I found that I was missing some rtc related kernel configs: CONFIG_RTC_HCTOSYS=y CONFIG_RTC_HCTOSYS_DEVICE="rtc" CONFIG_RTC_INTF_SYSFS=y CONFIG_RTC_INTF_PROC=y CONFIG_RTC_INTF_DEV=y after adding these, I got both rtc and alarm devices.
I have another problem now... I can't find where network time is being set? I found that SntpClient "requestTime" is called only from ThrottleService and GpsLocationProvider. These two modules get the current time from Internet. "SystemClock.setCurrentTimeMillis" is only called from GsmServiceStateTracker and AlarmManagerService but I can't find how these functions get called after getting time from the net. On Sep 14, 10:31 am, extrapedestrian <[email protected]> wrote: > Yes, I have slightly different: > > CONFIG_ANDROID_POWER_ALARM=y > > In kernel\drivers\staging\android\Makefile > obj-$(CONFIG_ANDROID_POWER_ALARM) +=alarm.o > > and in Kconfig > > config ANDROID_POWER > bool "Android power driver" > depends on PM && RTC_CLASS > default n > > config ANDROID_POWER_ALARM > bool "Androidalarmdriver" > depends on ANDROID_POWER > default y > > Andalarm.o driver is built, and registered on kernel boot. > > On Sep 14, 5:21 am, Liu Xin <[email protected]> wrote: > > > > > > > > > oh, you need to switch on in config file to enable androidalarm. Did you do > > that in .config? > > CONFIG_RTC_INTF_ALARM=y > > > kernel/driver/rtc/Makefile > > rtc-core-$(CONFIG_RTC_INTF_ALARM) +=alarm.o > > > --lx > > > On Tue, Sep 13, 2011 at 9:19 PM, extrapedestrian <[email protected] > > > > wrote: > > > im not saying android uses rtc. > > > im saying /dev/alarmneeds rtc device. like I said in first post, i > > > added kernel patchalarm.c andalarm.h, driver is registered on kernel > > > boot, but I don't get /dev/alarmand /dev/rtc* device nodes. Do you > > > know why /dev/alarmis not created? > > > > best regards, > > > Petar Bajic > > > > On Sep 13, 1:47 pm, Liu Xin <[email protected]> wrote: > > > > no. we have /dev/rtc0 > > > > # ls -l /dev/rtc* > > > > crw------- root root 254, 0 2011-09-13 19:32 rtc0 > > > > > again, android doesn't use rtc directly. it sets current time by syscall > > > > gettimeofday and /dev/alarm > > > > > refer to java API JNI: > > > > dalvik/vm/native/java_lang_System.c > > > > > or android API JNI: > > > > frameworks/base/core/jni/android_os_SystemClock.cpp > > > > which calls SystemClock.cpp & Timers.cpp > > > > > thanks > > > > --lx > > > > On Mon, Sep 12, 2011 at 9:24 PM, extrapedestrian < > > > [email protected] > > > > > > wrote: > > > > > do you have /dev/rtc on your platform? > > > > > > On Sep 9, 4:30 pm, Xin Liu <[email protected]> wrote: > > > > > > I don't think so . Androidalarmdoesn't assume that your CPUs have > > > RTC. > > > > > we use timer to do the same job. > > > > > > > --lx > > > > > > > 在 2011-9-9，下午3:41， extrapedestrian 写道： > > > > > > > > I foundalarmis platform driver that needs rtc device. Our board > > > > > > -- > > > > > unsubscribe: [email protected] > > > > > website:http://groups.google.com/group/android-porting > > > > -- > > > unsubscribe: [email protected] > > > website:http://groups.google.com/group/android-porting -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
