Most of the CPUFreq drivers do similar things in .exit() and .verify() routines and .attr. So its better if we have generic routines for them which can be used by cpufreq drivers then.
This patch introduces generic .attr, .exit() and .verify() cpufreq drivers.
Cc: Andrew Lunn andrew@lunn.ch Cc: David S. Miller davem@davemloft.net Cc: Dmitry Eremin-Solenikov dbaryshkov@gmail.com Cc: Eric Miao eric.y.miao@gmail.com Cc: Guan Xuetao gxt@mprc.pku.edu.cn Cc: Hans-Christian Egtvedt egtvedt@samfundet.no Cc: Jesper Nilsson jesper.nilsson@axis.com Cc: John Crispin blogic@openwrt.org Cc: Kukjin Kim kgene.kim@samsung.com Cc: Linus Walleij linus.walleij@linaro.org Cc: linux-cris-kernel@axis.com Cc: linux-sh@vger.kernel.org Cc: Mikael Starvik starvik@axis.com Cc: Paul Mundt lethal@linux-sh.org Cc: Santosh Shilimkar santosh.shilimkar@ti.com Cc: Sekhar Nori nsekhar@ti.com Cc: Shawn Guo shawn.guo@linaro.org Cc: sparclinux@vger.kernel.org Cc: spear-devel@list.st.com Cc: Stephen Warren swarren@nvidia.com Cc: Steven Miao realmz6@gmail.com Cc: Tony Luck tony.luck@intel.com Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- drivers/cpufreq/freq_table.c | 20 ++++++++++++++++++++ include/linux/cpufreq.h | 8 ++++++++ 2 files changed, 28 insertions(+)
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c index 11f6fa9..b198458 100644 --- a/drivers/cpufreq/freq_table.c +++ b/drivers/cpufreq/freq_table.c @@ -87,6 +87,20 @@ int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, } EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
+/* + * Generic routine to verify policy & frequency table, requires driver to call + * cpufreq_frequency_table_get_attr() prior to it. + */ +int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy) +{ + struct cpufreq_frequency_table *table = + cpufreq_frequency_get_table(policy->cpu); + if (!table) + return -ENODEV; + + return cpufreq_frequency_table_verify(policy, table); +} +EXPORT_SYMBOL_GPL(cpufreq_generic_frequency_table_verify);
int cpufreq_frequency_table_target(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table, @@ -200,6 +214,12 @@ struct freq_attr cpufreq_freq_attr_scaling_available_freqs = { }; EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);
+struct freq_attr *cpufreq_generic_attr[] = { + &cpufreq_freq_attr_scaling_available_freqs, + NULL, +}; +EXPORT_SYMBOL_GPL(cpufreq_generic_attr); + /* * if you use these, you must assure that the frequency table is valid * all the time between get_attr and put_attr! diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index c0297a6..4907eb2 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -393,6 +393,7 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table); +int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy);
int cpufreq_frequency_table_target(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table, @@ -408,10 +409,17 @@ struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
/* the following are really really optional */ extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; +extern struct freq_attr *cpufreq_generic_attr[]; void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table, unsigned int cpu); void cpufreq_frequency_table_put_attr(unsigned int cpu); int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, struct cpufreq_frequency_table *table);
+static inline int cpufreq_generic_exit(struct cpufreq_policy *policy) +{ + cpufreq_frequency_table_put_attr(policy->cpu); + return 0; +} + #endif /* _LINUX_CPUFREQ_H */