arch/arm/mach-omap2/dvfs.h

   1 /*
   2  * OMAP3/OMAP4 DVFS Management Routines
   3  *
   4  * Author: Vishwanath BS        <vishwanath.bs@ti.com>
   5  *
   6  * Copyright (C) 2011 Texas Instruments, Inc.
   7  * Vishwanath BS <vishwanath.bs@ti.com>
   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 __ARCH_ARM_MACH_OMAP2_DVFS_H
  15 #define __ARCH_ARM_MACH_OMAP2_DVFS_H
  16 #include <plat/omap_hwmod.h>
  17 #include "voltage.h"
  18
  19 #ifdef CONFIG_PM
  20 #include <linux/mutex.h>
  21 extern struct mutex omap_dvfs_lock;
  22 int omap_dvfs_register_device(struct device *dev, char *voltdm_name,
  23                 char *clk_name);
  24 int omap_device_scale(struct device *req_dev, struct device *target_dev,
  25                 unsigned long rate);
  26
  27 static inline bool omap_dvfs_is_any_dev_scaling(void)
  28 {
  29         return mutex_is_locked(&omap_dvfs_lock);
  30 }
  31 #else
  32 static inline int omap_dvfs_register_device(struct device *dev,
  33                 char *voltdm_name, char *clk_name)
  34 {
  35         return -EINVAL;
  36 }
  37 static inline int omap_device_scale(struct device *req_dev,
  38                 struct device *target_dev, unsigned long rate)
  39 {
  40         return -EINVAL;
  41 }
  42 static inline bool omap_dvfs_is_any_dev_scaling(void)
  43 {
  44         return false;
  45 }
  46 #endif
  47 #endif