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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250722103706.3440777-3-dario.binacchi@amarulasolutions.com>
Date: Tue, 22 Jul 2025 12:36:16 +0200
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Fabio Estevam <festevam@...il.com>,
	Haibo Chen <haibo.chen@....com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-input@...r.kernel.org
Subject: [PATCH 2/4] dt-bindings: input: touchscreen: fsl,imx6ul-tsc: add fsl,glitch-threshold

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@...rulasolutions.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