[OpenWrt-Devel] USB Hotplug

[John Crispin]

On 07/03/2016 15:00, Baptiste Clenet wrote:
> 2016-03-07 9:51 GMT+01:00 John Crispin <john at phrozen.org>:
>>
>>
>> On 07/03/2016 09:47, Baptiste Clenet wrote:
>>> 2016-03-04 18:24 GMT+01:00 John Crispin <john at phrozen.org>:
>>>>
>>>>
>>>> On 04/03/2016 17:50, Baptiste Clenet wrote:
>>>>> We don't use the current tree but a version from November.
>>>>> You're talking about this changeset:
>>>>> https://dev.openwrt.org/changeset/48749
>>>>>
>>>>> I will apply it and let you know if it is better.
>>>>>
>>>>>>>>>
>>>>
>>>>
>>>> yep, try adding that one please and see if that fixes the issue
>>>> _______________________________________________
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>>>> openwrt-devel at lists.openwrt.org
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>>>
>>> John, I chose Default profile for mt7688 board and it has built an
>>> image named "openwrt-ramips-mt7688-LinkIt7688-squashfs-sysupgrade.bin",
>>> so it used the LINKIT7688 dts instead of MT7628 dts.
>>>
>>> Concerning USB, I see the same behaviour, if the pendrive is plugged
>>> between the boot, it works and I can plug it in and out as much as I
>>> can, however, it the board boots and then I insert the pendrive, it is
>>> not detected (the pendrive's led switches on for 1/2sec and then
>>> switches off.
>>
>> seen this before while building pcbs .. so my money is on the following
>> theory: your power supply is failing to provide enough current quickly
>> enough for the USB to come up causing OC protection or similar to shut
>> it down. check your supply voltage of the usb port with a scope and you
>> will probably see it breakdown after that 1/2 s
> 
> Yes it was a hardware problem effectively, I added a protection chip
> which did not work properly and caused the pendrive not to be
> detected. I removed it and it works, so I will dig into the hardware
> problem.
> Thanks

we are a software project so awesome we can even remote debug hardware
problems :-)


>>
>>
>>
>>
>>> Second question; I see you added the mt76 wifi driver which is great!
>>> Thank you for your work. I see the module added on the board, how may
>>> I up the wifi? (I didn't find any readme on github [1])
>>
>> its a normal mac80211 based wifi so use the normal method. you will need
>> to add a eeprom offset to the dts file. either figure it out yourself
>> (look at how mt7620 based boards do it) or wait a few days till i had
>> time to update the lks7688 profile.
>>
> I let you do the edits and I will try as soon as you've done it.
> Thanks for your help

ok
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