arm/mach-keystone/pm_domain.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * PM domain driver for Keystone2 devices
0004  *
0005  * Copyright 2013 Texas Instruments, Inc.
0006  *  Santosh Shilimkar <santosh.shillimkar@ti.com>
0007  *
0008  * Based on Kevins work on DAVINCI SOCs
0009  *  Kevin Hilman <khilman@linaro.org>
0010  */
0011
0012 #include <linux/init.h>
0013 #include <linux/pm_runtime.h>
0014 #include <linux/pm_clock.h>
0015 #include <linux/platform_device.h>
0016 #include <linux/of.h>
0017
0018 #include "keystone.h"
0019
0020 static struct dev_pm_domain keystone_pm_domain = {
0021     .ops = {
0022         USE_PM_CLK_RUNTIME_OPS
0023         USE_PLATFORM_PM_SLEEP_OPS
0024     },
0025 };
0026
0027 static struct pm_clk_notifier_block platform_domain_notifier = {
0028     .pm_domain = &keystone_pm_domain,
0029     .con_ids = { NULL },
0030 };
0031
0032 static const struct of_device_id of_keystone_table[] = {
0033     {.compatible = "ti,k2hk"},
0034     {.compatible = "ti,k2e"},
0035     {.compatible = "ti,k2l"},
0036     { /* end of list */ },
0037 };
0038
0039 int __init keystone_pm_runtime_init(void)
0040 {
0041     struct device_node *np;
0042
0043     np = of_find_matching_node(NULL, of_keystone_table);
0044     if (!np)
0045         return 0;
0046
0047     pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
0048
0049     return 0;
0050 }