cpufreq: Introduce macros for cpufreq_frequency_table iteration
Many cpufreq drivers need to iterate over the cpufreq_frequency_table
for various tasks.
This patch introduces two macros which can be used for iteration over
cpufreq_frequency_table keeping a common coding style across drivers:
- cpufreq_for_each_entry: iterate over each entry of the table
- cpufreq_for_each_valid_entry: iterate over each entry that contains
a valid frequency.
It should have no functional changes.
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 5ae5100..77a5fa1 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -468,6 +468,27 @@
* order */
};
+bool cpufreq_next_valid(struct cpufreq_frequency_table **pos);
+
+/*
+ * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table
+ * @pos: the cpufreq_frequency_table * to use as a loop cursor.
+ * @table: the cpufreq_frequency_table * to iterate over.
+ */
+
+#define cpufreq_for_each_entry(pos, table) \
+ for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
+
+/*
+ * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table
+ * excluding CPUFREQ_ENTRY_INVALID frequencies.
+ * @pos: the cpufreq_frequency_table * to use as a loop cursor.
+ * @table: the cpufreq_frequency_table * to iterate over.
+ */
+
+#define cpufreq_for_each_valid_entry(pos, table) \
+ for (pos = table; cpufreq_next_valid(&pos); pos++)
+
int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table);