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SubjectRe: [PATCH-v5 RESEND 2/5] i2c: pxa: enable/disable i2c module across msg xfer
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On Saturday 12 September 2015 12:23 AM, Wolfram Sang wrote:
> On Mon, Aug 24, 2015 at 11:29:35AM +0530, Vaibhav Hiremath wrote:
>> From: Yi Zhang <yizhang@marvell.com>
>>
>> Enable i2c module/unit before transmission and disable when it
>> finishes.
>>
>> why?
>> It's because the i2c bus may be disturbed if the slave device,
>> typically a touch, powers on.
>
> I am not convinced, "may disturb" is too weak for me. It would need a
> way more detailed description of the problem which makes clear that
> this mechanism is the only way to go forward.
>

Hmm, Ok.
Not sure what else I can bring up here.

> Can't you use Runtime PM for that?
>

I haven't tried it though, I can give a try and check.

Thanks,
Vaibhav



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