[PATCH v8 3/8] ARM: dt: Binding documentation for imx25 touchscreen controller

Markus Pargmann
2015-11-16T12:01:04Z

This is the touchscreen conversion queue binding documentation. It uses
the shared imx25 ADC.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---

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..89ab47a3acc1
--- /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 in nanoseconds.
+ - 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@50030400 {
+ compatible = "fsl,imx25-tcq";
+ reg = <0x50030400 0x60>;
+ interrupt-parent = <&tscadc>;
+ interrupts = <0>;
+ fsl,wires = <4>;
+ };
--
2.6.1