请教:am3354的GPIO:GPMC_D7-GPMC_D0能做输出用吗,我在board-am335xevm.c文件中配置
{"gpmc_ad7.gpio1_7", OMAP_MUX_MODE7 | AM33XX_PIN_OUTPUT},
{"gpmc_ad6.gpio1_6", OMAP_MUX_MODE7 | AM33XX_PIN_OUTPUT},
{"gpmc_ad5.gpio1_5", OMAP_MUX_MODE7 | AM33XX_PIN_OUTPUT},
{"gpmc_ad4.gpio1_4", OMAP_MUX_MODE7 | AM33XX_PIN_OUTPUT},
用来控制继电器,但是控制不了,有人帮忙回答一下吗?