1Freescale mx25 TS conversion queue module 2 3mx25 touchscreen conversion queue module which controls the ADC unit of the 4mx25 for attached touchscreens. 5 6Required properties: 7 - compatible: Should be "fsl,imx25-tcq". 8 - reg: Memory range of the device. 9 - interrupts: Should be the interrupt number associated with this module within 10 the tscadc unit (<0>). 11 - fsl,wires: Should be '<4>' or '<5>' 12 13Optional properties: 14 - fsl,pen-debounce-ns: Pen debounce time in nanoseconds. 15 - fsl,pen-threshold: Pen-down threshold for the touchscreen. This is a value 16 between 1 and 4096. It is the ratio between the internal reference voltage 17 and the measured voltage after the plate was precharged. Resistance between 18 plates and therefore the voltage decreases with pressure so that a smaller 19 value is equivalent to a higher pressure. 20 - fsl,settling-time-ns: Settling time in nanoseconds. The settling time is before 21 the actual touch detection to wait for an even charge distribution in the 22 plate. 23 24This device includes two conversion queues which can be added as subnodes. 25The first queue is for the touchscreen, the second for general purpose ADC. 26 27Example: 28 tsc: tcq@50030400 { 29 compatible = "fsl,imx25-tcq"; 30 reg = <0x50030400 0x60>; 31 interrupt-parent = <&tscadc>; 32 interrupts = <0>; 33 fsl,wires = <4>; 34 }; 35