[2/3] dt-bindings: counter: atmel-tcb-capture counter

Commit Message

Kamel BOUHARA April 6, 2020, 3:53 p.m. UTC

Describe the devicetree binding for the ATMEL TCB counter. Each counter
blocks exposes three independent counters.

However, when configured in quadrature decoder, both channel <0> and <1>
are required for speed/position and rotation capture (yet only the
position is captured).

Signed-off-by: Kamel Bouhara <[e-mail]>
---
 .../bindings/counter/atmel-tcb-capture.yaml   | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/counter/atmel-tcb-capture.yaml

Patch

diff --git a/Documentation/devicetree/bindings/counter/atmel-tcb-capture.yaml b/Documentation/devicetree/bindings/counter/atmel-tcb-capture.yaml
new file mode 100644
index 000000000000..484b2942ad5c
--- /dev/null
+++ b/Documentation/devicetree/bindings/counter/atmel-tcb-capture.yaml
@@ -0,0 +1,35 @@ 
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/counter/atmel-tcb-capture.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel TCB Counter
+
+maintainers:
+  - Kamel Bouhara <[e-mail]>
+
+properties:
+  compatible:
+    const: "atmel,tcb-capture"
+
+  reg:
+    description: TCB capture channel to register as counter device.
+      Each channel is independent therefore only one channel is
+      registered by default execpt for the QDEC mode where both TCB0's
+      channels <0> and  <1> are required.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    tcb0: timer@f800c000 {
+        qdec: timer@0 {
+            compatible = "atmel,tcb-capture";
+            reg = <0>, <1>;
+        };
+    };