PM8916 Codec Hardware Multibutton Headset Control (MBHC)
这个是NC和NO的区别在det脚的初始的状态。qcom,msm-mbhc-hphl-swh=;拉低中断,简单的理解就是低电平检测还是高电平检测staticconststructwcd_mbhc_intrintr_ids={.mbhc_sw_intr=MSM8X16_WCD_IRQ_MBHC_HS_DET,.mbhc_btn_press_intr=MSM8X16_WCD_IRQ_MBHC_PRESS