path: root/Documentation/cpu-freq
diff options
authorViresh Kumar <>2013-03-30 16:25:15 +0530
committerRafael J. Wysocki <>2013-06-04 14:25:59 +0200
commit5070158804b5339c71809f5e673cea1cfacd804d (patch)
tree42256e81e326af4e568a179787e66d434a0b1ffc /Documentation/cpu-freq
parent2361be23666232dbb4851a527f466c4cbf5340fc (diff)
cpufreq: rename index as driver_data in cpufreq_frequency_table
The "index" field of struct cpufreq_frequency_table was never an index and isn't used at all by the cpufreq core. It only is useful for cpufreq drivers for their internal purposes. Many people nowadays blindly set it in ascending order with the assumption that the core will use it, which is a mistake. Rename it to "driver_data" as that's what its purpose is. All of its users are updated accordingly. [rjw: Changelog] Signed-off-by: Viresh Kumar <> Acked-by: Simon Horman <> Signed-off-by: Rafael J. Wysocki <>
Diffstat (limited to 'Documentation/cpu-freq')
1 files changed, 2 insertions, 8 deletions
diff --git a/Documentation/cpu-freq/cpu-drivers.txt b/Documentation/cpu-freq/cpu-drivers.txt
index a3585eac83b6..19fa98e07bf7 100644
--- a/Documentation/cpu-freq/cpu-drivers.txt
+++ b/Documentation/cpu-freq/cpu-drivers.txt
@@ -186,7 +186,7 @@ As most cpufreq processors only allow for being set to a few specific
frequencies, a "frequency table" with some functions might assist in
some work of the processor driver. Such a "frequency table" consists
of an array of struct cpufreq_frequency_table entries, with any value in
-"index" you want to use, and the corresponding frequency in
+"driver_data" you want to use, and the corresponding frequency in
"frequency". At the end of the table, you need to add a
cpufreq_frequency_table entry with frequency set to CPUFREQ_TABLE_END. And
if you want to skip one entry in the table, set the frequency to
@@ -214,10 +214,4 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
is the corresponding frequency table helper for the ->target
stage. Just pass the values to this function, and the unsigned int
index returns the number of the frequency table entry which contains
-the frequency the CPU shall be set to. PLEASE NOTE: This is not the
-"index" which is in this cpufreq_table_entry.index, but instead
-cpufreq_table[index]. So, the new frequency is
-cpufreq_table[index].frequency, and the value you stored into the
-frequency table "index" field is
+the frequency the CPU shall be set to.