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问题描述：使用imx6sl的linux内核，里面配置有ads7846的驱动程序，首先是触摸屏不准，其次灵敏度不高。通过优化后，触摸稍微准点。效果不明显。
期望效果：IMX6SL+ADS7846 触控能否优化做到手指触摸有效。这个方案是否可行。
