From cf6f234d7dfbbb13197eb71e7716412d4e30988d Mon Sep 17 00:00:00 2001 From: Dario Binacchi Date: Tue, 23 Sep 2025 16:37:34 +0200 Subject: [PATCH] dt-bindings: touchscreen: add debounce-delay-us property MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add support for glitch delay configuration. A detected signal is valid only if it remains stable longer than the configured delay; otherwise, it is considered a glitch. This property was introduced for the i.MX6UL touchscreen controller (TSC), which provides a hardware deglitch filter with four thresholds depending on the IPG clock frequency. In this use case, the IPG clock rate is 66 MHz, resulting in thresholds of 124 µs, 62 µs, 31 µs, and 15 µs, which requires a property with microsecond-level resolution. Signed-off-by: Dario Binacchi Acked-by: Conor Dooley Link: https://lore.kernel.org/r/20250923143746.2857292-4-dario.binacchi@amarulasolutions.com Signed-off-by: Dmitry Torokhov --- .../devicetree/bindings/input/touchscreen/touchscreen.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml index 3e3572aa483a..7023e8c73a7b 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml +++ b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.yaml @@ -206,6 +206,10 @@ properties: unevaluatedProperties: false + debounce-delay-us: + description: Minimum duration in microseconds a signal must remain stable + to be considered valid. + dependencies: touchscreen-size-x: [ touchscreen-size-y ] touchscreen-size-y: [ touchscreen-size-x ] -- 2.51.0