On Mon, 6 Jan 2014 00:07:02 +0100 Carlo Caione <carlo.cai...@gmail.com> wrote:
> On Mon, Jan 6, 2014 at 12:04 AM, Olliver Schinagl <oli...@schinagl.nl> wrote: > > On 01/05/14 23:00, Siarhei Siamashka wrote: > >> > >> # cat /sys/devices/platform/sunxi-i2c.0/i2c-0/0-0034/axp20_regs > >> only power adapter : REG[0x0]=0xc1,REG[0x1]=0x10 > >> power adapter + miniusb : REG[0x0]=0xf9,REG[0x1]=0x10 > >> only miniusb : REG[0x0]=0x3d,REG[0x1]=0x70 > >> miniusb + lipo battery : REG[0x0]=0x3d,REG[0x1]=0x70 > >> power adapter + lipo battery : REG[0x0]=0xc5,REG[0x1]=0x70 > >> only lipo battery : REG[0x0]=0x1,REG[0x1]=0x30 > >> > >> Note: "only miniusb" and "miniusb + lipo battery" really have the > >> same AXP20 register values, that's not a typo. > > > > > > If you look in the AXP 202 (english, the 209 cn version MIGHT be different > > (i haven't looked) though Carlo/n01 may say what happens here. (ugly copy > > paste from pdf) > > Unfortunately I haven't touched the power subsystem yet. > I'll be more useful in a couple of days :) It's good to know that somebody is taking care of the power management in linux-sunxi. Thanks. About the AXP20 register values. Yes, I have found and checked the AXP202 manual. And the linux-sunxi wiki also explains these bits. It is just interesting how cubieboard2 and cubietruck set the bits there. And some of them seem to be a bit odd. For example, AXP in cubietruck seems to think that it has a battery and is charging it when only miniusb cable is connected. Cubieboard2 can't see any differences between the power sources at all and always has the same bits in these registers. So I got the data and dumped it to the mailing list, with the hope that other people may get some ideas about why this is happening and how to interpret it :) It would be also interesting to know how A10-OLinuXino-Lime behaves. Is it similar to cubietruck or cubieboard2 or maybe in some other way? The OLIMEX people have avoided this question so far. I guess they want us to just RTFM the schematics and stop asking silly questions ;) -- Best regards, Siarhei Siamashka -- 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 linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
