вторник, 24 марта 2015 г., 14:02:27 UTC+6 пользователь Willi Gnilke написал: > Thank you for this quick answer, > Yes, the PcDuino has a battery connector and battery mode works very well. > I understand the procedure you described for wakeup. Provided that the > Suspend code in the sunxi-3.4 is working I have to go into uboot to prevent > it from cold restart/initialisation. This seems difficult. > > Certainly I must start with a stripped "serial console only" version of linux. > Is there anyone in the forum, Hans de Goede has done many commits, who has > some expirience in this field? > Anybody who can say what already works and what not? Hello.
It does not work now. sun7i has two standby modes: 1.normal standby It is very similar to standby on A10.It works on sdk lichee kernel even with u-boot on sdcard, because it does not power off SoC, just only enables self-refresh and wait. It is enough to make suspend work. However it does not work in sunxi-3.4 for some unknown reason. System hangs when enabling DRAM self-refresh mode, so reclocking DRAM at runtime on sunxi-3.4 is now impossible to. 2. super standby Super standby code enables DRAM self-reforesh mode and shutting down SoC. So it requires support in bootloader and all drivers. It is very similar to suspend-to-disk and support of it in other drivers required. I think that suspend-to-disk will be more useful on boards with external power and it easier to implement in mainline. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
