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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