3 files changed, 35 insertions, 0 deletions

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 534fcb825153..2d06754f4a04 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -2,6 +2,7 @@ menu "CPU Frequency scaling"
 
 config CPU_FREQ
         bool "CPU Frequency scaling"
+        select CPU_FREQ_TABLE
         help
           CPU Frequency scaling allows you to change the clock speed of 
           CPUs on the fly. This is a nice method to save power, because 
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index f033adf06eaf..985f325adc4f 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -181,6 +181,37 @@ u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
 }
 EXPORT_SYMBOL_GPL(get_cpu_idle_time);
 
+/*
+ * This is a generic cpufreq init() routine which can be used by cpufreq
+ * drivers of SMP systems. It will do following:
+ * - validate & show freq table passed
+ * - set policies transition latency
+ * - policy->cpus with all possible CPUs
+ */
+int cpufreq_generic_init(struct cpufreq_policy *policy,
+                struct cpufreq_frequency_table *table,
+                unsigned int transition_latency)
+{
+        int ret;
+
+        ret = cpufreq_table_validate_and_show(policy, table);
+        if (ret) {
+                pr_err("%s: invalid frequency table: %d\n", __func__, ret);
+                return ret;
+        }
+
+        policy->cpuinfo.transition_latency = transition_latency;
+
+        /*
+         * The driver only supports the SMP configuartion where all processors
+         * share the clock and voltage and clock.
+         */
+        cpumask_setall(policy->cpus);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_generic_init);
+
 struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
 {
         struct cpufreq_policy *policy = NULL;
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 36ccd0bf1304..0aba2a6cadaf 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -424,6 +424,9 @@ void cpufreq_frequency_table_put_attr(unsigned int cpu);
 int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
                                       struct cpufreq_frequency_table *table);
 
+int cpufreq_generic_init(struct cpufreq_policy *policy,
+                struct cpufreq_frequency_table *table,
+                unsigned int transition_latency);
 static inline int cpufreq_generic_exit(struct cpufreq_policy *policy)
 {
         cpufreq_frequency_table_put_attr(policy->cpu);