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@android :/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