[转载] [GPIO]获取系统睡眠时GPIO状态的方法

 

[FAQ05342] [GPIO]获取系统睡眠时GPIO状态的方法

Platform:MT6575MT6577MT6589

Branch:JB2JBICS2ICS

FAQ Content

可以透過下指令的方式再 把 mobile log 抓回來看

1.開機後先執行下面這道指令
MT6589: echo 1 > /sys/module/mt_sleep/parameters/slp_dump_gpio

MT657X: echo 1 > /sys/module/mt657x_sleep/parameters/slp_dump_gpio

其中MT657X,表示MT6577、MT6575等
2.確認 Mobile log 已經打開
3.USB 拔掉
4.按幾次power key  suspend /resume
5.之後把 mobile log 抓回來
在kernel log里搜尋一下 Chip_pm_enter就可以找到如下面红色字体内容显示的 GPIO pin 的狀態

MT6589：

<5>[  171.745746]-0)[SLP] @@@@@@@@@@@@@@@@@@@@
<2>[  171.745756]-0)[SLP] Chip_pm_enter
<5>[  171.745762]-0)[SLP] @@@@@@@@@@@@@@@@@@@@
<4>[  171.745770]-0)PIN: [MODE] [PULL_SEL] [DIN] [DOUT] [PULL EN] [DIR] [INV] [IES]
<4>[  171.745787]-0)idx =   0: 1 0 0 0 1 0 0 1
<4>[  171.745799]-0)idx =   1: 1 0 0 0 1 0 0 1
<4>[  171.745811]-0)idx =   2: 1 0 0 0 1 0 0 1
<4>[  171.745823]-0)idx =   3: 1 0 0 0 1 0 0 1
<4>[  171.745835]-0)idx =   4: 1 0 1 1 0 1 0 1
<4>[  171.745847]-0)idx =   5: 1 0 1 0 1 0 0 1
<4>[  171.745859]-0)idx =   6: 1 0 0 0 1 1 0 1
<4>[  171.745871]-0)idx =   7: 1 0 0 0 1 0 0 1
<4>[  171.745883]-0)idx =   8: 1 0 0 0 1 0 0 1
<4>[  171.745895]-0)idx =   9: 1 0 0 0 1 0 0 1
<4>[  171.745907]-0)idx =  10: 1 0 0 0 1 0 0 1
<4>[  171.745919]-0)idx =  11: 0 0 0 0 1 0 0 1

...

 

或者MT657X：

 

<5>[ 4584.601736] (0)[32:kworker/u:1][Power/Sleep] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
<5>[ 4584.601748] (0)[32:kworker/u:1][Power/Sleep] _Chip_pm_enter @@@@@@@@@@@@@@@@@@@@@@
<5>[ 4584.601759] (0)[32:kworker/u:1][Power/Sleep]  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
<4>[ 4584.601774] (0)[32:kworker/u:1]idx =   0: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601788] (0)[32:kworker/u:1]idx =   1: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601802] (0)[32:kworker/u:1]idx =   2: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601816] (0)[32:kworker/u:1]idx =   3: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601830] (0)[32:kworker/u:1]idx =   4: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601843] (0)[32:kworker/u:1]idx =   5: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601857] (0)[32:kworker/u:1]idx =   6: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601870] (0)[32:kworker/u:1]idx =   7: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601883] (0)[32:kworker/u:1]idx =   8: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601897] (0)[32:kworker/u:1]idx =   9: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0
<4>[ 4584.601910] (0)[32:kworker/u:1]idx =  10: mode = 0, pullsel = 0, din = 0, dout = 0, pullen = 1, dir = 0, dinv = 0

...