Contributor meeting notes 19-Jan-21

[Heiko Schocher]

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 xilinx.com> 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 xilinx.com> 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.

bye,
Heiko
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