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[82.56.38.125]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b2a2a5f6c7asm665204666b.28.2025.09.23.07.37.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Sep 2025 07:37:53 -0700 (PDT) From: Dario Binacchi To: linux-kernel@vger.kernel.org Cc: linux-amarula@amarulasolutions.com, Frank Li , Dario Binacchi , Conor Dooley , Conor Dooley , Dmitry Torokhov , Javier Carrasco , Jeff LaBundy , Krzysztof Kozlowski , Rob Herring , devicetree@vger.kernel.org, linux-input@vger.kernel.org Subject: [PATCH v6 3/6] dt-bindings: touchscreen: add debounce-delay-us property Date: Tue, 23 Sep 2025 16:37:34 +0200 Message-ID: <20250923143746.2857292-4-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250923143746.2857292-1-dario.binacchi@amarulasolutions.com> References: <20250923143746.2857292-1-dario.binacchi@amarulasolutions.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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 =C2=B5s, 62 =C2=B5s, 31 =C2=B5s, and 15 =C2= =B5s, which requires a property with microsecond-level resolution. Signed-off-by: Dario Binacchi Acked-by: Conor Dooley --- Changes in v6: - Rename touchscreen-glitch-threshold-ns to debounce-delay-us. - Update and improve the commit message Changes in v5: - Add Acked-by tag of Conor Dooley Changes in v2: - Added in v2. .../devicetree/bindings/input/touchscreen/touchscreen.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/input/touchscreen/touchscree= n.yaml b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.ya= ml 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: =20 unevaluatedProperties: false =20 + debounce-delay-us: + description: Minimum duration in microseconds a signal must remain sta= ble + to be considered valid. + dependencies: touchscreen-size-x: [ touchscreen-size-y ] touchscreen-size-y: [ touchscreen-size-x ] --=20 2.43.0