projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| fc20ffe1 SS |
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/clk-provider.h> | |
| 20 | ||
| 21 | #ifdef CONFIG_PM_RUNTIME | |
| 22 | static int keystone_pm_runtime_suspend(struct device *dev) | |
| 23 | { | |
| 24 | int ret; | |
| 25 | ||
| 26 | dev_dbg(dev, "%s\n", __func__); | |
| 27 | ||
| 28 | ret = pm_generic_runtime_suspend(dev); | |
| 29 | if (ret) | |
| 30 | return ret; | |
| 31 | ||
| 32 | ret = pm_clk_suspend(dev); | |
| 33 | if (ret) { | |
| 34 | pm_generic_runtime_resume(dev); | |
| 35 | return ret; | |
| 36 | } | |
| 37 | ||
| 38 | return 0; | |
| 39 | } | |
| 40 | ||
| 41 | static int keystone_pm_runtime_resume(struct device *dev) | |
| 42 | { | |
| 43 | dev_dbg(dev, "%s\n", __func__); | |
| 44 | ||
| 45 | pm_clk_resume(dev); | |
| 46 | ||
| 47 | return pm_generic_runtime_resume(dev); | |
| 48 | } | |
| 49 | #endif | |
| 50 | ||
| 51 | static struct dev_pm_domain keystone_pm_domain = { | |
| 52 | .ops = { | |
| 53 | SET_RUNTIME_PM_OPS(keystone_pm_runtime_suspend, | |
| 54 | keystone_pm_runtime_resume, NULL) | |
| 55 | USE_PLATFORM_PM_SLEEP_OPS | |
| 56 | }, | |
| 57 | }; | |
| 58 | ||
| 59 | static struct pm_clk_notifier_block platform_domain_notifier = { | |
| 60 | .pm_domain = &keystone_pm_domain, | |
| 61 | }; | |
| 62 | ||
| 63 | int __init keystone_pm_runtime_init(void) | |
| 64 | { | |
| 65 | of_clk_init(NULL); | |
| 66 | pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier); | |
| 67 | ||
| 68 | return 0; | |
| 69 | } | |
| 70 | subsys_initcall(keystone_pm_runtime_init); |