On Mon, Oct 22, 2012 at 01:21:37, Daniel Mack wrote: > On 19.10.2012 12:58, Mohammed, Afzal wrote: > > Hi Daniel, > > > > On Thu, Oct 18, 2012 at 22:03:13, Hiremath, Vaibhav wrote: > >> On Thu, Oct 18, 2012 at 21:49:44, Daniel Mack wrote: > >>> On 18.10.2012 18:12, Vaibhav Hiremath wrote: > > > >>>> It would be really helpful if you could test these patches and ack them. > > > >>> Ok, will do tomorrow. What's missing there is support for writing to the > >>> OMAP_RTC_OSC_REG (path 3/3 in my series). Would like me to rebase the > >>> functionality? I need thatkind of setup for my board ... > > > >> This is bit tricky and required more discussion before merging it, > >> let me reopen the old discussion which I had started some time back - > >> > >> > >> RTC OSC clock is required to configure clocksource systemtimer for the > >> kernel, and it is important when you get into PM related features. > >> > >> Please refer the below commit for more reference, > >> > >> http://marc.info/?l=u-boot&m=135057734713796&w=2 > > > > Newer version (v4) of omap rtc patches for am335x has been > > posted, "rtc: omap dt support (for am33xx)". > > In case you can test, please do it over the new series. > > > > You would need also need DT patch that adds DT node to > > test (it has been separated from the series as it is > > felt that it should not be part of same series), > > "arm/dts: am33xx rtc node" > > Agreed. I tested your patches and they do basically the same thing than > mine. You can take my > > Tested-by: Daniel Mack <zonque@xxxxxxxxx> > Thanks Daniel for testing these patches. > on all patches in this series except for 2/5 which I didn't test as I > don't have any Davinci platform. > > > If you are using mainline uboot, you would need the fix as > > mentioned by Vaibhav H (as in the link he provided above), > > expecting it to reach uboot mainline soon. > > > > If the above is being attempted to achieve in Kernel it > > would cause 2-3 seconds delay in boot time (else it had > > to be made a module), please refer link provided by > > Vaibhav H for more details. > > > > else you can do in current mainline uboot, > > > > mw.l 0x44e3e06c 0x83e70b13 > > mw.l 0x44e3e070 0x95a4f1e0 > > mw.b 0x44e3e054 0x48 > > > > and then boot kernel. > > I'm surprised that survives the kernel boot, but I'll give it a try. In > case you want to add that logic to the kernel as well, please copy me in > the discussion :) > > Certainly... Some background information for your reference, We had some discussion in the past on this, and we decided to make this as a fallback mechanism considering following scenarios - - System built with 32k crystal OSC, connected to RTC module - System without 32k crystal OSC, as RTC is not used. - Boot-Loader dependency for RTC clock enable (required for system-timer) So the fallback mechanism would be something similar - http://arago-project.org/git/projects/?p=linux-am33x.git;a=commit;h=58abec6ac010f4f8818caa4a52d16c4802e14acc Thanks, Vaibhav > Thanks, > Daniel > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
