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/* * Generic OPP Interface * * Copyright (C) 2009-2010 Texas Instruments Incorporated. * Nishanth Menon * Romit Dasgupta * Kevin Hilman * * 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. */ #ifndef __LINUX_OPP_H__ #define __LINUX_OPP_H__ #include <linux/err.h> #include <linux/cpufreq.h> #include <linux/notifier.h> struct dev_pm_opp; struct device; enum dev_pm_opp_event { OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE, }; #if defined(CONFIG_PM_OPP) unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp); unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp); int dev_pm_opp_get_opp_count(struct device *dev); struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, unsigned long freq, bool available); struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, unsigned long *freq); struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, unsigned long *freq); int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt); int dev_pm_opp_enable(struct device *dev, unsigned long freq); int dev_pm_opp_disable(struct device *dev, unsigned long freq); struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev); #else static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) { return 0; } static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) { return 0; } static inline int dev_pm_opp_get_opp_count(struct device *dev) { return 0; } static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, unsigned long freq, bool available) { return ERR_PTR(-EINVAL); } static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, unsigned long *freq) { return ERR_PTR(-EINVAL); } static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, unsigned long *freq) { return ERR_PTR(-EINVAL); } static inline int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) { return -EINVAL; } static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq) { return 0; } static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq) { return 0; } static inline struct srcu_notifier_head *dev_pm_opp_get_notifier( struct device *dev) { return ERR_PTR(-EINVAL); } #endif /* CONFIG_PM_OPP */ #if defined(CONFIG_PM_OPP) && defined(CONFIG_OF) int of_init_opp_table(struct device *dev); #else static inline int of_init_opp_table(struct device *dev) { return -EINVAL; } #endif #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) int dev_pm_opp_init_cpufreq_table(struct device *dev, struct cpufreq_frequency_table **table); void dev_pm_opp_free_cpufreq_table(struct device *dev, struct cpufreq_frequency_table **table); #else static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, struct cpufreq_frequency_table **table) { return -EINVAL; } static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, struct cpufreq_frequency_table **table) { } #endif /* CONFIG_CPU_FREQ */ #endif /* __LINUX_OPP_H__ */