arch/arm/mach-davinci/pm_domain.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Runtime PM support code for DaVinci
   4  *
   5  * Author: Kevin Hilman
   6  *
   7  * Copyright (C) 2012 Texas Instruments, Inc.
   8  */
   9 #include <linux/init.h>
  10 #include <linux/pm_runtime.h>
  11 #include <linux/pm_clock.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/of.h>
  14
  15 static struct dev_pm_domain davinci_pm_domain = {
  16         .ops = {
  17                 USE_PM_CLK_RUNTIME_OPS
  18                 USE_PLATFORM_PM_SLEEP_OPS
  19         },
  20 };
  21
  22 static struct pm_clk_notifier_block platform_bus_notifier = {
  23         .pm_domain = &davinci_pm_domain,
  24         .con_ids = { "fck", "master", "slave", NULL },
  25 };
  26
  27 static int __init davinci_pm_runtime_init(void)
  28 {
  29         if (of_have_populated_dt())
  30                 return 0;
  31
  32         /* Use pm_clk as fallback if we're not using genpd. */
  33         pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
  34
  35         return 0;
  36 }
  37 core_initcall(davinci_pm_runtime_init);