diff mbox series

[v2,20/24] docs: cpu-freq: convert pcc-cpufreq.txt to ReST

Message ID 63ed3462eb3083290d9bc41332ab45524a71b3d9.1581956285.git.mchehab+huawei@kernel.org
State New
Headers show
Series None | expand

Commit Message

Mauro Carvalho Chehab Feb. 17, 2020, 4:20 p.m. UTC 
- Add a SPDX header;
- Add a document title, based on the original contents of
  cpu-freq/index.txt;
- Add copyright symbol;
- Remove a c-like comment, adding the useful info not covered
  by the SPDX and document title headers as text;
- Comment out the existing text-only index;
- Mark literal blocks as such;
- Some whitespace fixes and new line breaks;
- Add it to cpu-freq/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 Documentation/cpu-freq/index.rst              |  1 +
 .../{pcc-cpufreq.txt => pcc-cpufreq.rst}      | 86 ++++++++-----------
 2 files changed, 38 insertions(+), 49 deletions(-)
 rename Documentation/cpu-freq/{pcc-cpufreq.txt => pcc-cpufreq.rst} (80%)
diff mbox series

Patch

diff --git a/Documentation/cpu-freq/index.rst b/Documentation/cpu-freq/index.rst
index d12ef0bb78a5..fb2db2eb7eaf 100644
--- a/Documentation/cpu-freq/index.rst
+++ b/Documentation/cpu-freq/index.rst
@@ -19,6 +19,7 @@  Author: Dominik Brodowski  <linux@brodo.de>
    cpu-drivers
    cpufreq-nforce2
    cpufreq-stats
+   pcc-cpufreq
 
 Mailing List
 ------------
diff --git a/Documentation/cpu-freq/pcc-cpufreq.txt b/Documentation/cpu-freq/pcc-cpufreq.rst
similarity index 80%
rename from Documentation/cpu-freq/pcc-cpufreq.txt
rename to Documentation/cpu-freq/pcc-cpufreq.rst
index 9e3c3b33514c..6fd891f757a7 100644
--- a/Documentation/cpu-freq/pcc-cpufreq.txt
+++ b/Documentation/cpu-freq/pcc-cpufreq.rst
@@ -1,45 +1,29 @@ 
-/*
- *  pcc-cpufreq.txt - PCC interface documentation
- *
- *  Copyright (C) 2009 Red Hat, Matthew Garrett <mjg@redhat.com>
- *  Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
- *      Nagananda Chumbalkar <nagananda.chumbalkar@hp.com>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- *  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, GOOD TITLE or NON
- *  INFRINGEMENT. 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.,
- *  675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
+.. SPDX-License-Identifier: GPL-2.0
+.. include:: <isonum.txt>
 
+=========================================================
+Processor Clocking Control (PCC) CPUFreq Driver Specifics
+=========================================================
 
-			Processor Clocking Control Driver
-			---------------------------------
+Copyright |copy| 2009 Red Hat, Matthew Garrett <mjg@redhat.com>
 
-Contents:
----------
-1.	Introduction
-1.1	PCC interface
-1.1.1   Get Average Frequency
-1.1.2	Set Desired Frequency
-1.2	Platforms affected
-2.	Driver and /sys details
-2.1	scaling_available_frequencies
-2.2	cpuinfo_transition_latency
-2.3	cpuinfo_cur_freq
-2.4	related_cpus
-3.	Caveats
+Copyright |copy| 2009 Hewlett-Packard Development Company, L.P.,
+Nagananda Chumbalkar <nagananda.chumbalkar@hp.com>
+
+
+.. Contents:
+
+   1.	Introduction
+   1.1	PCC interface
+   1.1.1   Get Average Frequency
+   1.1.2	Set Desired Frequency
+   1.2	Platforms affected
+   2.	Driver and /sys details
+   2.1	scaling_available_frequencies
+   2.2	cpuinfo_transition_latency
+   2.3	cpuinfo_cur_freq
+   2.4	related_cpus
+   3.	Caveats
 
 1. Introduction:
 ----------------
@@ -140,7 +124,9 @@  Internally, there is no need for the driver to convert the "target" frequency
 to a corresponding P-state.
 
 The VERSION number for the driver will be of the format v.xy.ab.
-eg: 1.00.02
+eg::
+
+   1.00.02
    ----- --
     |    |
     |    -- this will increase with bug fixes/enhancements to the driver
@@ -168,21 +154,21 @@  A) Often cpuinfo_cur_freq will show a value different than what is declared
 in the scaling_available_frequencies or scaling_cur_freq, or scaling_max_freq.
 This is due to "turbo boost" available on recent Intel processors. If certain
 conditions are met the BIOS can achieve a slightly higher speed than requested
-by OSPM. An example:
+by OSPM. An example::
 
-scaling_cur_freq	: 2933000
-cpuinfo_cur_freq	: 3196000
+	scaling_cur_freq	: 2933000
+	cpuinfo_cur_freq	: 3196000
 
 B) There is a round-off error associated with the cpuinfo_cur_freq value.
 Since the driver obtains the current frequency as a "percentage" (%) of the
 nominal frequency from the BIOS, sometimes, the values displayed by
-scaling_cur_freq and cpuinfo_cur_freq may not match. An example:
+scaling_cur_freq and cpuinfo_cur_freq may not match. An example::
 
-scaling_cur_freq	: 1600000
-cpuinfo_cur_freq	: 1583000
+	scaling_cur_freq	: 1600000
+	cpuinfo_cur_freq	: 1583000
 
 In this example, the nominal frequency is 2933 MHz. The driver obtains the
-current frequency, cpuinfo_cur_freq, as 54% of the nominal frequency:
+current frequency, cpuinfo_cur_freq, as 54% of the nominal frequency::
 
 	54% of 2933 MHz = 1583 MHz
 
@@ -193,8 +179,10 @@  corresponds to the frequency of the P0 P-state.
 -----------------
 The related_cpus field is identical to affected_cpus.
 
-affected_cpus	: 4
-related_cpus	: 4
+::
+
+	affected_cpus	: 4
+	related_cpus	: 4
 
 Currently, the PCC driver does not evaluate _PSD. The platforms that support
 PCC do not implement SW_ALL. So OSPM doesn't need to perform any coordination