From: kmpark@infradead.org (Kyungmin Park)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] gpio: add pin biasing and drive mode to gpiolib
Date: Wed, 20 Apr 2011 21:38:59 +0900 [thread overview]
Message-ID: <BANLkTim7pGJVEngS7jJHgcn1FTMEiUC83w@mail.gmail.com> (raw)
In-Reply-To: <BANLkTimfkpjQ9DoYKRTVwyvtPRccO+RwpA@mail.gmail.com>
On Wed, Apr 20, 2011 at 9:32 PM, Linus Walleij <linus.walleij@linaro.org> wrote:
> 2011/4/19 Kyungmin Park <kmpark@infradead.org>:
>
>> One more consideration, not mentioned previous time, is that pin
>> configuration for power down mode.
>> Samsung SoCs has retention GPIO configurations at sleep (suspend)
>> mode. and restore it at resume time.
>> it's need to reduce power and proper operation after suspend.
>
> Isn't this supposed to be handled by runtime_pm hooks inside
> your GPIO driver rather than by someone else talking to
> the GPIO driver trying to spool/unspool the state from the
> outside in some other place?
It's different from normal gpio input/output pin. It has different
offset and configuration.
As I know, current gpiolib doesn't support it.
Of course these should be handled at board file instead of drivers.
Thank you,
Kyungmin Park
>
> Or am I getting things backwards now...?
>
> Yours,
> Linus Walleij
>
next prev parent reply other threads:[~2011-04-20 12:38 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-17 21:37 [PATCH 1/2] gpio: add pin biasing and drive mode to gpiolib Linus Walleij
2011-04-17 21:48 ` Alan Cox
2011-04-17 21:58 ` Linus Walleij
2011-04-17 22:03 ` Alan Cox
2011-04-18 0:09 ` Kyungmin Park
2011-04-18 7:17 ` Kurt Van Dijck
2011-04-18 8:04 ` Ben Nizette
2011-04-18 8:19 ` Alan Cox
2011-04-18 8:50 ` Ben Nizette
2011-04-18 11:59 ` Mark Brown
2011-04-18 22:16 ` Ben Nizette
2011-04-18 22:31 ` Mark Brown
2011-04-19 4:50 ` Ben Nizette
2011-04-20 12:11 ` Linus Walleij
2011-04-18 12:26 ` Alan Cox
2011-04-18 22:26 ` Ben Nizette
2011-04-19 8:38 ` Alan Cox
2011-04-19 8:51 ` Kyungmin Park
2011-04-20 12:32 ` Linus Walleij
2011-04-20 12:38 ` Kyungmin Park [this message]
2011-04-20 14:54 ` Alan Cox
2011-04-20 14:26 ` Haojian Zhuang
2011-04-20 14:40 ` Kyungmin Park
2011-04-20 15:04 ` Haojian Zhuang
2011-04-20 15:17 ` Linus Walleij
2011-04-20 15:32 ` Alan Cox
2011-04-20 15:45 ` Linus Walleij
2011-04-27 21:55 ` Russell King - ARM Linux
2011-04-27 22:16 ` H Hartley Sweeten
2011-04-20 15:13 ` Linus Walleij
2011-04-20 15:29 ` Alan Cox
2011-04-20 15:39 ` Linus Walleij
2011-04-20 15:43 ` Alan Cox
2011-04-27 21:58 ` Russell King - ARM Linux
2011-04-20 0:09 ` Ben Nizette
2011-04-20 9:45 ` Alan Cox
2011-04-20 12:38 ` Linus Walleij
2011-04-20 14:55 ` Alan Cox
2011-04-20 12:21 ` Linus Walleij
2011-04-20 23:32 ` Ben Nizette
2011-04-21 6:48 ` Linus Walleij
2011-04-23 8:25 ` Ben Nizette
2011-04-21 0:29 ` Ben Nizette
2011-04-20 12:19 ` Linus Walleij
2011-04-20 12:22 ` Alan Cox
2011-04-20 12:04 ` Linus Walleij
2011-04-20 23:24 ` Ben Nizette
2011-04-21 15:39 ` Stijn Devriendt
2011-04-22 11:36 ` Linus Walleij
2011-04-22 11:56 ` Alan Cox
2011-04-23 8:35 ` Ben Nizette
2011-04-25 18:52 ` Rohit Vaswani
2011-04-26 7:48 ` Linus Walleij
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