drivers/cpufreq/arm_big_little.h

   1 /*
   2  * ARM big.LITTLE platform's CPUFreq header file
   3  *
   4  * Copyright (C) 2013 ARM Ltd.
   5  * Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
   6  *
   7  * Copyright (C) 2013 Linaro.
   8  * Viresh Kumar <viresh.kumar@linaro.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  15  * kind, whether express or implied; without even the implied warranty
  16  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  */
  19 #ifndef CPUFREQ_ARM_BIG_LITTLE_H
  20 #define CPUFREQ_ARM_BIG_LITTLE_H
  21
  22 #include <linux/cpufreq.h>
  23 #include <linux/device.h>
  24 #include <linux/types.h>
  25
  26 struct cpufreq_arm_bL_ops {
  27         char name[CPUFREQ_NAME_LEN];
  28         int (*get_transition_latency)(struct device *cpu_dev);
  29
  30         /*
  31          * This must set opp table for cpu_dev in a similar way as done by
  32          * of_init_opp_table().
  33          */
  34         int (*init_opp_table)(struct device *cpu_dev);
  35 };
  36
  37 static inline int cpu_to_cluster(int cpu)
  38 {
  39         return topology_physical_package_id(cpu);
  40 }
  41
  42 int bL_cpufreq_register(struct cpufreq_arm_bL_ops *ops);
  43 void bL_cpufreq_unregister(struct cpufreq_arm_bL_ops *ops);
  44
  45 #endif /* CPUFREQ_ARM_BIG_LITTLE_H */