Re: [PATCH v4 1/1] i2c: algo-pca: Reapply i2c bus settings after reset

[Wolfram Sang]

On Wed, Sep 09, 2020 at 08:39:50PM +0000, Chris Packham wrote:
> 
> On 9/09/20 8:23 pm, Wolfram Sang wrote:
> > On Wed, Sep 09, 2020 at 08:32:47AM +1200, Evan Nimmo wrote:
> >> If something goes wrong (such as the SCL being stuck low) then we need
> >> to reset the PCA chip. The issue with this is that on reset we lose all
> >> config settings and the chip ends up in a disabled state which results
> >> in a lock up/high CPU usage. We need to re-apply any configuration that
> >> had previously been set and re-enable the chip.
> >>
> >> Signed-off-by: Evan Nimmo <evan.nimmo@xxxxxxxxxxxxxxxxxxx>
> >> Reviewed-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
> >> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> >> Reviewed-by: Wolfram Sang <wsa@xxxxxxxxxx>
> > Applied to for-current, thanks!
> >
> > For the record, were you able to test both, PCA9564 and PCA9665?
> >
> Our hardware platforms only have PCA9665 so that's all we can test.

Okay, good to know. BTW, just after I sent out my pull request
containing this patch, I noticed there is no Fixes: tag. So, if you want
this patch to be backported, please send it to stable@ once my
pull-request is in Linus' tree.

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