Re: [PATCH v5 08/36] i2c: tegra: Use reset_control_reset()

[Dmitry Osipenko]

07.09.2020 11:13, Andy Shevchenko пишет:
> On Sun, Sep 6, 2020 at 9:51 PM Dmitry Osipenko <digetx@xxxxxxxxx> wrote:
>>
>> Use a single reset_control_reset() instead of assert/deasset couple in
>> order to make code cleaner a tad. Note that the reset_control_reset()
>> uses 1 microsecond delay instead of 2 that was used previously, but this
>> shouldn't matter. In addition don't ignore potential error of the reset
>> control by emitting a noisy warning if it fails, which shouldn't ever
>> happen in practice.
> 
> Still it's not clear if you check the datasheet or not. Some
> elaboration would be good to have.

I'll update the commit message with more details. Thanks!

> ...
> 
>> +       WARN_ON_ONCE(err);
> 
> Why screaming here? Wouldn't be dev_warn() enough?

The error condition is an indicator of a severe problem because the
reset shouldn't ever fail in practice, hence screaming is a preferred
behavour. I'll a add a comment to the code, telling this.