[PATCH V2] PM: OPP: introduce function to free cpufreq table

Nishanth Menon
2011-05-25T07:43:32Z

cpufreq table allocated by opp_init_cpufreq_table is better
freed by OPP layer itself. This allows future modifications to
the table handling to be transparent to the users.

Signed-off-by: Nishanth Menon <nm@ti.com>
---
V2: removed lock of free.
V1: http://marc.info/?t=130619241700001&r=1&w=2

Example discussion: http://marc.info/?t=130570440600005&r=1&w=2
Documentation/power/opp.txt | 2 ++
drivers/base/power/opp.c | 17 +++++++++++++++++
include/linux/opp.h | 8 ++++++++
3 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/Documentation/power/opp.txt b/Documentation/power/opp.txt
index 5ae70a1..3035d00 100644
--- a/Documentation/power/opp.txt
+++ b/Documentation/power/opp.txt
@@ -321,6 +321,8 @@ opp_init_cpufreq_table - cpufreq framework typically is initialized with
addition to CONFIG_PM as power management feature is required to
dynamically scale voltage and frequency in a system.

+opp_free_cpufreq_table - Free up the table allocated by opp_init_cpufreq_table
+
7. Data Structures
==================
Typically an SoC contains multiple voltage domains which are variable. Each
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c
index 56a6899..5cc1232 100644
--- a/drivers/base/power/opp.c
+++ b/drivers/base/power/opp.c
@@ -625,4 +625,21 @@ int opp_init_cpufreq_table(struct device *dev,

return 0;
}
+
+/**
+ * opp_free_cpufreq_table() - free the cpufreq table
+ * @dev: device for which we do this operation
+ * @table: table to free
+ *
+ * Free up the table allocated by opp_init_cpufreq_table
+ */
+void opp_free_cpufreq_table(struct device *dev,
+ struct cpufreq_frequency_table **table)
+{
+ if (!table)
+ return;
+
+ kfree(*table);
+ *table = NULL;
+}
#endif /* CONFIG_CPU_FREQ */
diff --git a/include/linux/opp.h b/include/linux/opp.h
index 5449945..7020e97 100644
--- a/include/linux/opp.h
+++ b/include/linux/opp.h
@@ -94,12 +94,20 @@ static inline int opp_disable(struct device *dev, unsigned long freq)
#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
int opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table);
+void opp_free_cpufreq_table(struct device *dev,
+ struct cpufreq_frequency_table **table);
#else
static inline int opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
return -EINVAL;
}
+
+static inline
+void opp_free_cpufreq_table(struct device *dev,
+ struct cpufreq_frequency_table **table)
+{
+}
#endif /* CONFIG_CPU_FREQ */

#endif /* __LINUX_OPP_H__ */
--
1.7.1