| Allwinner SoCs' GPADC Device Tree bindings |
| ------------------------------------------ |
| The Allwinner SoCs all have an ADC that can also act as a thermal sensor |
| and sometimes as a touchscreen controller. |
| |
| Required properties: |
| - compatible: "allwinner,sun8i-a33-ths", |
| - reg: mmio address range of the chip, |
| - #thermal-sensor-cells: shall be 0, |
| - #io-channel-cells: shall be 0, |
| |
| Example: |
| ths: ths@01c25000 { |
| compatible = "allwinner,sun8i-a33-ths"; |
| reg = <0x01c25000 0x100>; |
| #thermal-sensor-cells = <0>; |
| #io-channel-cells = <0>; |
| }; |
| |
| sun4i, sun5i and sun6i SoCs are also supported via the older binding: |
| |
| sun4i resistive touchscreen controller |
| -------------------------------------- |
| |
| Required properties: |
| - compatible: "allwinner,sun4i-a10-ts", "allwinner,sun5i-a13-ts" or |
| "allwinner,sun6i-a31-ts" |
| - reg: mmio address range of the chip |
| - interrupts: interrupt to which the chip is connected |
| - #thermal-sensor-cells: shall be 0 |
| |
| Optional properties: |
| - allwinner,ts-attached : boolean indicating that an actual touchscreen |
| is attached to the controller |
| - allwinner,tp-sensitive-adjust : integer (4 bits) |
| adjust sensitivity of pen down detection |
| between 0 (least sensitive) and 15 |
| (defaults to 15) |
| - allwinner,filter-type : integer (2 bits) |
| select median and averaging filter |
| samples used for median / averaging filter |
| 0: 4/2 |
| 1: 5/3 |
| 2: 8/4 |
| 3: 16/8 |
| (defaults to 1) |
| |
| Example: |
| |
| rtp: rtp@01c25000 { |
| compatible = "allwinner,sun4i-a10-ts"; |
| reg = <0x01c25000 0x100>; |
| interrupts = <29>; |
| allwinner,ts-attached; |
| #thermal-sensor-cells = <0>; |
| /* sensitive/noisy touch panel */ |
| allwinner,tp-sensitive-adjust = <0>; |
| allwinner,filter-type = <3>; |
| }; |
