Re: [PATCH v10 3/8] ARM: dt: Binding documentation for imx25 touchscreen controller

[Rob Herring]

On Mon, Dec 14, 2015 at 02:53:49PM +0100, Markus Pargmann wrote:
> This is the touchscreen conversion queue binding documentation. It uses
> the shared imx25 ADC.
> 
> Signed-off-by: Markus Pargmann 
> ---
> 
> Notes:
> Changes in v9:
>  - Updated binding descriptions
> 
> 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| 35 
> ++
>  1 file changed, 35 insertions(+)
>  create mode 100644 
> Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt

Acked-by: Rob Herring 
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[PATCH v10 3/8] ARM: dt: Binding documentation for imx25 touchscreen controller

[Markus Pargmann]

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

Signed-off-by: Markus Pargmann 
---

Notes:
Changes in v9:
 - Updated binding descriptions

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| 35 ++
 1 file changed, 35 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 ..cdf05f9b2329
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/fsl-mx25-tcq.txt
@@ -0,0 +1,35 @@
+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-ns: Pen debounce time in nanoseconds.
+ - fsl,pen-threshold: Pen-down threshold for the touchscreen. This is a value
+   between 1 and 4096. It is the ratio between the internal reference voltage
+   and the measured voltage after the plate was precharged. Resistence between
+   plates and therefore the voltage decreases with pressure so that a smaller
+   value is equivalent to a higher pressure.
+ - fsl,settling-time-ns: Settling time in nanoseconds. The settling time is 
before
+   the actual touch detection to wait for an even charge distribution in the
+   plate.
+
+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 = <>;
+   interrupts = <0>;
+   fsl,wires = <4>;
+   };
-- 
2.6.2

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