nodes required properties:
-- reg		    : the port number
-And at least one of the following properties:
-- phys		    : reference to the SATA PHY node
-- target-supply     : regulator for SATA target power
-
-Examples:
-        sata@ffe08000 {
-		compatible = "snps,spear-ahci";
-		reg = <0xffe08000 0x1000>;
-		interrupts = <115>;
-        };
-
-With sub-nodes:
-	sata@f7e90000 {
-		compatible = "marvell,berlin2q-achi", "generic-ahci";
-		reg = <0xe90000 0x1000>;
-		interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&chip CLKID_SATA>;
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		sata0: sata-port@0 {
-			reg = <0>;
-			phys = <&sata_phy 0>;
-			target-supply = <&reg_sata0>;
-		};
-
-		sata1: sata-port@1 {
-			reg = <1>;
-			phys = <&sata_phy 1>;
-			target-supply = <&reg_sata1>;;
-		};
-	};
diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.yaml b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
new file mode 100644
index 000000000000..b5bef93215c0
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
@@ -0,0 +1,134 @@ 
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/ahci-platform.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AHCI SATA Controller
+description:
+  SATA nodes are defined to describe on-chip Serial ATA controllers.
+  Each SATA controller should have its own node.
+
+  It is possible, but not required, to represent each port as a sub-node.
+  It allows to enable each port independently when dealing with multiple
+  PHYs.
+
+maintainers:
+  - Hans de Goede <hdegoede@redhat.com>
+  - Jens Axboe <axboe@kernel.dk>
+
+properties:
+  compatible:
+    enum:
+      - brcm,iproc-ahci
+      - hisilicon,hisi-ahci
+      - cavium,octeon-7130-ahci
+      - ibm,476gtr-ahci
+      - marvell,armada-380-ahci
+      - marvell,armada-3700-ahci
+      - snps,dwc-ahci
+      - snps,spear-ahci
+      - generic-ahci
+
+  ahci-supply:
+    description:
+      regulator for AHCI controller
+
+  dma-coherent:
+    description:
+      Present if dma operations are coherent
+
+  clocks:
+    minItems: 1
+    maxItems: 3
+
+  interrupts:
+    minItems: 1
+
+  phy-supply:
+    description:
+      regulator for PHY power
+
+  phys:
+    minItems: 1
+
+  phy-names:
+    minItems: 1
+
+  ports-implemented:
+    description:
+      Mask that indicates which ports that the HBA supports
+      are available for software to use. Useful if PORTS_IMPL
+      is not programmed by the BIOS, which is true with
+      some embedded SOC's.
+    minItems: 1
+
+  reg:
+    maxItems: 1
+
+  resets:
+    minItems: 1
+
+  target-supply:
+    description:
+      regulator for SATA target power
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+patternProperties:
+  "^sata-port@[0-9]+$":
+    type: object
+    description:
+      Subnode with configuration of the Ports.
+
+    properties:
+      reg:
+        maxItems: 1
+
+      phys:
+        minItems: 1
+
+      target-supply:
+        description:
+          regulator for SATA target power
+
+    required:
+      - reg
+
+    anyOf:
+      - required: [ phys ]
+      - required: [ target-supply ]
+
+additionalProperties: true
+
+examples:
+  - |
+        sata@ffe08000 {
+               compatible = "snps,spear-ahci";
+               reg = <0xffe08000 0x1000>;
+               interrupts = <115>;
+        };
+  - |
+        sata@f7e90000 {
+                compatible = "marvell,berlin2q-achi", "generic-ahci";
+                reg = <0xe90000 0x1000>;
+                interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
+                clocks = <&chip CLKID_SATA>;
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                sata0: sata-port@0 {
+                        reg = <0>;
+                        phys = <&sata_phy 0>;
+                        target-supply = <&reg_sata0>;
+                };
+
+                sata1: sata-port@1 {
+                        reg = <1>;
+                        phys = <&sata_phy 1>;
+                        target-supply = <&reg_sata1>;;
+                };
+        };