From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Hans de Goede Subject: [PATCH v2 1/2] Input: touchscreen DT binding - add touchscreen-min-x and -min-y properties Date: Thu, 7 Jun 2018 12:07:13 +0200 Message-Id: <20180607100714.9119-1-hdegoede@redhat.com> To: Dmitry Torokhov Cc: Hans de Goede , linux-input@vger.kernel.org, robh@kernel.org, devicetree@vger.kernel.org List-ID: Some touchscreens, depending on the firmware and/or the digitizer report coordinates which never reach 0 along one or both of their axis. This has been seen for example on the Silead touchscreens on a Onda V891w and a Point of View mobii TAB-P800w(v2.0). This commits documents 2 new touchscreen properties for communicating the minimum reported values to the OS: touchscreen-min-x and -min-y. This commit also drop the (in pixels) comment from the documentation of the touchscreen-size-x and touchscreen-size-y properties. This comment suggests that there is a relation between the range of reported coordinates and the display resolution, which is only true for some devices. The (in pixels) comment is replaced with "(maximum x coordinate reported + 1)" to mirror the language describing the new touchscreen-min-x and -min-y properties. Cc: robh@kernel.org Cc: devicetree@vger.kernel.org Signed-off-by: Hans de Goede --- Changes in v2: -Split out from the patch implementing support for the properties -Describe the changes to the touchscreen-size-x / -size-y description in the commit message --- .../devicetree/bindings/input/touchscreen/touchscreen.txt | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt index 537643e86f61..8aff9551259f 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt +++ b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt @@ -1,10 +1,12 @@ General Touchscreen Properties: Optional properties for Touchscreens: + - touchscreen-min-x : minimum x coordinate reported (0 if not set) + - touchscreen-min-y : minimum y coordinate reported (0 if not set) - touchscreen-size-x : horizontal resolution of touchscreen - (in pixels) + (maximum x coordinate reported + 1) - touchscreen-size-y : vertical resolution of touchscreen - (in pixels) + (maximum y coordinate reported + 1) - touchscreen-max-pressure : maximum reported pressure (arbitrary range dependent on the controller) - touchscreen-fuzz-x : horizontal noise value of the absolute input -- 2.17.1