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https://source.android.com/ https://source.android.com/devices/ 阅读全文
posted @ 2018-06-21 18:22
wangchangruei
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epoll is a Linux kernel system call for a scalable I/O event notification mechanism, first introduced in version 2.5.44 of the Linux kernel mainline.[ 阅读全文
posted @ 2018-06-18 16:10
wangchangruei
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Platform MSM8917 PM8937 PMI8940 Parameters 1 battery charging voltage : qcom,float voltage mv = ; 2 battery recharge threshold : qcom,resume delta mv 阅读全文
posted @ 2018-05-31 17:47
wangchangruei
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HW MSM8917 PM8937 PMI8940 Question : Recently, I connect usb cable with 10V to the phone. Why does the phone still charging ? Why it not stop charging 阅读全文
posted @ 2018-05-30 16:12
wangchangruei
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http://trac.3du.me/grid/wiki/jazz/Performance_Tuning 阅读全文
posted @ 2018-05-27 15:48
wangchangruei
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Step1 : phone & pc connect the same wifi. Step2 : phone use usb cable to connect pc. Step 3 : Step 4 : Step 5 : Step 6 : Step 7 : Step 8 : Step 9 : di 阅读全文
posted @ 2018-05-25 17:42
wangchangruei
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1 A12.3 Macro Definition and Expansion A control line of the form \ define identifier token sequence causes the preprocessor to replace subsequent ins 阅读全文
posted @ 2018-05-23 17:45
wangchangruei
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Question : When you see the log "Flags mismatch irq ............", maybe you use the same irq number to register different interrupt handler . irq num 阅读全文
posted @ 2018-05-17 22:06
wangchangruei
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formal parameter : [3.16] object declared as part of a function declaration or definition that acquires a value on entry to the function, Example : in 阅读全文
posted @ 2018-05-14 17:30
wangchangruei
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What's pasting in above block ? It is often useful to merge two tokens into one while expanding macros. This is called token pasting or token concaten 阅读全文
posted @ 2018-05-12 18:21
wangchangruei
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