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cpufreq: introduce cpufreq_generic_get() routine

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CPUFreq drivers that use clock frameworks interface,i.e. clk_get_rate(),
to get CPUs clk rate, have similar sort of code used in most of them.

This patch adds a generic ->get() which will do the same thing for them.
All those drivers are required to now is to set .get to cpufreq_generic_get()
and set their clk pointer in policy->clk during ->init().

Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
2014-01-09 20:38:43 +05:30
committed by Rafael J. Wysocki
parent 0ad04fb30d
commit 652ed95d5f
18 changed files with 112 additions and 229 deletions
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17
drivers/cpufreq/at32ap-cpufreq.c
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@@ -21,17 +21,8 @@
#include <linux/export.h>
#include <linux/slab.h>
static struct clk *cpuclk;
static struct cpufreq_frequency_table *freq_table;
static unsigned int at32_get_speed(unsigned int cpu)
{
/* No SMP support */
if (cpu)
return 0;
return (unsigned int)((clk_get_rate(cpuclk) + 500) / 1000);
}
static unsigned int ref_freq;
static unsigned long loops_per_jiffy_ref;
@@ -39,7 +30,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
{
unsigned int old_freq, new_freq;
old_freq = at32_get_speed(0);
old_freq = policy->cur;
new_freq = freq_table[index].frequency;
if (!ref_freq) {
@@ -50,7 +41,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
if (old_freq < new_freq)
boot_cpu_data.loops_per_jiffy = cpufreq_scale(
loops_per_jiffy_ref, ref_freq, new_freq);
clk_set_rate(cpuclk, new_freq * 1000);
clk_set_rate(policy->clk, new_freq * 1000);
if (new_freq < old_freq)
boot_cpu_data.loops_per_jiffy = cpufreq_scale(
loops_per_jiffy_ref, ref_freq, new_freq);
@@ -61,6 +52,7 @@ static int at32_set_target(struct cpufreq_policy *policy, unsigned int index)
static int at32_cpufreq_driver_init(struct cpufreq_policy *policy)
{
unsigned int frequency, rate, min_freq;
static struct clk *cpuclk;
int retval, steps, i;
if (policy->cpu != 0)
@@ -103,6 +95,7 @@ static int at32_cpufreq_driver_init(struct cpufreq_policy *policy)
frequency /= 2;
}
policy->clk = cpuclk;
freq_table[steps - 1].frequency = CPUFREQ_TABLE_END;
retval = cpufreq_table_validate_and_show(policy, freq_table);
@@ -123,7 +116,7 @@ static struct cpufreq_driver at32_driver = {
.init = at32_cpufreq_driver_init,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = at32_set_target,
.get = at32_get_speed,
.get = cpufreq_generic_get,
.flags = CPUFREQ_STICKY,
};