android双触摸屏原理,android 双触摸屏（touchscreen）实现--kernel driver

背景

本文主要实现一个Android系统，调试两个相同的TP设备，使用同一个TP的驱动。

最终实现结果，两个TP都可以控制Android，正常报点。

实现过程：

硬件连接介绍：

软件实现：

在dtsi文件添加两个TP设备(名字不一样)：

LA.UM.5.6\kernel\msm-3.18\arch\arm\boot\dts\qcom\msm8937-pmi8937-qrd-sku2.dtsi

&soc {

i2c@78b6000 {

status= "ok";

goodix@5d{

compatible = "goodix,gt9xx_2";

reg= <0x5d>;

interrupt-parent= ;

interrupts = <62 0x00>;

reset-gpios = ;

interrupt-gpios= ;

/*avdd-supply= ;*/

vdd-supply= ;

vcc_i2c-supply= ;

/*pins used by touchscreen */

pinctrl-names= "pmx_ts_active",

"pmx_ts_suspend",

"pmx_ts_release";

pinctrl-0= ;

pinctrl-1= ;

pinctrl-2= ;

goodix,i2c-pull-up;

goodix,no-force-update;

goodix,panel-coords= <0 0 1080 1920>;

goodix,display-coords= <0 0 1080 1920>;

goodix,button-map=<139 172 158>;

goodix,product-id0 ="9147";

goodix,product-id1= "915L";

goodix,fw_name= "gtp_fw.bin";

//goodix,enable-power-off;

goodix,cfg-data1= [

00D0 02 38 04 0A 05 00 01 08

2805 50 32 03 05 00 00 00 00

0000 00 00 00 00 00 8C 2C 0E

1715 31 0D 00 00 01 9B 03 1D

0000 00 00 00 00 00 00 00 00

0000 00 00 00 00 00 00 00 00

0000 00 00 00 00 00 00 00 00

0000 00 00 00 00 00 00 00 00

0000 00 00 00 00 00 00 00 00

0000 00 00 00 00 00 00 00 00

0000 00 00 00 00 00 00 00 00

0000 02 04 06 08 0A 0C 0E 10

1214 16 18 1A 1C 00 00 00 00

0000 00 00 00 00 00 00 00 00

0000 00 02 04 06 08 0A 0C 0F

1012 13 14 28 26 24 22 21