1sun4i resistive touchscreen controller
2--------------------------------------
3
4Required properties:
5 - compatible: "allwinner,sun4i-a10-ts", "allwinner,sun5i-a13-ts" or
6   "allwinner,sun6i-a31-ts"
7 - reg: mmio address range of the chip
8 - interrupts: interrupt to which the chip is connected
9 - #thermal-sensor-cells: shall be 0
10
11Optional properties:
12 - allwinner,ts-attached	 : boolean indicating that an actual touchscreen
13				   is attached to the controller
14 - allwinner,tp-sensitive-adjust : integer (4 bits)
15				   adjust sensitivity of pen down detection
16				   between 0 (least sensitive) and 15
17				   (defaults to 15)
18 - allwinner,filter-type	 : integer (2 bits)
19				   select median and averaging filter
20				   samples used for median / averaging filter
21				   0: 4/2
22				   1: 5/3
23				   2: 8/4
24				   3: 16/8
25				   (defaults to 1)
26
27Example:
28
29	rtp: rtp@01c25000 {
30		compatible = "allwinner,sun4i-a10-ts";
31		reg = <0x01c25000 0x100>;
32		interrupts = <29>;
33		allwinner,ts-attached;
34		#thermal-sensor-cells = <0>;
35		/* sensitive/noisy touch panel */
36		allwinner,tp-sensitive-adjust = <0>;
37		allwinner,filter-type = <3>;
38	};
39