[PATCH v6 1/8] ARM: dt: Binding documentation for imx25 ADC/TSC

[Markus Pargmann <mpa@xxxxxxxxxxxxxx>]

This documentation describes the devicetree bindings for the
ADC/Touchscreen unit of the i.MX25 SoC.

Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
---

Notes:
    Changes in v6:
     - Removed adc-ref property and replaced it with refp and refn for positive and
       negative references. The properties are optional now as the default
       behaviour is a positive internal reference voltage and ADC GND as negative
       reference.

 .../devicetree/bindings/mfd/fsl-imx25-tsadc.txt    | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/fsl-imx25-tsadc.txt

diff --git a/Documentation/devicetree/bindings/mfd/fsl-imx25-tsadc.txt b/Documentation/devicetree/bindings/mfd/fsl-imx25-tsadc.txt
new file mode 100644
index 000000000000..a857af0eb68c
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/fsl-imx25-tsadc.txt
@@ -0,0 +1,46 @@
+Freescale mx25 ADC/TSC multifunction device
+
+This device combines two general purpose conversion queues one used for general
+ADC and the other used for touchscreens.
+
+Required properties:
+ - compatible: Should be "fsl,imx25-tsadc".
+ - reg: Memory range of the device.
+ - interrupts: Interrupt for this device as described in
+   interrupts/interrupts.txt
+ - clocks: An 'ipg' clock defined as described in clocks/clock.txt
+ - interrupt-controller: This device is an interrupt controller. It controls
+   the interrupts of both conversion queues.
+ - #interrupt-cells: Should be '<1>'.
+ - #address-cells: Should be '<1>'.
+ - #size-cells: Should be '<1>'.
+ - ranges
+
+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:
+	tscadc: tscadc@50030000 {
+		compatible = "fsl,imx25-tsadc";
+		reg = <0x50030000 0xc>;
+		interrupts = <46>;
+		clocks = <&clks 119>;
+		clock-names = "ipg";
+		interrupt-controller;
+		#interrupt-cells = <1>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		tsc: tcq@50030400 {
+			compatible = "fsl,imx25-tcq";
+			reg = <0x50030400 0x60>;
+			...
+		};
+
+		adc: gcq@50030800 {
+			compatible = "fsl,imx25-gcq";
+			reg = <0x50030800 0x60>;
+			...
+		};
+	};
-- 
2.1.4

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