[U-Boot] [PATCH v3 8/9] tegra: i2c: Enable new CONFIG_SYS_I2C framework

[Heiko Schocher <hs@denx.de>]

Hello Stephen,

Am 02.08.2013 23:43, schrieb Stephen Warren:
> On 08/01/2013 10:40 PM, Heiko Schocher wrote:
>> Am 01.08.2013 22:32, schrieb Stephen Warren:
> ...
>>> Given how long this discussion is going on, can we please just revert
>>> the commit so that the code works for everyone who's trying to use it,
>>> then fix the problem later?
>>
>> Yes, but not reverting the hole commit, please just remove the
>> i2c_init_board() call in i2c_init_all() and test it, and send a
>> new patch, thanks!
>>
>> diff --git a/drivers/i2c/i2c_core.c b/drivers/i2c/i2c_core.c
>> index d1072e8..5f10eb3 100644
>> --- a/drivers/i2c/i2c_core.c
>> +++ b/drivers/i2c/i2c_core.c
>> @@ -246,7 +246,6 @@ void i2c_init_board(void)
>>    */
>>   void i2c_init_all(void)
>>   {
>> -       i2c_init_board();
>>          i2c_set_bus_num(CONFIG_SYS_SPD_BUS_NUM);
>>          return;
>>   }
>
> That change doesn't work. Instead of hanging immediately after printing
> "I2C:", it hangs after printing:
>
> I2C:   Caller requested bad clock: periph=-49, parent=2
>
> I guess now various data is simply uninitialized since DT parsing hasn't
> been run at all?

I do not know this ... and what happen if you make init_func_i2c()
weak and default just dummy?

> This is exactly why I suggest a full revert of the problematic patch. If
> we do that, it should immediately allow all Tegra boards to actually
> work again. Right now, nobody can use or test u-boot.git/master is

nobody = only tegra boards ... I am working fine with current mainline
on other arm targets ...

> completely blocked by this issue. This is dangerous, since it could
> easily allow all manner of other problems to appear in other areas
> without anyone being able to notice. It's my opinion we should
> immediately unblock them by a revert, and then later work out how to
> resolve the issues.
>
> For the record, "git revert 1f2ba722ac06393d6abe6d4734824d3b98ea9108"
> has one simple conflict in README, and certainly allows at least Beaver
> to work without issue.

Ah, you mean only the switch from the tegra i2c driver to the new
framework ... Hmm.. Ok, but I would prefer the way fixing the
current problem ... as I think, nobody want to do this work again ...

But it is alberts descicion on the end, and if nobody has currently
time for searching the real reason, the best way.

bye,
Heiko
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