From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Alexandre Courbot <acourbot@nvidia.com>
Cc: Stephen Warren <swarren@nvidia.com>,
Thierry Reding <thierry.reding@avionic-design.de>,
Simon Glass <sjg@chromium.org>,
Grant Likely <grant.likely@secretlab.ca>,
Rob Herring <rob.herring@calxeda.com>,
Mark Brown <broonie@opensource.wolfsonmicro.com>,
Arnd Bergmann <arnd@arndb.de>,
linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fbdev@vger.kernel.org, devicetree-discuss@lists.ozlabs.org
Subject: Re: [RFC][PATCH v3 1/3] runtime interpreted power sequences
Date: Fri, 27 Jul 2012 11:19:23 -0700 [thread overview]
Message-ID: <20120727181923.GB23564@kroah.com> (raw)
In-Reply-To: <1343390750-3642-2-git-send-email-acourbot@nvidia.com>
On Fri, Jul 27, 2012 at 09:05:48PM +0900, Alexandre Courbot wrote:
> Some device drivers (panel backlights especially) need to follow precise
> sequences for powering on and off, involving gpios, regulators, PWMs
> with a precise powering order and delays to respect between each steps.
> These sequences are board-specific, and do not belong to a particular
> driver - therefore they have been performed by board-specific hook
> functions to far.
>
> With the advent of the device tree and of ARM kernels that are not
> board-tied, we cannot rely on these board-specific hooks anymore but
> need a way to implement these sequences in a portable manner. This patch
> introduces a simple interpreter that can execute such power sequences
> encoded either as platform data or within the device tree.
>
> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
> ---
> Documentation/power/power_seq.txt | 120 +++++++++++++++
> drivers/base/Kconfig | 4 +
> drivers/base/Makefile | 1 +
> drivers/base/power_seq.c | 300 ++++++++++++++++++++++++++++++++++++++
> include/linux/power_seq.h | 139 ++++++++++++++++++
What's wrong with drivers/power/? I sure don't want to maintain this
code, and it seems to not be part of the "driver core" infrastructure.
thanks,
greg k-h
next prev parent reply other threads:[~2012-07-27 18:19 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-27 12:05 [RFC][PATCH v3 0/3] Power sequences with PWM and DT support Alexandre Courbot
2012-07-27 12:05 ` [RFC][PATCH v3 1/3] runtime interpreted power sequences Alexandre Courbot
2012-07-27 18:19 ` Greg Kroah-Hartman [this message]
2012-07-30 1:51 ` Alex Courbot
2012-07-30 2:40 ` Gethering power management/policy hw drivers under drivers/power/? (Re: [RFC][PATCH v3 1/3] runtime interpreted power sequences) Anton Vorontsov
2012-07-30 20:59 ` Rafael J. Wysocki
2012-08-01 0:51 ` Anton Vorontsov
2012-08-06 8:45 ` Pihet-XID, Jean
2012-07-27 18:20 ` [RFC][PATCH v3 1/3] runtime interpreted power sequences Greg Kroah-Hartman
2012-07-30 11:00 ` Simon Glass
2012-07-31 8:37 ` Alex Courbot
2012-07-31 9:13 ` Thierry Reding
2012-07-31 10:11 ` Alex Courbot
2012-07-31 10:46 ` Thierry Reding
2012-07-31 14:23 ` Mark Brown
2012-07-30 11:33 ` Thierry Reding
2012-07-31 9:51 ` Alex Courbot
2012-07-31 10:19 ` Thierry Reding
2012-08-01 2:50 ` Alex Courbot
2012-08-01 7:17 ` Thierry Reding
2012-07-31 14:11 ` Mark Brown
2012-07-30 15:44 ` Rob Herring
2012-07-30 15:47 ` Mark Brown
2012-07-31 9:16 ` Thierry Reding
2012-07-30 22:26 ` Stephen Warren
2012-07-31 10:15 ` Alex Courbot
2012-07-30 22:45 ` Stephen Warren
2012-07-31 10:32 ` Alex Courbot
2012-07-31 10:56 ` Thierry Reding
2012-07-31 12:22 ` Mitch Bradley
2012-07-31 12:38 ` Thierry Reding
2012-07-31 12:55 ` Mitch Bradley
2012-08-01 1:47 ` Alex Courbot
2012-08-01 2:15 ` Mitch Bradley
2012-08-01 1:42 ` Alex Courbot
2012-07-31 14:13 ` Mark Brown
2012-07-31 14:22 ` Thierry Reding
2012-07-31 14:26 ` Mark Brown
2012-07-31 14:32 ` Thierry Reding
2012-07-31 15:39 ` Mark Brown
2012-07-31 16:19 ` Greg Kroah-Hartman
2012-07-31 16:22 ` Mark Brown
2012-07-31 16:42 ` Greg Kroah-Hartman
2012-07-31 16:50 ` Mark Brown
2012-08-01 7:41 ` Thierry Reding
2012-08-01 13:26 ` Mark Brown
2012-08-01 13:38 ` Thierry Reding
2012-08-01 13:55 ` Mark Brown
2012-08-01 14:01 ` Thierry Reding
2012-07-31 16:34 ` Stephen Warren
2012-08-02 8:00 ` Alex Courbot
2012-08-02 8:21 ` Thierry Reding
2012-08-02 8:27 ` Alex Courbot
2012-08-02 8:45 ` Thierry Reding
2012-08-02 9:20 ` Alex Courbot
2012-08-02 18:11 ` Mark Brown
2012-08-03 1:15 ` Alex Courbot
2012-08-04 14:12 ` Mark Brown
2012-08-06 2:27 ` Alex Courbot
2012-08-06 16:16 ` Stephen Warren
2012-08-07 5:10 ` Alex Courbot
2012-07-27 12:05 ` [RFC][PATCH v3 2/3] pwm_backlight: use " Alexandre Courbot
2012-07-27 12:05 ` [RFC][PATCH v3 3/3] tegra: add pwm backlight device tree nodes Alexandre Courbot
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