dt-bindings: ata: Convert i.MX sata to json-schema

Convert the i.MX sata binding to DT schema format using json-schema.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1596611746-29155-1-git-send-email-Anson.Huang@nxp.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/ata/imx-sata.txt

-* Freescale i.MX AHCI SATA Controller
-
-The Freescale i.MX SATA controller mostly conforms to the AHCI interface
-with some special extensions at integration level.
-
-Required properties:
-- compatible : should be one of the following:
-   - "fsl,imx53-ahci" for i.MX53 SATA controller
-   - "fsl,imx6q-ahci" for i.MX6Q SATA controller
-   - "fsl,imx6qp-ahci" for i.MX6QP SATA controller
-- interrupts : interrupt mapping for SATA IRQ
-- reg : registers mapping
-- clocks : list of clock specifiers, must contain an entry for each
-  required entry in clock-names
-- clock-names : should include "sata", "sata_ref" and "ahb" entries
-
-Optional properties:
-- fsl,transmit-level-mV : transmit voltage level, in millivolts.
-- fsl,transmit-boost-mdB : transmit boost level, in milli-decibels
-- fsl,transmit-atten-16ths : transmit attenuation, in 16ths
-- fsl,receive-eq-mdB : receive equalisation, in milli-decibels
-  Please refer to the technical documentation or the driver source code
-  for the list of legal values for these options.
-- fsl,no-spread-spectrum : disable spread-spectrum clocking on the SATA
-  link.
-
-Examples:
-
-sata@2200000 {
-	compatible = "fsl,imx6q-ahci";
-	reg = <0x02200000 0x4000>;
-	interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
-	clocks = <&clks IMX6QDL_CLK_SATA>,
-		 <&clks IMX6QDL_CLK_SATA_REF_100M>,
-		 <&clks IMX6QDL_CLK_AHB>;
-	clock-names = "sata", "sata_ref", "ahb";
-};

Documentation/devicetree/bindings/ata/imx-sata.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/imx-sata.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX AHCI SATA Controller
+
+maintainers:
+  - Shawn Guo <shawn.guo@linaro.org>
+
+description: |
+  The Freescale i.MX SATA controller mostly conforms to the AHCI interface
+  with some special extensions at integration level.
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx53-ahci
+      - fsl,imx6q-ahci
+      - fsl,imx6qp-ahci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: sata clock
+      - description: sata reference clock
+      - description: ahb clock
+
+  clock-names:
+    items:
+      - const: sata
+      - const: sata_ref
+      - const: ahb
+
+  fsl,transmit-level-mV:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: transmit voltage level, in millivolts.
+
+  fsl,transmit-boost-mdB:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: transmit boost level, in milli-decibels.
+
+  fsl,transmit-atten-16ths:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: transmit attenuation, in 16ths.
+
+  fsl,receive-eq-mdB:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: receive equalisation, in milli-decibels.
+
+  fsl,no-spread-spectrum:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: if present, disable spread-spectrum clocking on the SATA link.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx6qdl-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    sata@2200000 {
+        compatible = "fsl,imx6q-ahci";
+        reg = <0x02200000 0x4000>;
+        interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clks IMX6QDL_CLK_SATA>,
+                 <&clks IMX6QDL_CLK_SATA_REF_100M>,
+                 <&clks IMX6QDL_CLK_AHB>;
+        clock-names = "sata", "sata_ref", "ahb";
+    };