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cpufreq: Simplify core code related to boost support 

Notice that the boost_supported field in struct cpufreq_driver is
redundant, because the driver's ->set_boost callback may be left
unset if "boost" is not supported.  Moreover, the only driver
populating the ->set_boost callback is acpi_cpufreq, so make it
avoid populating that callback if "boost" is not supported, rework
the core to check ->set_boost instead of boost_supported to
verify "boost" support and drop boost_supported which isn't
used any more.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Rafael J. Wysocki 2015-12-27 00:27:38 +01:00
parent 17135782b8
commit 7a6c79f2fe
3 changed files with 9 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/cpufreq/acpi-cpufreq.c
View File

@ -164,7 +164,7 @@ static ssize_t store_cpb(struct cpufreq_policy *policy, const char *buf,
int ret;
unsigned int val = 0;
if (!acpi_cpufreq_driver.boost_supported)
if (!acpi_cpufreq_driver.set_boost)
return -EINVAL;
ret = kstrtouint(buf, 10, &val);
@ -900,7 +900,6 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
.resume = acpi_cpufreq_resume,
.name = "acpi-cpufreq",
.attr = acpi_cpufreq_attr,
.set_boost = set_boost,
};
static void __init acpi_cpufreq_boost_init(void)
@ -911,7 +910,7 @@ static void __init acpi_cpufreq_boost_init(void)
if (!msrs)
return;
acpi_cpufreq_driver.boost_supported = true;
acpi_cpufreq_driver.set_boost = set_boost;
acpi_cpufreq_driver.boost_enabled = boost_state(0);
cpu_notifier_register_begin();

22
drivers/cpufreq/cpufreq.c
View File

@ -2332,23 +2332,13 @@ int cpufreq_boost_trigger_state(int state)
static bool cpufreq_boost_supported(void)
{
return likely(cpufreq_driver) && cpufreq_driver->boost_supported;
return likely(cpufreq_driver) && cpufreq_driver->set_boost;
}
static int create_boost_sysfs_file(void)
{
int ret;
if (!cpufreq_boost_supported())
return 0;
/*
* Check if driver provides function to enable boost -
* if not, use cpufreq_boost_set_sw as default
*/
if (!cpufreq_driver->set_boost)
cpufreq_driver->set_boost = cpufreq_boost_set_sw;
ret = sysfs_create_file(cpufreq_global_kobject, &boost.attr);
if (ret)
pr_err("%s: cannot register global BOOST sysfs file\n",
@ -2371,7 +2361,7 @@ int cpufreq_enable_boost_support(void)
if (cpufreq_boost_supported())
return 0;
cpufreq_driver->boost_supported = true;
cpufreq_driver->set_boost = cpufreq_boost_set_sw;
/* This will get removed on driver unregister */
return create_boost_sysfs_file();
@ -2431,9 +2421,11 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
if (driver_data->setpolicy)
driver_data->flags |= CPUFREQ_CONST_LOOPS;
ret = create_boost_sysfs_file();
if (ret)
goto err_null_driver;
if (cpufreq_boost_supported()) {
ret = create_boost_sysfs_file();
if (ret)
goto err_null_driver;
}
ret = subsys_interface_register(&cpufreq_interface);
if (ret)

1
include/linux/cpufreq.h
View File

@ -278,7 +278,6 @@ struct cpufreq_driver {
struct freq_attr **attr;
/* platform specific boost support code */
bool boost_supported;
bool boost_enabled;
int (*set_boost)(int state);
};