Exactly like the cpuidle subsystem separates core cpuidle flags from driver-specific cpuidle flags, this commit extends the cpufreq subsystem with the same idea: the cpufreq_driver->flags field contain the existing core cpufreq flags in the low 16 bits, and driver-specific flags in the high 16 bits.
A new function called cpufreq_get_driver_flags() is added to allow a cpufreq driver to retrieve those flags, since they are typically needed from a cpufreq_policy->init() callback, which does not have access to the cpufreq_driver structure. This function call is similar to the existing cpufreq_get_current_driver() function call. Signed-off-by: Thomas Petazzoni <[email protected]> --- drivers/cpufreq/cpufreq.c | 15 +++++++++++++++ include/linux/cpufreq.h | 5 ++++- 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index d9fdedd..e41b971 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -1728,6 +1728,21 @@ const char *cpufreq_get_current_driver(void) } EXPORT_SYMBOL_GPL(cpufreq_get_current_driver); +/** + * cpufreq_get_driver_flags - return current driver's flags + * + * Return the flags of the currently loaded cpufreq driver, or 0 + * if none. + */ +unsigned int cpufreq_get_driver_flags(void) +{ + if (cpufreq_driver) + return cpufreq_driver->flags & CPUFREQ_DRIVER_FLAGS_MASK; + + return 0; +} +EXPORT_SYMBOL_GPL(cpufreq_get_driver_flags); + /********************************************************************* * NOTIFIER LISTS INTERFACE * *********************************************************************/ diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 138336b..fa35601 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -218,7 +218,7 @@ __ATTR(_name, 0644, show_##_name, store_##_name) struct cpufreq_driver { char name[CPUFREQ_NAME_LEN]; - u8 flags; + unsigned int flags; /* needed by all drivers */ int (*init) (struct cpufreq_policy *policy); @@ -308,10 +308,13 @@ struct cpufreq_driver { */ #define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5) +#define CPUFREQ_DRIVER_FLAGS_MASK (0xFFFF0000) + int cpufreq_register_driver(struct cpufreq_driver *driver_data); int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); const char *cpufreq_get_current_driver(void); +unsigned int cpufreq_get_driver_flags(void); static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, unsigned int min, unsigned int max) -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
