1/* 2 * Generic OPP Interface 3 * 4 * Copyright (C) 2009-2010 Texas Instruments Incorporated. 5 * Nishanth Menon 6 * Romit Dasgupta 7 * Kevin Hilman 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14#ifndef __LINUX_OPP_H__ 15#define __LINUX_OPP_H__ 16 17#include <linux/err.h> 18#include <linux/notifier.h> 19 20struct dev_pm_opp; 21struct device; 22 23enum dev_pm_opp_event { 24 OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE, 25}; 26 27#if defined(CONFIG_PM_OPP) 28 29unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp); 30 31unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp); 32 33bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp); 34 35int dev_pm_opp_get_opp_count(struct device *dev); 36unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev); 37struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev); 38 39struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, 40 unsigned long freq, 41 bool available); 42 43struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, 44 unsigned long *freq); 45 46struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, 47 unsigned long *freq); 48 49int dev_pm_opp_add(struct device *dev, unsigned long freq, 50 unsigned long u_volt); 51void dev_pm_opp_remove(struct device *dev, unsigned long freq); 52 53int dev_pm_opp_enable(struct device *dev, unsigned long freq); 54 55int dev_pm_opp_disable(struct device *dev, unsigned long freq); 56 57struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev); 58#else 59static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) 60{ 61 return 0; 62} 63 64static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) 65{ 66 return 0; 67} 68 69static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) 70{ 71 return false; 72} 73 74static inline int dev_pm_opp_get_opp_count(struct device *dev) 75{ 76 return 0; 77} 78 79static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) 80{ 81 return 0; 82} 83 84static inline struct dev_pm_opp *dev_pm_opp_get_suspend_opp(struct device *dev) 85{ 86 return NULL; 87} 88 89static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, 90 unsigned long freq, bool available) 91{ 92 return ERR_PTR(-EINVAL); 93} 94 95static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, 96 unsigned long *freq) 97{ 98 return ERR_PTR(-EINVAL); 99} 100 101static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, 102 unsigned long *freq) 103{ 104 return ERR_PTR(-EINVAL); 105} 106 107static inline int dev_pm_opp_add(struct device *dev, unsigned long freq, 108 unsigned long u_volt) 109{ 110 return -EINVAL; 111} 112 113static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq) 114{ 115} 116 117static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq) 118{ 119 return 0; 120} 121 122static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq) 123{ 124 return 0; 125} 126 127static inline struct srcu_notifier_head *dev_pm_opp_get_notifier( 128 struct device *dev) 129{ 130 return ERR_PTR(-EINVAL); 131} 132#endif /* CONFIG_PM_OPP */ 133 134#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF) 135int dev_pm_opp_of_add_table(struct device *dev); 136void dev_pm_opp_of_remove_table(struct device *dev); 137int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask); 138void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask); 139int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask); 140int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask); 141#else 142static inline int dev_pm_opp_of_add_table(struct device *dev) 143{ 144 return -EINVAL; 145} 146 147static inline void dev_pm_opp_of_remove_table(struct device *dev) 148{ 149} 150 151static inline int dev_pm_opp_of_cpumask_add_table(cpumask_var_t cpumask) 152{ 153 return -ENOSYS; 154} 155 156static inline void dev_pm_opp_of_cpumask_remove_table(cpumask_var_t cpumask) 157{ 158} 159 160static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask) 161{ 162 return -ENOSYS; 163} 164 165static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, cpumask_var_t cpumask) 166{ 167 return -ENOSYS; 168} 169#endif 170 171#endif /* __LINUX_OPP_H__ */ 172