Contributor meeting notes 19-Jan-21

Heiko Schocher hs at
Tue Jan 26 06:14:43 CET 2021

Hello Michel,

sorry for late reply...

Am 21.01.21 um 09:09 schrieb Michal Simek:
> On 1/21/21 5:11 AM, Simon Glass wrote:
>> Hi Michal,
>> On Wed, 20 Jan 2021 at 08:50, Michal Simek <michal.simek at> wrote:
>>> On 1/20/21 4:44 PM, Simon Glass wrote:
>>>> Hi Michal,
>>>> On Wed, 20 Jan 2021 at 00:46, Michal Simek <michal.simek at> wrote:
>>>>> Hi,
>>>>> On 1/19/21 7:54 PM, Simon Glass wrote:
>>>>>> Hi,
>>>>>> Thank you for attending!
>>>>>> Full notes at [1]
>>>>>> Tuesday 19 January 2021
>>>>>> Present: Daniel Schwierzeck, Heinrich Schuchardt, Michal Simek, Sean
>>>>>> Anderson, Simon Glass, Walter Lozano
>>>>>> Notes:
>>>>>> [all] Introductions
>>>>>> [all] Timing of call
>>>>>> - Current time is the best across US, Europe, India. But not any good
>>>>>> for East Asia
>>>>>> - Simon might send out survey
>>>>>> - Send invitation to maintainer group - DONE
>>>>>> [Simon] New sequence numbers
>>>>> I can't see any issue with it on zynqmp platform. There is only issue
>>>>> with i2c which was there for quite a long time that i2c mux is
>>>>> considered as chip on the subbus as is visible below.
>>>> Do you mean the naming of the device, or something else? What happens
>>>> if you type 'i2c bus'?
>>> If look at log below. mux is at address 74 which is i2c_mux_bus_drv
>>> and when you run i2c dev <any i2c mux channel> and run i2c probe i2c mux
>>> itself is assigned to to i2c_generic_chip_drv.
>>> Below you see it multiple times as generic_74 with ID 2/8/12/14/20. All
>>> of them are just targeting i2c mux.
>> That's strange. I wonder if it is failing to find it and creating
>> multiple copies?
>> +Heiko Schocher too
> I have never had a time to dig into this. But I expect that i2c mux
> enables one channel and i2c probe just correct detects all devices on
> bus before mux and also the whole subbus. But we are missing to check
> for every detected device if that address is listed already.

Me too, I have currently a heavy workload and no time to look into
this issue, but it is noted on my list... and my speculation goes
into the same direction.

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