Re: [RFC][PATCH v3 1/3] runtime interpreted power sequences
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2012-07-27 18:20:29
Also in:
linux-devicetree, linux-tegra, lkml
On Fri, Jul 27, 2012 at 09:05:48PM +0900, Alexandre Courbot wrote:
quoted hunk ↗ jump to hunk
+++ b/include/linux/power_seq.h@@ -0,0 +1,139 @@ +/* + * power_seq.h + * + * Simple interpreter for defining power sequences as platform data or device + * tree properties. Initially designed for use with backlight drivers. + * + * Power sequences are designed to replace the callbacks typically used in + * board-specific files that implement board-specific power sequences of devices + * such as backlights. A power sequence is an array of resources (which can a + * regulator, a GPIO, a PWM, ...) with an action to perform on it (enable or + * disable) and optional pre and post step delays. By having them interpreted + * instead of arbitrarily executed, it is possible to describe these in the + * device tree and thus remove board-specific code from the kernel. + * + * Author: Alexandre Courbot <acourbot@nvidia.com> + * + * Copyright (c) 2012 NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
As I always say: Unless you want to track the office movements of the FSF for the next 40 years, and keep this file up to date, drop that last paragraph, it's pointless.