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DM8168的DVRRDK的uboot如何控制GPIO

  Ti的各位专家:

                           请教一下在uboot阶段如何使用GPIO,调用什么接口,我使用omap_set_gpio_direction() omap_get_gpio_datain()这一类接口好像没有效果。

                  因为开始要读gpio状态,麻烦告知使用什么接口来操纵GPIO,谢谢!