arch/arm/mach-keystone/pm_domain.c

   1 /*
   2  * PM domain driver for Keystone2 devices
   3  *
   4  * Copyright 2013 Texas Instruments, Inc.
   5  *      Santosh Shilimkar <santosh.shillimkar@ti.com>
   6  *
   7  * Based on Kevins work on DAVINCI SOCs
   8  *      Kevin Hilman <khilman@linaro.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms and conditions of the GNU General Public License,
  12  * version 2, as published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/init.h>
  16 #include <linux/pm_runtime.h>
  17 #include <linux/pm_clock.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/of.h>
  20
  21 #include "keystone.h"
  22
  23 static struct dev_pm_domain keystone_pm_domain = {
  24         .ops = {
  25                 USE_PM_CLK_RUNTIME_OPS
  26                 USE_PLATFORM_PM_SLEEP_OPS
  27         },
  28 };
  29
  30 static struct pm_clk_notifier_block platform_domain_notifier = {
  31         .pm_domain = &keystone_pm_domain,
  32 };
  33
  34 static const struct of_device_id of_keystone_table[] = {
  35         {.compatible = "ti,k2hk"},
  36         {.compatible = "ti,k2e"},
  37         {.compatible = "ti,k2l"},
  38         { /* end of list */ },
  39 };
  40
  41 int __init keystone_pm_runtime_init(void)
  42 {
  43         struct device_node *np;
  44
  45         np = of_find_matching_node(NULL, of_keystone_table);
  46         if (!np)
  47                 return 0;
  48
  49         pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
  50
  51         return 0;
  52 }