[PATCH 2/4] dt-bindings: input: touchscreen: fsl,imx6ul-tsc: add fsl,glitch-threshold

[Dario Binacchi <dario.binacchi@amarulasolutions.com>]

Add support for glitch threshold configuration. A detected signal is valid
only if it lasts longer than the set threshold; otherwise, it is regarded
as a glitch.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

 .../input/touchscreen/fsl,imx6ul-tsc.yaml      | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml b/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml
index 678756ad0f92..2fee2940213f 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml
@@ -62,6 +62,23 @@ properties:
     description: Number of data samples which are averaged for each read.
     enum: [ 1, 4, 8, 16, 32 ]
 
+  fsl,glitch-threshold:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
+    enum: [ 0, 1, 2, 3 ]
+    description: |
+      Indicates the glitch threshold. The threshold is defined by number
+      of clock cycles. A detect signal is only valid if it is exist longer
+      than threshold; otherwise, it is regarded as a glitch.
+      0: Normal function: 8191 clock cycles
+         Low power mode: 9 clock cycles
+      1: Normal function: 4095 clock cycles
+         Low power mode: 7 clock cycles
+      2: Normal function: 2047 clock cycles
+         Low power mode: 5 clock cycles
+      3: Normal function: 1023 clock cycles
+         Low power mode: 3 clock cycles
+
 required:
   - compatible
   - reg
@@ -94,4 +111,5 @@ examples:
         measure-delay-time = <0xfff>;
         pre-charge-time = <0xffff>;
         touchscreen-average-samples = <32>;
+        fsl,glitch-threshold = <2>;
     };
-- 
2.43.0