Eric Lee / smarc-fsl-linux-kernel

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include/linux/opp.h 2.74 KB
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e1f60b292   Nishanth Menon   PM: Introduce lib... 
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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>
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  #include <linux/notifier.h>
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  struct opp;
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  enum opp_event {
  	OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
  };
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  #if defined(CONFIG_PM_OPP)
  
  unsigned long opp_get_voltage(struct opp *opp);
  
  unsigned long opp_get_freq(struct opp *opp);
  
  int opp_get_opp_count(struct device *dev);
  
  struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
  				bool available);
  
  struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq);
  
  struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq);
  
  int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt);
  
  int opp_enable(struct device *dev, unsigned long freq);
  
  int opp_disable(struct device *dev, unsigned long freq);
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  struct srcu_notifier_head *opp_get_notifier(struct device *dev);
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  #else
  static inline unsigned long opp_get_voltage(struct opp *opp)
  {
  	return 0;
  }
  
  static inline unsigned long opp_get_freq(struct opp *opp)
  {
  	return 0;
  }
  
  static inline int opp_get_opp_count(struct device *dev)
  {
  	return 0;
  }
  
  static inline struct opp *opp_find_freq_exact(struct device *dev,
  					unsigned long freq, bool available)
  {
  	return ERR_PTR(-EINVAL);
  }
  
  static inline struct opp *opp_find_freq_floor(struct device *dev,
  					unsigned long *freq)
  {
  	return ERR_PTR(-EINVAL);
  }
  
  static inline struct opp *opp_find_freq_ceil(struct device *dev,
  					unsigned long *freq)
  {
  	return ERR_PTR(-EINVAL);
  }
  
  static inline int opp_add(struct device *dev, unsigned long freq,
  					unsigned long u_volt)
  {
  	return -EINVAL;
  }
  
  static inline int opp_enable(struct device *dev, unsigned long freq)
  {
  	return 0;
  }
  
  static inline int opp_disable(struct device *dev, unsigned long freq)
  {
  	return 0;
  }
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a96d69d1b
 
 Tony Lindgren
 
PM / OPP: Fix bui...




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  static inline struct srcu_notifier_head *opp_get_notifier(struct device *dev)









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 MyungJoo Ham
 
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  {
  	return ERR_PTR(-EINVAL);
  }









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  #endif		/* CONFIG_PM_OPP */









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  #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
  int opp_init_cpufreq_table(struct device *dev,
  			    struct cpufreq_frequency_table **table);









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  void opp_free_cpufreq_table(struct device *dev,
  				struct cpufreq_frequency_table **table);









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 Nishanth Menon
 
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  #else
  static inline int opp_init_cpufreq_table(struct device *dev,
  			    struct cpufreq_frequency_table **table)
  {
  	return -EINVAL;
  }









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  static inline
  void opp_free_cpufreq_table(struct device *dev,
  				struct cpufreq_frequency_table **table)
  {
  }









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 Nishanth Menon
 
PM: Introduce lib...




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  #endif		/* CONFIG_CPU_FREQ */
  
  #endif		/* __LINUX_OPP_H__ */