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Linux debugfs使用分享 软件查看gpio状态
在调试中加入debugfs有时可以起到事半功倍的效果：
adb shell #mkdir /data/debug #mount -t debugfs debugfs /data/debug #cd /data/debug 查看gpio状态 root@:/data/debugfs # cat gpio GPIOs 0-15: gpio-0 (front_camera_rst ) out lo GPIOs 16-42: gpio-17 (tsl2771_int ) in hi gpio-26 (ctp_reset ) out hi gpio-29 (front_camera_pwd ) out hi gpio-31 (gpio_kp_out ) out lo gpio-32 (gpio_kp_out ) out lo gpio-35 (GPIO_E186_POWER ) in lo gpio-36 (gpio_kp_in ) in hi gpio-37 (gpio_kp_in ) in hi gpio-42 (hs_sw ) in hi GPIOs 43-67: gpio-48 (ctp_irq ) in hi gpio-60 (qup_scl ) in hi gpio-61 (qup_sda ) in hi GPIOs 68-94: gpio-76 (lis3dh_acc_int ) in lo gpio-82 ([auto] ) out hi gpio-85 (bahama sys_rst_n ) in lo gpio-94 ([auto] ) out hi GPIOs 95-106: gpio-97 (MDP_VSYNC ) in lo GPIOs 107-132: gpio-107 (ctp_power ) in hi gpio-115 (GPIO_E186_WAKEUP ) in lo gpio-131 (qup_scl ) in hi gpio-132 (qup_sda ) in hi 查看regulator root@android:/data/debugfs # cd regulator/ dummy/ ldo03/ ldo06/ ldo09/ ldo12/ ldo15/ ldo18/ smps1/ smps4/ ldo01/ ldo04/ ldo07/ ldo10/ ldo13/ ldo16/ ldo19/ smps2/ ldo02/ ldo05/ ldo08/ ldo11/ ldo14/ ldo17/ ncp/ smps3/ root@android:/data/debugfs # cat regulator/ldo10/voltage 3000000 查看clk root@android:/ # cat /data/debugfs/clk/ adm_clk/ ebi_mddi_clk/ sdc1_p_clk/ adsp_clk/ ebi_vfe_clk/ sdc2_clk/ ahb_m_clk/ ecodec_clk/ sdc2_p_clk/ ahb_s_clk/ gp_clk/ sdc3_clk/ cam_m_clk/ grp_3d_clk/ sdc3_p_clk/ csi0_clk/ grp_3d_p_clk/ sdc4_clk/ csi0_p_clk/ gsbi1_qup_clk/ sdc4_p_clk/ csi0_vfe_clk/ gsbi1_qup_p_clk/ tsif_p_clk/ csi1_clk/ gsbi2_qup_clk/ tsif_ref_clk/ csi1_p_clk/ gsbi2_qup_p_clk/ uart1_clk/ csi1_vfe_clk/ icodec_rx_clk/ uart1dm_clk/ debug_suspend icodec_tx_clk/ uart2_clk/ dsi_byte_clk/ imem_clk/ uart2dm_clk/ dsi_clk/ mdp_clk/ usb_hs2_clk/ dsi_esc_clk/ mdp_dsi_p_clk/ usb_hs_clk/ dsi_pixel_clk/ mdp_lcdc_pad_pclk_clk/ usb_hs_core_clk/ dsi_ref_clk/ mdp_lcdc_pclk_clk/ usb_hs_p_clk/ ebi1_clk/ mdp_vsync_clk/ usb_phy_clk/ ebi2_clk/ pbus_clk/ vdc_clk/ ebi_acpu_clk/ pcm_clk/ vfe_clk/ ebi_adm_clk/ pmdh_clk/ vfe_mdc_clk/ ebi_grp_3d_clk/ sdac_clk/ ebi_lcdc_clk/ sdc1_clk/root@android:/ #
cat /data/debugfs/clk/mdp_clk/rate 200000000转载地址：http://ivomi.baihongyu.com/