arch/arm/mach-davinci/pm_domain.c

   1 /*
   2  * Runtime PM support code for DaVinci
   3  *
   4  * Author: Kevin Hilman
   5  *
   6  * Copyright (C) 2012 Texas Instruments, Inc.
   7  *
   8  * This file is licensed under the terms of the GNU General Public
   9  * License version 2. This program is licensed "as is" without any
  10  * warranty of any kind, whether express or implied.
  11  */
  12 #include <linux/init.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/pm_clock.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/of.h>
  17
  18 static struct dev_pm_domain davinci_pm_domain = {
  19         .ops = {
  20                 USE_PM_CLK_RUNTIME_OPS
  21                 USE_PLATFORM_PM_SLEEP_OPS
  22         },
  23 };
  24
  25 static struct pm_clk_notifier_block platform_bus_notifier = {
  26         .pm_domain = &davinci_pm_domain,
  27         .con_ids = { "fck", "master", "slave", NULL },
  28 };
  29
  30 static int __init davinci_pm_runtime_init(void)
  31 {
  32         if (of_have_populated_dt())
  33                 return 0;
  34
  35         /* Use pm_clk as fallback if we're not using genpd. */
  36         pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
  37
  38         return 0;
  39 }
  40 core_initcall(davinci_pm_runtime_init);