1Allwinner SoCs' GPADC Device Tree bindings 2------------------------------------------ 3The Allwinner SoCs all have an ADC that can also act as a thermal sensor 4and sometimes as a touchscreen controller. 5 6Required properties: 7 - compatible: "allwinner,sun8i-a33-ths", 8 - reg: mmio address range of the chip, 9 - #thermal-sensor-cells: shall be 0, 10 - #io-channel-cells: shall be 0, 11 12Example: 13 ths: ths@1c25000 { 14 compatible = "allwinner,sun8i-a33-ths"; 15 reg = <0x01c25000 0x100>; 16 #thermal-sensor-cells = <0>; 17 #io-channel-cells = <0>; 18 }; 19 20sun4i, sun5i and sun6i SoCs are also supported via the older binding: 21 22sun4i resistive touchscreen controller 23-------------------------------------- 24 25Required properties: 26 - compatible: "allwinner,sun4i-a10-ts", "allwinner,sun5i-a13-ts" or 27 "allwinner,sun6i-a31-ts" 28 - reg: mmio address range of the chip 29 - interrupts: interrupt to which the chip is connected 30 - #thermal-sensor-cells: shall be 0 31 32Optional properties: 33 - allwinner,ts-attached : boolean indicating that an actual touchscreen 34 is attached to the controller 35 - allwinner,tp-sensitive-adjust : integer (4 bits) 36 adjust sensitivity of pen down detection 37 between 0 (least sensitive) and 15 38 (defaults to 15) 39 - allwinner,filter-type : integer (2 bits) 40 select median and averaging filter 41 samples used for median / averaging filter 42 0: 4/2 43 1: 5/3 44 2: 8/4 45 3: 16/8 46 (defaults to 1) 47 48Example: 49 50 rtp: rtp@1c25000 { 51 compatible = "allwinner,sun4i-a10-ts"; 52 reg = <0x01c25000 0x100>; 53 interrupts = <29>; 54 allwinner,ts-attached; 55 #thermal-sensor-cells = <0>; 56 /* sensitive/noisy touch panel */ 57 allwinner,tp-sensitive-adjust = <0>; 58 allwinner,filter-type = <3>; 59 }; 60