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

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Message-ID: <CACRpkdZhbadd5d4P+2B0_DktqK4CHzZPVJC8kPHZYUnp8TaxsA@mail.gmail.com>
Date:	Fri, 11 Oct 2013 17:56:58 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Tony Lindgren <tony@...mide.com>
Cc:	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>,
	Prakash Manjunathappa <prakash.pm@...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 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.

Yours,
Linus Walleij
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