Add an option to periodicaly poll the device to get state of the inputs
as the interrupt line may not be used on some platforms.
Signed-off-by: Michal Vokáč <michal.vokac@xxxxxxxxx>
---
Changes since v1:
- Use poll-interval instead of linux,poll-interval.
- Place the poll-interval binding into the common schema.
- Properly describe that either interrupts or poll-interval property is
required.
- Fix the example to pass validation.
.../bindings/input/fsl,mpr121-touchkey.yaml | 25 +++++++++++++++++++++-
Documentation/devicetree/bindings/input/input.yaml | 4 ++++
2 files changed, 28 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/input/fsl,mpr121-touchkey.yaml b/Documentation/devicetree/bindings/input/fsl,mpr121-touchkey.yaml
index c6fbcdf78556..035b2fee4491 100644
--- a/Documentation/devicetree/bindings/input/fsl,mpr121-touchkey.yaml
+++ b/Documentation/devicetree/bindings/input/fsl,mpr121-touchkey.yaml
@@ -17,6 +17,10 @@ description: |
allOf:
- $ref: input.yaml#
+oneOf:
+ - required: [ interrupts ]
+ - required: [ poll-interval ]
+
properties:
compatible:
const: fsl,mpr121-touchkey
@@ -41,12 +45,12 @@ properties:
required:
- compatible
- reg
- - interrupts
- vdd-supply
- linux,keycodes
examples:
- |
+ // Example with interrupts
#include "dt-bindings/input/input.h"
i2c {
#address-cells = <1>;
@@ -64,3 +68,22 @@ examples:
<KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;
};
};
+
+ - |
+ // Example with polling
+ #include "dt-bindings/input/input.h"
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ mpr121@5a {
+ compatible = "fsl,mpr121-touchkey";
+ reg = <0x5a>;
+ poll-interval = <20>;
+ autorepeat;
+ vdd-supply = <&ldo4_reg>;
+ linux,keycodes = <KEY_0>, <KEY_1>, <KEY_2>, <KEY_3>,
+ <KEY_4>, <KEY_5>, <KEY_6>, <KEY_7>,
+ <KEY_8>, <KEY_9>, <KEY_A>, <KEY_B>;
+ };
+ };
diff --git a/Documentation/devicetree/bindings/input/input.yaml b/Documentation/devicetree/bindings/input/input.yaml
index 494e7d031ea3..cc5f9e8a3c01 100644
--- a/Documentation/devicetree/bindings/input/input.yaml
+++ b/Documentation/devicetree/bindings/input/input.yaml
@@ -23,3 +23,7 @@ properties:
autorepeat:
description: Enable autorepeat when key is pressed and held down.
type: boolean
+
+ poll-interval:
+ description: Poll interval time in milliseconds.
+ $ref: /schemas/types.yaml#/definitions/uint32
--
2.1.4
