2013-04-01 16:57:49 +04:00
/*
* ARM big . LITTLE platform ' s CPUFreq header file
*
* Copyright ( C ) 2013 ARM Ltd .
* Sudeep KarkadaNagesha < sudeep . karkadanagesha @ arm . com >
*
* Copyright ( C ) 2013 Linaro .
* Viresh Kumar < viresh . kumar @ linaro . org >
*
* This program is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation .
*
* This program is distributed " as is " WITHOUT ANY WARRANTY of any
* kind , whether express or implied ; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*/
# ifndef CPUFREQ_ARM_BIG_LITTLE_H
# define CPUFREQ_ARM_BIG_LITTLE_H
# include <linux/cpufreq.h>
# include <linux/device.h>
# include <linux/types.h>
struct cpufreq_arm_bL_ops {
char name [ CPUFREQ_NAME_LEN ] ;
/*
* This must set opp table for cpu_dev in a similar way as done by
2015-09-04 11:17:24 +03:00
* dev_pm_opp_of_add_table ( ) .
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*/
cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_table
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>
2016-05-03 17:05:05 +03:00
int ( * init_opp_table ) ( const struct cpumask * cpumask ) ;
2014-11-25 13:34:20 +03:00
/* Optional */
int ( * get_transition_latency ) ( struct device * cpu_dev ) ;
cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_table
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>
2016-05-03 17:05:05 +03:00
void ( * free_opp_table ) ( const struct cpumask * cpumask ) ;
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} ;
int bL_cpufreq_register ( struct cpufreq_arm_bL_ops * ops ) ;
void bL_cpufreq_unregister ( struct cpufreq_arm_bL_ops * ops ) ;
# endif /* CPUFREQ_ARM_BIG_LITTLE_H */