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am335x 触摸屏触摸不准确及漂移问题

在使用am335x连接4线电阻屏时,触摸板出现触摸不准确以及漂移的情况,AIN0-3的电压在1.8v以内,ts_calibrate校准不起作用,ts_test 测试有xyz坐标输出,设备树配置如下:

&tscadc {
status = "okay";
tsc {
ti,wires = <4>;
ti,x-plate-resistance = <200>;
ti,coordinate-readouts = <5>;
ti,wire-config = <0x00 0x11 0x22 0x33>;
ti,charge-delay = <0x400>;
};

adc {
ti,adc-channels = <4 5 6 7>;
};
};

请问下有什么办法可以定位问题所在,谢谢了