arch/arm/mach-keystone/pm_domain.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * PM domain driver for Keystone2 devices
   4  *
   5  * Copyright 2013 Texas Instruments, Inc.
   6  *      Santosh Shilimkar <santosh.shillimkar@ti.com>
   7  *
   8  * Based on Kevins work on DAVINCI SOCs
   9  *      Kevin Hilman <khilman@linaro.org>
  10  */
  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 #include "keystone.h"
  19
  20 static struct dev_pm_domain keystone_pm_domain = {
  21         .ops = {
  22                 USE_PM_CLK_RUNTIME_OPS
  23                 USE_PLATFORM_PM_SLEEP_OPS
  24         },
  25 };
  26
  27 static struct pm_clk_notifier_block platform_domain_notifier = {
  28         .pm_domain = &keystone_pm_domain,
  29         .con_ids = { NULL },
  30 };
  31
  32 static const struct of_device_id of_keystone_table[] = {
  33         {.compatible = "ti,k2hk"},
  34         {.compatible = "ti,k2e"},
  35         {.compatible = "ti,k2l"},
  36         { /* end of list */ },
  37 };
  38
  39 int __init keystone_pm_runtime_init(void)
  40 {
  41         struct device_node *np;
  42
  43         np = of_find_matching_node(NULL, of_keystone_table);
  44         if (!np)
  45                 return 0;
  46
  47         pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
  48
  49         return 0;
  50 }