[PATCH 1/2] dt-bindings: Create DT bindings for [PS]ATA controllers

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I need to create subnodes for drives connected to PATA
or SATA host controllers, and this needs to be supported
generally, so create a common YAML binding for
"pata-controller" or "sata-controller" that will support
subnodes with drives.

Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
 .../bindings/ata/pata-sata-common.yaml        | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/ata/pata-sata-common.yaml

diff --git a/Documentation/devicetree/bindings/ata/pata-sata-common.yaml b/Documentation/devicetree/bindings/ata/pata-sata-common.yaml
new file mode 100644
index 000000000000..d94aa20a29e3
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/pata-sata-common.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/pata-sata-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common Properties for Parallel and Serial AT attachment controllers
+
+maintainers:
+  - Linus Walleij <linus.walleij@xxxxxxxxxx>
+
+description: |
+  This document defines device tree properties common to most Parallel
+  (PATA) and Serial (SATA) AT attachment storage devices. It doesn't
+  constitue a device tree binding specification by itself but is meant to
+  be referenced by device tree bindings.
+
+  The PATA/SATA controller device tree bindings are responsible for
+  defining whether each property is required or optional.
+
+properties:
+  $nodename:
+    pattern: "^[ps]ata-controller(@.*)?$"
+    description:
+      Specifies the host controller node.
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^drive@[0-1]$":
+    description: |
+      DT nodes for drives connected on the PATA or SATA host. The master drive
+      will have ID number 0 and the slave drive will have ID number 1.
+    type: object
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 1
+        description:
+          The ID number of the drive, 0 for the master and 1 for the slave.
+
+...
-- 
2.21.0




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