Look at drivers/rtc/rtc-omap.c omap_rtc_power_off_program()
Regards, John > On Apr 17, 2016, at 10:25 PM, evilwulfie <evilwul...@gmail.com> wrote: > > Where in the code do you set that timer ? > > > On 4/17/2016 7:50 PM, John Syne wrote: >> One more thing, the power down sequence uses the RTC framework (described >> earlier in this thread), so it will be possible to set a timer for the >> shutdown and the wait for the power to return event to cancel the timer. If >> the power on event does not occur, the shutdown will occur. >> >> Regards, >> John >> >> >> >> >>> On Apr 17, 2016, at 7:18 PM, evilwulfie < >>> <mailto:evilwul...@gmail.com>evilwul...@gmail.com >>> <mailto:evilwul...@gmail.com>> wrote: >>> >>> Interesting. Too bad if you want the battery to act as a UPS it cant some >>> how notify the kernel that AC has been removed >>> and have a routine to just chill a while to see if power comes back. >>> >>> Be nice to have a variable that is user settable for the time between loss >>> of AC and shutdown. >>> >>> As it is now it sees the AC removed, shuts down and no easy way to restart >>> on power restored. Requiring some other IC to monitor power >>> and then press the pwr_but to restart the processor. >>> >>> >>> >>> On 4/17/2016 7:10 PM, John Syne wrote: >>>> Yep, it is in the BB kernel: >>>> >>>> https://github.com/RobertCNelson/bb-kernel/blob/am33x-v4.1/patches/beaglebone/dts/0006-tps65217-Enable-KEY_POWER-press-on-AC-loss-PWR_BUT.patch >>>> >>>> <https://github.com/RobertCNelson/bb-kernel/blob/am33x-v4.1/patches/beaglebone/dts/0006-tps65217-Enable-KEY_POWER-press-on-AC-loss-PWR_BUT.patch> >>>> >>>> So again, on line 164 is the Interrupt routing. It is this line: >>>> >>>> + input_report_key(tps->pwr_but, KEY_POWER, >>>> >>>> + ~status_reg & TPS65217_STATUS_ACPWR); >>>> that send a power button pressed as an input key when the AC 5V power is >>>> removed. >>>> >>>> Regards, >>>> John >>>> >>>> >>>> >>>> >>>>> On Apr 17, 2016, at 4:52 PM, William Hermans <yyrk...@gmail.com >>>>> <mailto:yyrk...@gmail.com>> wrote: >>>>> >>>>> The real reason why our source trees do not match up. My source tree is >>>>> based on 4.1.x, and yours seems to be 3.8.x. The patch you showed above >>>>> would probably botch up my source tree . . . >>>>> >>>>> On Sun, Apr 17, 2016 at 4:33 PM, William Hermans < >>>>> <mailto:yyrk...@gmail.com>yyrk...@gmail.com <mailto:yyrk...@gmail.com>> >>>>> wrote: >>>>> Yeah I recognize that code from source code not written by TI employees. >>>>> The file is called tps65217_charger.c, and is written by an employee of >>>>> another company. >>>>> >>>>> Anyway, I think we're going to blow this off. The idea was to wait around >>>>> without power for 5 minutes, to see if power comes back up. Before >>>>> issuing a shutdown. 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