dt-bindings: ata: Convert Allwinner AHCI controller to a schema

The Allwinner SoCs have a AHCI controllers that is supported in Linux, with
a matching Device Tree binding.

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

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
[robh: 'maxItems: 1' for resets]
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/ata/allwinner,sun4i-a10-ahci.yaml b/Documentation/devicetree/bindings/ata/allwinner,sun4i-a10-ahci.yaml
new file mode 100644
index 000000000000..cb530b46beff
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/allwinner,sun4i-a10-ahci.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/allwinner,sun4i-a10-ahci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A10 AHCI SATA Controller bindings
+
+maintainers:
+  - Chen-Yu Tsai <wens@csie.org>
+  - Maxime Ripard <mripard@kernel.org>
+
+properties:
+  compatible:
+    const: allwinner,sun4i-a10-ahci
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: AHCI Bus Clock
+      - description: AHCI Module Clock
+
+  interrupts:
+    maxItems: 1
+
+  target-supply:
+    description: Regulator for SATA target power
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    ahci: sata@1c18000 {
+        compatible = "allwinner,sun4i-a10-ahci";
+        reg = <0x01c18000 0x1000>;
+        interrupts = <56>;
+        clocks = <&pll6 0>, <&ahb_gates 25>;
+        target-supply = <&reg_ahci_5v>;
+    };