2 * ARM big.LITTLE platform's CPUFreq header file
4 * Copyright (C) 2013 ARM Ltd.
5 * Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
7 * Copyright (C) 2013 Linaro.
8 * Viresh Kumar <viresh.kumar@linaro.org>
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.
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.
19 #ifndef CPUFREQ_ARM_BIG_LITTLE_H
20 #define CPUFREQ_ARM_BIG_LITTLE_H
22 #include <linux/cpufreq.h>
23 #include <linux/device.h>
24 #include <linux/types.h>
26 /* Currently we support only two clusters */
29 #define MAX_CLUSTERS 2
31 #ifdef CONFIG_BL_SWITCHER
32 extern bool bL_switching_enabled;
33 #define is_bL_switching_enabled() bL_switching_enabled
34 #define set_switching_enabled(x) (bL_switching_enabled = (x))
36 #define is_bL_switching_enabled() false
37 #define set_switching_enabled(x) do { } while (0)
40 struct cpufreq_arm_bL_ops {
41 char name[CPUFREQ_NAME_LEN];
42 int (*get_transition_latency)(struct device *cpu_dev);
45 * This must set opp table for cpu_dev in a similar way as done by
46 * of_init_opp_table().
48 int (*init_opp_table)(struct device *cpu_dev);
51 static inline int cpu_to_cluster(int cpu)
53 return is_bL_switching_enabled() ? MAX_CLUSTERS:
54 topology_physical_package_id(cpu);
57 int bL_cpufreq_register(struct cpufreq_arm_bL_ops *ops);
58 void bL_cpufreq_unregister(struct cpufreq_arm_bL_ops *ops);
60 #endif /* CPUFREQ_ARM_BIG_LITTLE_H */