| /* |
| * PM domain driver for Keystone2 devices |
| * |
| * Copyright 2013 Texas Instruments, Inc. |
| * Santosh Shilimkar <santosh.shillimkar@ti.com> |
| * |
| * Based on Kevins work on DAVINCI SOCs |
| * Kevin Hilman <khilman@linaro.org> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/pm_clock.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk-provider.h> |
| #include <linux/of.h> |
| |
| #ifdef CONFIG_PM_RUNTIME |
| static int keystone_pm_runtime_suspend(struct device *dev) |
| { |
| int ret; |
| |
| dev_dbg(dev, "%s\n", __func__); |
| |
| ret = pm_generic_runtime_suspend(dev); |
| if (ret) |
| return ret; |
| |
| ret = pm_clk_suspend(dev); |
| if (ret) { |
| pm_generic_runtime_resume(dev); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int keystone_pm_runtime_resume(struct device *dev) |
| { |
| dev_dbg(dev, "%s\n", __func__); |
| |
| pm_clk_resume(dev); |
| |
| return pm_generic_runtime_resume(dev); |
| } |
| #endif |
| |
| static struct dev_pm_domain keystone_pm_domain = { |
| .ops = { |
| SET_RUNTIME_PM_OPS(keystone_pm_runtime_suspend, |
| keystone_pm_runtime_resume, NULL) |
| USE_PLATFORM_PM_SLEEP_OPS |
| }, |
| }; |
| |
| static struct pm_clk_notifier_block platform_domain_notifier = { |
| .pm_domain = &keystone_pm_domain, |
| }; |
| |
| static struct of_device_id of_keystone_table[] = { |
| {.compatible = "ti,keystone"}, |
| { /* end of list */ }, |
| }; |
| |
| int __init keystone_pm_runtime_init(void) |
| { |
| struct device_node *np; |
| |
| np = of_find_matching_node(NULL, of_keystone_table); |
| if (!np) |
| return 0; |
| |
| pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier); |
| |
| return 0; |
| } |