Am 21.10.2015 um 12:16 schrieb Javier Martinez Canillas: > Hello Alim, > > On 10/21/2015 08:09 AM, Alim Akhtar wrote: > > [snip] > >>>>>> >>>>>> Hi Alim, >>>>>> >>>>>> I have installed your patch set above with git am on top of >>>>>> 4.3.0-rc6-00108-gce1fad2 torvalds/linux of today >>>>>> with make exynos_defconfig on Odroid U3. >>>>>> >>>>> which exynos soc Odroid U3 uses? >>>>> >>>> OK, I can see its uses exynos4412 and exynos4412-odroidu3.dts does >>>> include exynos4.dtsi, >>>> so these should have worked. >>>> >>>>>> "halt -p" worked (power 0.0W). >>>>>> "reboot" got stuck at 0.5W. >>>>>> >>>>> reboot stuck mean system does not reboot any more? >>> >>> It freezes when going for reboot. >>> Have to power off/on to boot again. >>> >>> Btw I use an mmc, not an sd-card. >>> No other HW connected, just LAN-cable. >>> Bootloader is u-boot v2015.10. >>> o >> Have checked on 4.3.0-rc6-00006-gd03c139e7e77, still works on peach boards. >> Sorry I don't have Odroid U3 with me, may be Javier or Krzysztof might help here to check whats wrong. To me its looks more of a board specific issue for now. >> > > Krzysztof has an Odroid XU3 lite and I have an Odroid XU4, both uses an > Exynos5422 so we can't check what's wrong with Odroid U3 (Exynos4412). > > Having said that I think I know what is the issue here. Markus said that > he is using an eMMC instead of an uSD (which is what I used and my guess > is that Krzysztof did too). > > Now, there is a subtle difference between the old PMU restart handler > and the syscon-reboot one, and that is the restart handler priorities: > > notifier priority > ------------------------------------ > pmu_restart_notify 128 > mmc_pwrseq_emmc_reset_nb 129 > syscon_restart_handle 192 > > So, without Alim's patches, first the eMMC reset handler will be called > and then the PMU restart handler but after his series, the syscon reset > handler has a higher priority so the eMMC reset will never be called. > > But the problem is that the eMMC card has to be properly reset on system > restart to allow the SoC iROM to be able to read the bootloader from the > eMMC since the iROM doesn't have restart logic and the card shouldn't be > left in an unknown state. > > So the problem here is not that the system is not being reset (that I > think that works) but that on reboot, the system is not able to boot > again since the ROM is not able to read the second stage bootloader. > > Markus, > > Can you please test following patch [0] on top of Alim's series? If that > works then it should either be part of Alim's series or the patches will > have to wait until that patch lands into mainline. I don't have an eMMC > to test it in XU4 but I'm pretty confident that it will solve the issue. Hi Javier, your patch fixes the issue, reboot works now on U3. Tested-by: Markus Reichl <m.reichl@xxxxxxxxxxxxx> Thanks, -- Markus > > Best regards, > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
