| Changhwan Youn | d930596 | 2010-12-03 17:14:57 +0900 | [diff] [blame] | 1 | /* linux/arch/arm/plat-samsung/pd.c |
| 2 | * |
| 3 | * Copyright (c) 2010 Samsung Electronics Co., Ltd. |
| 4 | * http://www.samsung.com |
| 5 | * |
| 6 | * Samsung Power domain support |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/pm_runtime.h> |
| 18 | |
| 19 | #include <plat/pd.h> |
| 20 | |
| 21 | static int samsung_pd_probe(struct platform_device *pdev) |
| 22 | { |
| 23 | struct samsung_pd_info *pdata = pdev->dev.platform_data; |
| 24 | struct device *dev = &pdev->dev; |
| 25 | |
| 26 | if (!pdata) { |
| 27 | dev_err(dev, "no device data specified\n"); |
| 28 | return -ENOENT; |
| 29 | } |
| 30 | |
| 31 | pm_runtime_set_active(dev); |
| 32 | pm_runtime_enable(dev); |
| 33 | |
| 34 | dev_info(dev, "power domain registered\n"); |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | static int __devexit samsung_pd_remove(struct platform_device *pdev) |
| 39 | { |
| 40 | struct device *dev = &pdev->dev; |
| 41 | |
| 42 | pm_runtime_disable(dev); |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static int samsung_pd_runtime_suspend(struct device *dev) |
| 47 | { |
| 48 | struct samsung_pd_info *pdata = dev->platform_data; |
| 49 | int ret = 0; |
| 50 | |
| 51 | if (pdata->disable) |
| 52 | ret = pdata->disable(dev); |
| 53 | |
| 54 | dev_dbg(dev, "suspended\n"); |
| 55 | return ret; |
| 56 | } |
| 57 | |
| 58 | static int samsung_pd_runtime_resume(struct device *dev) |
| 59 | { |
| 60 | struct samsung_pd_info *pdata = dev->platform_data; |
| 61 | int ret = 0; |
| 62 | |
| 63 | if (pdata->enable) |
| 64 | ret = pdata->enable(dev); |
| 65 | |
| 66 | dev_dbg(dev, "resumed\n"); |
| 67 | return ret; |
| 68 | } |
| 69 | |
| 70 | static const struct dev_pm_ops samsung_pd_pm_ops = { |
| 71 | .runtime_suspend = samsung_pd_runtime_suspend, |
| 72 | .runtime_resume = samsung_pd_runtime_resume, |
| 73 | }; |
| 74 | |
| 75 | static struct platform_driver samsung_pd_driver = { |
| 76 | .driver = { |
| 77 | .name = "samsung-pd", |
| 78 | .owner = THIS_MODULE, |
| 79 | .pm = &samsung_pd_pm_ops, |
| 80 | }, |
| 81 | .probe = samsung_pd_probe, |
| 82 | .remove = __devexit_p(samsung_pd_remove), |
| 83 | }; |
| 84 | |
| 85 | static int __init samsung_pd_init(void) |
| 86 | { |
| 87 | int ret; |
| 88 | |
| 89 | ret = platform_driver_register(&samsung_pd_driver); |
| 90 | if (ret) |
| 91 | printk(KERN_ERR "%s: failed to add PD driver\n", __func__); |
| 92 | |
| 93 | return ret; |
| 94 | } |
| 95 | arch_initcall(samsung_pd_init); |