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本人新手，在lcdk上已经跑通了 TI linux SDK，现在想通过系统控制板载LED，发现无法控制，经询问发现需要从设备树里修改pinmux才行。
具体怎么修改，设备树的语法我有大致了解，但还是无从下手。希望大神指点一下，最后详细点。谢谢~
