linux-kernel - Re: [PATCH 4/6] pinctrl: single: Add support for wake-up interrupts

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Message-ID: <5260E606.2030903@ti.com>
Date:	Fri, 18 Oct 2013 13:10:54 +0530
From:	Balaji T K <balajitk@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Roger Quadros <rogerq@...com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	Haojian Zhuang <haojian.zhuang@...aro.org>,
	Benoît Cousson 
	<bcousson@...libre.com>, Linux-OMAP <linux-omap@...r.kernel.org>
Subject: Re: [PATCH 4/6] pinctrl: single: Add support for wake-up interrupts

On Friday 11 October 2013 09:31 PM, Tony Lindgren wrote:
> * Linus Walleij <linus.walleij@...aro.org> [131011 09:05]:
>> On Fri, Oct 11, 2013 at 5:43 PM, Tony Lindgren <tony@...mide.com> wrote:
>>> * Linus Walleij <linus.walleij@...aro.org> [131011 03:40]:
>>>> On Fri, Oct 11, 2013 at 10:56 AM, Roger Quadros <rogerq@...com> wrote:
>>>>
>>>>> The register handling is fine. But how do we deal with resource handling?
>>>>> e.g. the block that has the deep-core registers might need to be clocked or powered
>>>>> before the registers can be accessed.
>>>>
>>>> Yeah I saw this in the code there.
>>>>
>>>> In this case it seems syscon-type regmap access can be used to
>>>> read/write the registers, so maybe the pin controller also need to
>>>>   get a handle on some clock etc?
>>>
>>> Uhh, let's not go there.. The resource availability needs to be
>>> handled transparently in regmap code and the reg provider hardware
>>> module driver using runtime PM.
>>
>> OK we can surely discuss this with broonie, it makes sense to
>> have regmap be able to do its deed transparently.
>
> Yes I think so too. Sounds like we need callbacks for the runtime PM
> checks to the "register provider" driver. Hwo knows, maybe those
> features are there already :)
>

Hi Tony,

Any conclusion on using regmap for omap control module non-mux registers ?

Thanks and Regards,
Balaji T K
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