[PATCH v2] i2c: cadence: Move to sensible power management

Shubhrajyoti Datta shubhrajyoti.datta at gmail.com
Sat Nov 21 05:30:07 PST 2015

On Thu, Oct 29, 2015 at 8:27 PM, Shubhrajyoti Datta
<shubhrajyoti.datta at gmail.com> wrote:
> On Wed, Oct 28, 2015 at 9:48 PM, Sören Brinkmann
> <soren.brinkmann at xilinx.com> wrote:
>> Hi Shubhrajyoti,
>> On Wed, 2015-10-28 at 12:56PM +0530, Shubhrajyoti Datta wrote:
>>> Currently the clocks are enabled at probe and disabled at remove.
>>> Which keeps the clocks enabled even if no transaction is going on.
>>> This patch enables the clocks at the start of transfer and disables
>>> after it.
>>> Also adapts to runtime pm.
>>> Remove xi2c->suspended and use pm runtime status instead.
>>> converts dev pm to const to silence a checkpatch warning.
>>> Signed-off-by: Shubhrajyoti Datta <shubhraj at xilinx.com>
>> To me, this looks all good. Just one small concern below.
> Thanks for the review.
Soren ,
Do are you ok with the change or do you want me to resend without the
suspended flag change.

>> There might have been a reason to store this flag here. Did you test
>> this with lockdep and CONFIG_DEBUG_ATOMIC_SLEEP? Just to make sure that
>> nothing that can sleep is called from atomic context.
> Done now.
> Essentially this is a flag is set in suspend routine. and checked in
> the isr I use
> pm_runtime_suspended(id->dev) instead.
>>         Sören
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