[PATCH v6 1/2] dt-bindings: hwlock: add sun6i_hwspinlock

[Wilken Gottwalt]

Adds documentation on how to use the sun6i_hwspinlock driver for sun6i
compatible series SoCs.

Signed-off-by: Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>
---
Changes in v6:
  - fixed formating and name issues in dt documentation

Changes in v5:
  - changed binding to earliest known supported SoC sun6i-a31
  - dropped unnecessary entries

Changes in v4:
  - changed binding to sun8i-a33-hwpinlock
  - added changes suggested by Maxime Ripard

Changes in v3:
  - changed symbols from sunxi to sun8i

Changes in v2:
  - fixed memory ranges
---
 .../hwlock/allwinner,sun6i-hwspinlock.yaml    | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwlock/allwinner,sun6i-hwspinlock.yaml

diff --git a/Documentation/devicetree/bindings/hwlock/allwinner,sun6i-hwspinlock.yaml b/Documentation/devicetree/bindings/hwlock/allwinner,sun6i-hwspinlock.yaml
new file mode 100644
index 000000000000..733c3d01e56c
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwlock/allwinner,sun6i-hwspinlock.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwlock/allwinner,sun6i-hwspinlock.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SUN6I hardware spinlock driver for Allwinner sun6i compatible SoCs
+
+maintainers:
+  - Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>
+
+description:
+  The hardware unit provides semaphores between the ARM cores and the embedded
+  companion core on the SoC.
+
+properties:
+  compatible:
+    const: allwinner,sun6i-a31-hwspinlock
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    hwlock@1c18000 {
+        compatible = "allwinner,sun6i-a31-hwspinlock";
+        reg = <0x01c18000 0x1000>;
+        clocks = <&ccu CLK_BUS_SPINLOCK>;
+        resets = <&ccu RST_BUS_SPINLOCK>;
+    };
+...
-- 
2.30.1