检测部分：对比两个宏：
CONFIG_ACCDET_EINT=y
# CONFIG_ACCDET_EINT_IRQ is not set
在kernel-3.18/drivers/misc/mediatek/accdet/Kconfig:
config ACCDET_EINT tristate "MediaTek ACCDET driver" ---help--- ACCDET EINT support for MediaTek SOC If you want to use MediaTek ACCDET EINT from PMIC ACCDET itself, say Y or M here. If unsure, say N. config ACCDET_EINT_IRQ tristate "MediaTek ACCDET driver" ---help--- ACCDET EINT support for MediaTek SOC If you want to use MediaTek ACCDET EINT from AP GPIO, say Y or M here. If unsure, say N.
----------------