Re: [PATCH v2 4/6] dt-bindings: touchscreen: fsl,imx6ul-tsc: support glitch thresold
flat view
From: Frank Li <Frank.li@nxp.com>
Date: 2025-09-15 14:30:39
Also in:
imx, linux-arm-kernel, linux-devicetree, lkml
On Sun, Sep 14, 2025 at 07:16:01PM +0200, Dario Binacchi wrote:
quoted hunk ↗ jump to hunk
Support the touchscreen-glitch-threshold-ns property. Unlike the generic description in touchscreen.yaml, this controller maps the provided value to one of four discrete thresholds internally. Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com> --- (no changes since v1) .../input/touchscreen/fsl,imx6ul-tsc.yaml | 15 +++++++++++++++ 1 file changed, 15 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..310af56a0be6 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/fsl,imx6ul-tsc.yaml@@ -62,6 +62,21 @@ properties: description: Number of data samples which are averaged for each read. enum: [ 1, 4, 8, 16, 32 ] + touchscreen-glitch-threshold-ns: + description: | + Unlike the generic property defined in touchscreen.yaml, this + controller does not allow arbitrary values. Internally the value is + converted to IPG clock cycles and mapped to one of four discrete + thresholds exposed by the TSC_DEBUG_MODE2 register: + + 0: 8191 IPG cycles + 1: 4095 IPG cycles + 2: 2047 IPG cycles + 3: 1023 IPG cycles
you should use ns
enum:
- 1023
- 2047
- 4095
- 8191
you can limit only 4 values, but unit have to ns. your driver map it to
register value.
Frank
+ + Any value provided in device tree is converted to cycles and rounded + up to the next supported threshold, or to 8191 if above 4095. + required: - compatible - reg -- 2.43.0