Re: About one i2c failure issue after system reset

[Rajeev kumar <rajeev-dlh.kumar-qxv4g6HH51o@public.gmane.org>]

Hello Jason

On 11/21/2011 1:05 PM, Jason Hui wrote:
> Hi, Ben, Jean,
>
> I have one issue about the i2c failure: there will be on-going i2c
> transfer while system get reset.
> At the time when the reset happens, the slave may pull the SDA to
> LOW.After reset, the i2c master may reset, but
> the slave may still pull the SDA to LOW since there is no reset pin
> for the slave device to do i2c reset, thus
> result in the further i2c access failure forever unless we completely
> power off the system by pulling out
> the battery.
>
This is not the only solution for this. Master can accomplishes error 
recovery by clocking Clock until Data is high and then issuing a Start 
followed by a Stop.

Best Regards
Rajeev
...

> I know we have the shutdown member function, but as I know there is
> very less i2c master has implemented this
> function correctly. I think we need take seriously about this issue,
> do you have any comments? Thanks,
>
>
> Jason Liu
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