From 352a4ae95f029633010996574a9fa5d11e7adc24 Mon Sep 17 00:00:00 2001 From: "Patil, Rachna" Date: Thu, 24 Jan 2013 03:45:08 +0000 Subject: [PATCH 22/51] MFD: ti_am335x_tscadc: add device tree binding information Signed-off-by: Patil, Rachna --- .../devicetree/bindings/mfd/ti_am335x_tscadc.txt | 52 ++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt diff --git a/Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt b/Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt new file mode 100644 index 0000000..0100771 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt @@ -0,0 +1,52 @@ +Texas Instruments - TSC / ADC multi-functional device + +ti_tscadc is a multi-function device with touchscreen and ADC on chip. +This document describes the binding for mfd device. + +Required properties: +- compatible: "ti,ti-tscadc" +- reg: Specifies the address of MFD block +- interrupts: IRQ line connected to the main SoC +- interrupt-parent: The parent interrupt controller + +Optional properties: +- ti,hwmods: Hardware information related to TSC/ADC MFD device + +Sub-nodes: +Device Description +------ ----------- +tsc Touchscreen +adc Analog to digital converter + +Sub-node device required properties: +tsc: +- ti,wires: 4/5/8 wire touchscreen support on the platform. +- ti,x-plate-resistance: X plate resistance. +- ti,steps-to-configure: A step is configured to read a single co-ordinate value, + can be applied more number of times for better results. +- ti,wire-config: Order for connecting wires on touchscreen. + +adc: +- ti,adc-channels: Number of ADC channels used. + +Example: + + tscadc: tscadc@44e0d000 { + compatible = "ti,ti-tscadc"; + reg = <0x44e0d000 0x1000>; + + interrupt-parent = <&intc>; + interrupts = <16>; + ti,hwmods = "adc_tsc"; + + tsc { + ti,wires = <4>; + ti,x-plate-resistance = <200>; + ti,steps-to-configure = <5>; + ti,wire-config = <0x00 0x11 0x22 0x33>; + }; + + adc { + ti,adc-channels = <4>; + }; + }; -- 1.7.10.4