diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-06-28 10:59:12 -0700 |
|---|---|---|
| committer | Eugeni Dodonov <eugeni.dodonov@intel.com> | 2012-01-11 15:42:45 -0200 |
| commit | 8e9b5a7a2f68ffc04605db1c3def6d2cd9ec6b8f (patch) | |
| tree | 24de6e21414e5aea03d0f38d28e323ee5cd27f94 | |
| parent | fc802f6e41019f34c52c05fd47361ecb71246861 (diff) | |
cpufreq: expose a cpufreq_quick_get_max routinev3.0.16-drm-intel-backports
This allows drivers and other code to get the max reported CPU frequency.
Initial use is for scaling ring frequency with GPU frequency in the i915
driver.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 20 | ||||
| -rw-r--r-- | include/linux/cpufreq.h | 5 |
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 0a5bea9e358..987a165ede2 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1199,6 +1199,26 @@ unsigned int cpufreq_quick_get(unsigned int cpu) } EXPORT_SYMBOL(cpufreq_quick_get); +/** + * cpufreq_quick_get_max - get the max reported CPU frequency for this CPU + * @cpu: CPU number + * + * Just return the max possible frequency for a given CPU. + */ +unsigned int cpufreq_quick_get_max(unsigned int cpu) +{ + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + unsigned int ret_freq = 0; + + if (policy) { + ret_freq = policy->max; + cpufreq_cpu_put(policy); + } + + return ret_freq; +} +EXPORT_SYMBOL(cpufreq_quick_get_max); + static unsigned int __cpufreq_get(unsigned int cpu) { diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 11be48e0d16..6216115c778 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -324,11 +324,16 @@ static inline unsigned int cpufreq_get(unsigned int cpu) /* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */ #ifdef CONFIG_CPU_FREQ unsigned int cpufreq_quick_get(unsigned int cpu); +unsigned int cpufreq_quick_get_max(unsigned int cpu); #else static inline unsigned int cpufreq_quick_get(unsigned int cpu) { return 0; } +static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) +{ + return 0; +} #endif |