From mboxrd@z Thu Jan 1 00:00:00 1970 From: mpa@pengutronix.de (Markus Pargmann) Date: Tue, 3 Mar 2015 08:58:13 +0100 Subject: [PATCH v7 3/8] ARM: dt: Binding documentation for imx25 touchscreen controller In-Reply-To: <1425369498-25541-1-git-send-email-mpa@pengutronix.de> References: <1425369498-25541-1-git-send-email-mpa@pengutronix.de> Message-ID: <1425369498-25541-4-git-send-email-mpa@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This is the touchscreen conversion queue binding documentation. It uses the shared imx25 ADC. Signed-off-by: Markus Pargmann --- Notes: Changes in v5: - Fix signed/unsigned comparison - Fix unused variable settling_time by putting it in the correct argument list - Use continous conversion queue with the repeat feature and a proper repeat-wait. Previously the touchscreen caused massive number of interrupts. .../bindings/input/touchscreen/fsl-mx25-tcq.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt diff --git a/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt new file mode 100644 index 000000000000..4214a99d197a --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt @@ -0,0 +1,29 @@ +Freescale mx25 TS conversion queue module + +mx25 touchscreen conversion queue module which controls the ADC unit of the +mx25 for attached touchscreens. + +Required properties: + - compatible: Should be "fsl,imx25-tcq". + - reg: Memory range of the device. + - interrupts: Should be the interrupt number associated with this module within + the tscadc unit (<0>). + - interrupt-parent: Should be a phandle to the tscadc unit. + - fsl,wires: Should be '<4>' or '<5>' + +Optional properties: + - fsl,pen-debounce: Pen debounce time. + - fsl,pen-threshold: Pen-down threshold for the touchscreen. + - fsl,settling-time: Settling time in nanoseconds. + +This device includes two conversion queues which can be added as subnodes. +The first queue is for the touchscreen, the second for general purpose ADC. + +Example: + tsc: tcq at 50030400 { + compatible = "fsl,imx25-tcq"; + reg = <0x50030400 0x60>; + interrupt-parent = <&tscadc>; + interrupts = <0>; + fsl,wires = <4>; + }; -- 2.1.4