[PATCH 1/2] Documentation: sample averaging for imx6ul_tsc
flat view
STALE3604d
From: Guy Shapiro <hidden>
Date: 2016-11-27 07:44:57
Also in:
linux-arm-kernel, linux-devicetree
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Dmitry Torokhov, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The i.MX6UL internal touchscreen controller contains an option to average upon samples. This feature reduces noise from the produced touch locations. This patch introduces a new device tree optional property for this feature. It provides control over the amount of averaged samples per touch event. The property was inspired by a similar property on the "brcm,iproc-touchscreen" binding. Signed-off-by: Guy Shapiro <redacted> --- .../devicetree/bindings/input/touchscreen/imx6ul_tsc.txt | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt b/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt
index 853dff9..a66069f 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt@@ -17,6 +17,13 @@ Optional properties: This value depends on the touch screen. - pre-charge-time: the touch screen need some time to precharge. This value depends on the touch screen. +- average-samples: Number of data samples which are averaged for each read. + Valid values 0-4 + 0 = 1 sample + 1 = 4 samples + 2 = 8 samples + 3 = 16 samples + 4 = 32 samples Example: tsc: tsc@02040000 {
@@ -32,5 +39,6 @@ Example: xnur-gpio = <&gpio1 3 GPIO_ACTIVE_LOW>; measure-delay-time = <0xfff>; pre-charge-time = <0xffff>; + average-samples = <4>; status = "okay"; };
--
2.1.4