release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-omap2/pm.c

   1 /*
   2  * pm.c - Common OMAP2+ power management-related code
   3  *
   4  * Copyright (C) 2010 Texas Instruments, Inc.
   5  * Copyright (C) 2010 Nokia Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15 #include <linux/err.h>
  16
  17 #include <plat/omap-pm.h>
  18 #include <plat/omap_device.h>
  19 #include <plat/common.h>
  20
  21 static struct omap_device_pm_latency *pm_lats;
  22
  23 static struct device *mpu_dev;
  24 static struct device *dsp_dev;
  25 static struct device *l3_dev;
  26
  27 struct device *omap2_get_mpuss_device(void)
  28 {
  29         WARN_ON_ONCE(!mpu_dev);
  30         return mpu_dev;
  31 }
  32
  33 struct device *omap2_get_dsp_device(void)
  34 {
  35         WARN_ON_ONCE(!dsp_dev);
  36         return dsp_dev;
  37 }
  38
  39 struct device *omap2_get_l3_device(void)
  40 {
  41         WARN_ON_ONCE(!l3_dev);
  42         return l3_dev;
  43 }
  44
  45 /* static int _init_omap_device(struct omap_hwmod *oh, void *user) */
  46 static int _init_omap_device(char *name, struct device **new_dev)
  47 {
  48         struct omap_hwmod *oh;
  49         struct omap_device *od;
  50
  51         oh = omap_hwmod_lookup(name);
  52         if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
  53                  __func__, name))
  54                 return -ENODEV;
  55
  56         od = omap_device_build(oh->name, 0, oh, NULL, 0, pm_lats, 0, false);
  57         if (WARN(IS_ERR(od), "%s: could not build omap_device for %s\n",
  58                  __func__, name))
  59                 return -ENODEV;
  60
  61         *new_dev = &od->pdev.dev;
  62
  63         return 0;
  64 }
  65
  66 /*
  67  * Build omap_devices for processors and bus.
  68  */
  69 static void omap2_init_processor_devices(void)
  70 {
  71         _init_omap_device("mpu", &mpu_dev);
  72         _init_omap_device("iva", &dsp_dev);
  73         _init_omap_device("l3_main", &l3_dev);
  74 }
  75
  76 static int __init omap2_common_pm_init(void)
  77 {
  78         omap2_init_processor_devices();
  79         omap_pm_if_init();
  80
  81         return 0;
  82 }
  83 device_initcall(omap2_common_pm_init);