如何查看gpio 使用状态,以及被那些模块request

mkdir /data/debug

mount -t debugfs debugfs /data/debug

255|root@msm8610_t530_ee7736:/data/debug # cat gpio

cat gpio

GPIOs 0-101, platform/fd510000.gpio, msmgpio:

gpio-0 (rmi4_reset_gpio ) out hi

gpio-1 (rmi4_irq_gpio ) in hi

gpio-6 (pw_pwr ) out lo

gpio-7 (nfc_ven ) out lo

gpio-8 (reset ) out hi

gpio-18 (FLASH_EN ) in lo

gpio-19 (FLASH_NOW ) in lo

gpio-23 (wcnss_wlan ) in lo

gpio-24 (wcnss_wlan ) in lo

gpio-25 (wcnss_wlan ) in lo

gpio-26 (wcnss_wlan ) in lo

gpio-27 (wcnss_wlan ) in lo

gpio-41 (disp_rst_n ) in hi

gpio-42 (
sm_sdcc.2 cd ) in lo

gpio-56 (BD_EN ) in lo

gpio-60 (BD_UART_EN ) in lo

gpio-72 (volume_up ) in hi

gpio-74 (camera_focus ) in hi

gpio-75 (nfc_firm ) out lo

gpio-80 (ltr558 ) in hi

gpio-83 (volume_down ) in hi

gpio-96 (nfc_irq ) in lo

GPIOs 570-571, spmi/qpnp-pin-f4108a00, pm8110-mpp:

GPIOs 572-575, spmi/qpnp-pin-f4108800, pm8110-gpio:

GPIOs 576-607, platform/qcom,smp2pgpio-ssr-smp2p-4-out.25, master-kernel:

GPIOs 608-639, platform/qcom,smp2pgpio-ssr-smp2p-4-in.24, slave-kernel:

GPIOs 640-671, platform/qcom,smp2pgpio-smp2p-4-out.23, smp2p:

GPIOs 672-703, platform/qcom,smp2pgpio-smp2p-4-in.21, smp2p:

GPIOs 704-735, platform/qcom,smp2pgpio-ssr-smp2p-2-out.20, master-kernel:

GPIOs 736-767, platform/qcom,smp2pgpio-ssr-smp2p-2-in.19, slave-kernel:

GPIOs 768-799, platform/qcom,smp2pgpio-smp2p-2-out.17, smp2p:

GPIOs 800-831, platform/qcom,smp2pgpio-smp2p-2-in.15, smp2p:

GPIOs 832-863, platform/qcom,smp2pgpio-ssr-smp2p-1-out.14, master-kernel:

GPIOs 864-895, platform/qcom,smp2pgpio-ssr-smp2p-1-in.13, slave-kernel:

GPIOs 896-927, platform/qcom,smp2pgpio-smp2p-1-out.11, smp2p:

GPIOs 928-959, platform/qcom,smp2pgpio-smp2p-1-in.9, smp2p:

GPIOs 960-991, platform/qcom,smp2pgpio-smp2p-7-out.7, smp2p: