linux-kernel - Re: [PATCH 0/7] gpio: omap: fixes and improvements

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Date:	Tue, 25 Aug 2015 14:41:01 +0300
From:	Grygorii Strashko <grygorii.strashko@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>, <ssantosh@...nel.org>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Javier Martinez Canillas <javier@...hile0.org>,
	<linux-omap@...r.kernel.org>, <linux-gpio@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/7] gpio: omap: fixes and improvements

On 08/21/2015 11:13 AM, Tony Lindgren wrote:
> * Tony Lindgren <tony@...mide.com> [150818 23:42]:
>> Hi,
>>
>> * Grygorii Strashko <grygorii.strashko@...com> [150818 04:14]:
>>> Hi,
>>>
>>> This patch series contains set of trivial fixes and improvements, and also
>>> patches which fixes wrong APIs usage in atomic context as for -RT as for
>>> non-RT kernel. The final goal of this series is to make TI OMAP GPIO
>>> driver compatible with -RT kernel as much as possible.
>>>
>>> Patch 1-4: trivial fixes and improvements
>>> Patch 5: fixes wrong CLK clk_prepare/unprepare APIs usage in atomic contexet
>>> Patch 6(rfc): required to be compatible with -RT kernel, because PM runtime
>>>   can't be used in atimic context on -RT.
>>> Patch 7(rfc): This patch converts TI OMAP GPIO driver to use generic irq
>>>   handler instead of chained IRQ handler. This way OMAP GPIO driver will be
>>>   compatible with RT kernel where it will be forced thread IRQ handler
>>>   while in non-RT kernel it still will be executed in HW IRQ context.
>>
>> Based on quick testing this series breaks at least core off idle for omap3.
>> You probably should add a beagle xm to your test devices so you can
>> properly test PM features.
> 
> Sorry I take that back, after trying to figure out which patch breaks PM
> I noticed I had some other patches applied also. Looks like PM works just
> fine with this series for me, so please feel free to add:
> 

Uh... :) Thanks Tony a lot and sorry for delayed reply (was ooo).
You've restored my heartbeat :)

> Tested-by: Tony Lindgren <tony@...mide.com>
> 
> Note that I have not been able to test this with gpio button as my
> boards are in a rack. You may want to do some gpio button tests to
> make sure things wake up properly from off idle if you can get hold
> of a beagle xm. I posted some instructions how to test earlier today
> for Kishon in the "[PATCH v2 00/16] omap_hsmmc: regulator usage
> cleanup and fixes" thread.


I've tested it actually using GPIO buttons and UART console wake-up
(Results - https://lkml.org/lkml/2015/8/14/194 :)

And I'd try to retest it on beagle xm also, but not sure if i'd be able
to test button's wake-up - have shared access only now to beagle xm
which is rack also.

-- 
regards,
-grygorii
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