From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754417AbZJVDpq (ORCPT ); Wed, 21 Oct 2009 23:45:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754319AbZJVDpo (ORCPT ); Wed, 21 Oct 2009 23:45:44 -0400 Received: from g6t0185.atlanta.hp.com ([15.193.32.62]:17098 "EHLO g6t0185.atlanta.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754309AbZJVDpm (ORCPT ); Wed, 21 Oct 2009 23:45:42 -0400 Subject: [PATCH 7/7] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/ To: randy.dunlap@oracle.com, greg@kroah.com From: Alex Chiang Cc: Dave Jones , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, rientjes@google.com Date: Wed, 21 Oct 2009 21:45:46 -0600 Message-ID: <20091022034546.13399.21222.stgit@bob.kio> In-Reply-To: <20091022033506.13399.90799.stgit@bob.kio> References: <20091022033506.13399.90799.stgit@bob.kio> User-Agent: StGit/0.14.3.386.gb02d MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a complex interface and is already described in Documentation/cpu-freq/, especially in the user-guide.txt file. No need to copy/paste all that information. Let's just alert the reader to the presence of the user-guide. Cc: Dave Jones Signed-off-by: Alex Chiang --- Documentation/ABI/testing/sysfs-devices-system-cpu | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 968d8ba..81e61f5 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -121,6 +121,24 @@ Description: Discover cpuidle policy and mechanism See files in Documentation/cpuidle/ for more information. +What: /sys/devices/system/cpu/cpu#/cpufreq/* +Date: pre-git history +Contact: cpufreq@vger.kernel.org +Description: Discover and change clock speed of CPUs + + Clock scaling allows you to change the clock speed of the + CPUs on the fly. This is a nice method to save battery + power, because the lower the clock speed, the less power + the CPU consumes. + + There are many knobs to tweak in this directory. + + See files in Documentation/cpu-freq/ for more information. + + In particular, read Documentation/cpu-freq/user-guide.txt + to learn how to control the knobs. + + What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X Date: August 2008 KernelVersion: 2.6.27