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path: root/drivers/cpufreq/arm_big_little.h
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2017-11-08cpufreq: arm_big_little: make function arguments and structure pointer constBhumika Goyal
Make the arguments of functions bL_cpufreq_{register/unregister} as const as the ops pointer does not modify the fields of the cpufreq_arm_bL_ops structure it points to. The pointer arm_bL_ops is also getting initialized with ops but the pointer does not modify the fields. So, make the function argument and the structure pointer const. Add const to function prototypes too. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-05-05cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_tableSudeep Holla
Currently when performing random CPU hot-plugs and suspend-to-ram(S2R) on systems using arm_big_little cpufreq driver, we get warnings similar to something like below: cpu cpu1: _opp_add: duplicate OPPs detected. Existing: freq: 600000000, volt: 800000, enabled: 1. New: freq: 600000000, volt: 800000, enabled: 1 This is mainly because the OPPs for the shared cpus are not set. We can just use dev_pm_opp_of_cpumask_add_table in case the OPPs are obtained from DT(arm_big_little_dt.c) or use dev_pm_opp_set_sharing_cpus if the OPPs are obtained by other means like firmware(e.g. scpi-cpufreq.c) Also now that the generic dev_pm_opp{,_of}_cpumask_remove_table can handle removal of opp table and entries for all associated CPUs, we can re-use dev_pm_opp{,_of}_cpumask_remove_table as free_opp_table in cpufreq_arm_bL_ops. This patch makes necessary changes to reuse the generic OPP functions for {init,free}_opp_table and thereby eliminating the warnings. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15PM / OPP: Prefix exported opp routines with dev_pm_opp_Viresh Kumar
That's the naming convention followed in most of opp core, but few routines didn't follow this, fix them. Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15PM / OPP: Rename opp init/free table routinesViresh Kumar
free-table routines are opposite of init-table ones, and must be named to make that clear. Opposite of 'init' is 'exit', but those doesn't suit really well. Replace 'init' with 'add' and 'free' with 'remove'. Reported-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-02cpufreq: arm_big_little: free OPP table created during ->init()Viresh Kumar
OPP layer now supports freeing of OPPs and we should free them once they aren't useful anymore. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-31cpufreq: arm_big_little: add in-kernel switching (IKS) supportViresh Kumar
This patch adds IKS (In Kernel Switcher) support to cpufreq driver. This creates a combined freq table for A7-A15 CPU pairs. A7 frequencies are virtualized and scaled down to half the actual frequencies to approximate a linear scale across the combined A7+A15 range. When the requested frequency change crosses the A7-A15 boundary a cluster switch is invoked. Based on earlier work from Sudeep KarkadaNagesha. Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-05-12cpufreq: ARM big LITTLE: Move cpu_to_cluster() to arm_big_little.hViresh Kumar
The cpu_to_cluster() function may be used by glue drivers, so it's better to keep it in arm_big_little.h. [rjw: Changelog] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-04-02cpufreq: ARM big LITTLE: Add generic cpufreq driver and its DT glueViresh Kumar
big LITTLE is ARM's new Architecture focussing power/performance needs of modern world. More information about big LITTLE can be found here: http://www.arm.com/products/processors/technologies/biglittleprocessing.php http://lwn.net/Articles/481055/ In order to keep cpufreq support for all big LITTLE platforms simple/generic, this patch tries to add a generic cpufreq driver layer for all big LITTLE platforms. The driver is divided into two parts: - Core driver: Generic and shared across all big LITTLE SoC's - Glue drivers: Per platform drivers providing ops to the core driver This patch adds in a generic glue driver which would extract information from Device Tree. Future SoC's can either reuse the DT glue or write their own depending on the need. Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>