#linux-sunxi on 2020-02-18 — irc logs at freenode.irclog.whitequark.org

2018-08-03 10:18 rellla changed the topic of #linux-sunxi to: Allwinner/sunxi /development discussion - did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait! - https://github.com/linux-sunxi/ - Logs at http://irclog.whitequark.org/linux-sunxi - *only registered users can talk*

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00:02 <kubast2> How much power can I expect to pull with A13 (sleep mode?) super standby ? As in how much should I expect AVCC and the dram chip to pull?[I assume cpu registers+cache+internal sram +dram being in refresh mode/being powered to not lose power?]

00:03 <kubast2> looking at a datasheet, seems to me like a sleep mode?

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00:04 <kubast2> but more dependent on a pmu to wake up the A13 rather than some sorta usb/ps2/power button interrupt like on pcs?

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00:09 <kubast2> yeah I think that overall I will end up cheaper by buying a A13 system on module than making my own pcb

00:09 <kubast2> I mean I sure can salvage parts from sodimms/dimms and stuff, custom pcbs don't seem really expensive to buy

00:11 <kubast2> but I think the most expensive part will be desoldering/soldering the dimms

00:11 <kubast2> and soldering the a13 small pins

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14:06 <alitheguy> Hi, where can i get the 5.6 kernel?

14:06 <mru> from the future

14:07 <KotCzarny> ~x-files theme cue~

14:07 <kilobyte> unless you'd be satisfied with -rc2

14:08 <alitheguy> yes, how do i get rc2?

14:08 <KotCzarny> try kernel.org

14:08 <KotCzarny> via browser

14:14 <alitheguy> how can i get the 5.6 rc2 kernel on Armbian + pine64?

14:15 <KotCzarny> enter proper source archive in the build script, probably

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14:38 <fALSO> alitheguy, ?

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15:10 <montjoie> alitheguy source or binary kernel ?

15:11 <fALSO> he probably wants a binary kernel with all the patches of armbian but on 5.6

15:11 <fALSO> and ready to use

15:11 <fALSO> ;-)

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18:35 <megi> wens: hmm, drivevbus handling seems wrong in the mainline

18:35 <megi> bsp code: https://megous.com/dl/tmp/a8c623d5f537f5f6.png

18:35 <megi> mainline: https://megous.com/dl/tmp/4841d3494dc9f17e.png

18:36 <megi> mainline clears the bit

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18:37 <megi> so drivevbus is not in effect, the N_VBUSEN floats and randomly turns vbus on/off and my tablet really doesn't like it :)

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18:50 <megi> looks like this was wrong all along for all PMICs

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19:08 <megi> lolz so in axp803, it's documented https://megous.com/dl/tmp/5a93c0432f5f690e.png

19:08 <megi> as 0 = output

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19:17 <megi> though power driver documentation from allwinner states that https://megous.com/dl/tmp/456ac18463ab9145.png 1 = output and my fex file has 1 there which matches the schematic and will set the bit to enable N_VBUSEN as output

19:17 <megi> of course this is undocumented in the AXP813 pdf

19:18 <megi> I guess, I'll just try changing it to match BSP code to see if it will solve all my problems

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19:52 <willmore> megi, is the the same as: https://linux-sunxi.org/AXP221

19:54 <willmore> That has 0 as output, 1 as input.

19:54 <megi> bsp for does the exact oposite

19:54 <megi> for axp813

19:55 <megi> I'm just trying to figure out what happens in reality, now

19:56 <willmore> Understood. Time to stick an oscilliscope probe on a pin?

19:56 <megi> I just put a USB led light over usb-otg :)

19:56 <willmore> :)

19:57 <megi> and got sidetracked by wifi driver generating 5000 interrupts per second :)

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22:48 <megi> ok so the bsp code is wrong/weird I guess

22:49 <megi> after fixing a bunch of other issues (id-det pullup not being where it is in schematic, and link to a usb0_vbus_power-supply, it seems to work)

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22:53 <megi> and it was the damn wifi causing the burning smell probably :)

22:54 <megi> the constant busywork from the interrupts overheated the CPU

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23:59 <lvrp16> haha interrupt overheating a cpu, that's gonna be the next pseudo hardware vulnerability