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thermal: cpu_cooling: find max level during device registration

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CPU frequency tables don't update after the driver is registered and so we don't
need to iterate over them to find total number of states every time
cpufreq_get_max_state() is called. Do it once at boot time.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Viresh Kumar 2014-12-04 09:42:02 +05:30 committed by Eduardo Valentin
parent 521a2e5831
commit dcc6c7fdef
1 changed files with 15 additions and 13 deletions
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28
drivers/thermal/cpu_cooling.c
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@ -52,6 +52,8 @@
* cooling devices.
* @cpufreq_val: integer value representing the absolute value of the clipped
* frequency.
* @max_level: maximum cooling level. One less than total number of valid
* cpufreq frequencies.
* @allowed_cpus: all the cpus involved for this cpufreq_cooling_device.
*
* This structure is required for keeping information of each registered
@ -62,6 +64,7 @@ struct cpufreq_cooling_device {
struct thermal_cooling_device *cool_dev;
unsigned int cpufreq_state;
unsigned int cpufreq_val;
unsigned int max_level;
struct cpumask allowed_cpus;
struct list_head node;
};
@ -283,19 +286,9 @@ static int cpufreq_get_max_state(struct thermal_cooling_device *cdev,
unsigned long *state)
{
struct cpufreq_cooling_device *cpufreq_device = cdev->devdata;
struct cpumask *mask = &cpufreq_device->allowed_cpus;
unsigned int cpu;
unsigned int count = 0;
int ret;
cpu = cpumask_any(mask);
ret = get_property(cpu, 0, &count, GET_MAXL);
if (count > 0)
*state = count;
return ret;
*state = cpufreq_device->max_level;
return 0;
}
/**
@ -385,9 +378,11 @@ __cpufreq_cooling_register(struct device_node *np,
struct thermal_cooling_device *cool_dev;
struct cpufreq_cooling_device *cpufreq_dev;
char dev_name[THERMAL_NAME_LENGTH];
struct cpufreq_frequency_table *pos, *table;
int ret;
if (!cpufreq_frequency_get_table(cpumask_first(clip_cpus))) {
table = cpufreq_frequency_get_table(cpumask_first(clip_cpus));
if (!table) {
pr_debug("%s: CPUFreq table not found\n", __func__);
return ERR_PTR(-EPROBE_DEFER);
}
@ -404,6 +399,13 @@ __cpufreq_cooling_register(struct device_node *np,
goto free_cdev;
}
/* Find max levels */
cpufreq_for_each_valid_entry(pos, table)
cpufreq_dev->max_level++;
/* max_level is an index, not a counter */
cpufreq_dev->max_level--;
cpumask_copy(&cpufreq_dev->allowed_cpus, clip_cpus);
ret = get_idr(&cpufreq_idr, &cpufreq_dev->id);