projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| e933ec7c KH |
1 | /* |
| 2 | * Runtime PM support code for OMAP1 | |
| 3 | * | |
| 4 | * Author: Kevin Hilman, Deep Root Systems, LLC | |
| 5 | * | |
| 6 | * Copyright (C) 2010 Texas Instruments, Inc. | |
| 7 | * | |
| 8 | * This file is licensed under the terms of the GNU General Public | |
| 9 | * License version 2. This program is licensed "as is" without any | |
| 10 | * warranty of any kind, whether express or implied. | |
| 11 | */ | |
| 12 | #include <linux/init.h> | |
| 13 | #include <linux/kernel.h> | |
| 14 | #include <linux/io.h> | |
| 15 | #include <linux/pm_runtime.h> | |
| b5e8d269 | 16 | #include <linux/pm_clock.h> |
| e933ec7c KH |
17 | #include <linux/platform_device.h> |
| 18 | #include <linux/mutex.h> | |
| 19 | #include <linux/clk.h> | |
| 20 | #include <linux/err.h> | |
| 21 | ||
| e933ec7c KH |
22 | #ifdef CONFIG_PM_RUNTIME |
| 23 | static int omap1_pm_runtime_suspend(struct device *dev) | |
| 24 | { | |
| 600b776e | 25 | int ret; |
| e933ec7c KH |
26 | |
| 27 | dev_dbg(dev, "%s\n", __func__); | |
| 28 | ||
| 29 | ret = pm_generic_runtime_suspend(dev); | |
| 600b776e RW |
30 | if (ret) |
| 31 | return ret; | |
| e933ec7c | 32 | |
| 3d5c3036 | 33 | ret = pm_clk_suspend(dev); |
| 600b776e RW |
34 | if (ret) { |
| 35 | pm_generic_runtime_resume(dev); | |
| 36 | return ret; | |
| e933ec7c KH |
37 | } |
| 38 | ||
| 39 | return 0; | |
| 600b776e | 40 | } |
| e933ec7c KH |
41 | |
| 42 | static int omap1_pm_runtime_resume(struct device *dev) | |
| 43 | { | |
| e933ec7c KH |
44 | dev_dbg(dev, "%s\n", __func__); |
| 45 | ||
| 3d5c3036 | 46 | pm_clk_resume(dev); |
| 600b776e RW |
47 | return pm_generic_runtime_resume(dev); |
| 48 | } | |
| e933ec7c | 49 | |
| 564b905a | 50 | static struct dev_pm_domain default_pm_domain = { |
| 600b776e RW |
51 | .ops = { |
| 52 | .runtime_suspend = omap1_pm_runtime_suspend, | |
| 53 | .runtime_resume = omap1_pm_runtime_resume, | |
| 54 | USE_PLATFORM_PM_SLEEP_OPS | |
| 55 | }, | |
| 56 | }; | |
| 564b905a | 57 | #define OMAP1_PM_DOMAIN (&default_pm_domain) |
| e9e35c5a | 58 | #else |
| 564b905a | 59 | #define OMAP1_PM_DOMAIN NULL |
| e9e35c5a | 60 | #endif /* CONFIG_PM_RUNTIME */ |
| e933ec7c | 61 | |
| 600b776e | 62 | static struct pm_clk_notifier_block platform_bus_notifier = { |
| 564b905a | 63 | .pm_domain = OMAP1_PM_DOMAIN, |
| 600b776e | 64 | .con_ids = { "ick", "fck", NULL, }, |
| e933ec7c KH |
65 | }; |
| 66 | ||
| 67 | static int __init omap1_pm_runtime_init(void) | |
| 68 | { | |
| 7f9187c2 TL |
69 | if (!cpu_class_is_omap1()) |
| 70 | return -ENODEV; | |
| 71 | ||
| 3d5c3036 | 72 | pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier); |
| e933ec7c KH |
73 | |
| 74 | return 0; | |
| 75 | } | |
| 76 | core_initcall(omap1_pm_runtime_init); | |
| e9e35c5a | 77 |