1/* 2 * drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems 3 * 4 * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc. 5 * 6 * This file is released under the GPLv2. 7 */ 8 9#include <linux/pm.h> 10#include <linux/pm_runtime.h> 11#include <linux/export.h> 12 13#ifdef CONFIG_PM_RUNTIME 14/** 15 * pm_generic_runtime_idle - Generic runtime idle callback for subsystems. 16 * @dev: Device to handle. 17 * 18 * If PM operations are defined for the @dev's driver and they include 19 * ->runtime_idle(), execute it and return its error code, if nonzero. 20 * Otherwise, execute pm_runtime_suspend() for the device and return 0. 21 */ 22int pm_generic_runtime_idle(struct device *dev) 23{ 24 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 25 26 if (pm && pm->runtime_idle) { 27 int ret = pm->runtime_idle(dev); 28 if (ret) 29 return ret; 30 } 31 32 pm_runtime_suspend(dev); 33 return 0; 34} 35EXPORT_SYMBOL_GPL(pm_generic_runtime_idle); 36 37/** 38 * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems. 39 * @dev: Device to suspend. 40 * 41 * If PM operations are defined for the @dev's driver and they include 42 * ->runtime_suspend(), execute it and return its error code. Otherwise, 43 * return 0. 44 */ 45int pm_generic_runtime_suspend(struct device *dev) 46{ 47 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 48 int ret; 49 50 ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : 0; 51 52 return ret; 53} 54EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend); 55 56/** 57 * pm_generic_runtime_resume - Generic runtime resume callback for subsystems. 58 * @dev: Device to resume. 59 * 60 * If PM operations are defined for the @dev's driver and they include 61 * ->runtime_resume(), execute it and return its error code. Otherwise, 62 * return 0. 63 */ 64int pm_generic_runtime_resume(struct device *dev) 65{ 66 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 67 int ret; 68 69 ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : 0; 70 71 return ret; 72} 73EXPORT_SYMBOL_GPL(pm_generic_runtime_resume); 74#endif /* CONFIG_PM_RUNTIME */ 75 76#ifdef CONFIG_PM_SLEEP 77/** 78 * pm_generic_prepare - Generic routine preparing a device for power transition. 79 * @dev: Device to prepare. 80 * 81 * Prepare a device for a system-wide power transition. 82 */ 83int pm_generic_prepare(struct device *dev) 84{ 85 struct device_driver *drv = dev->driver; 86 int ret = 0; 87 88 if (drv && drv->pm && drv->pm->prepare) 89 ret = drv->pm->prepare(dev); 90 91 return ret; 92} 93 94/** 95 * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems. 96 * @dev: Device to suspend. 97 */ 98int pm_generic_suspend_noirq(struct device *dev) 99{ 100 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 101 102 return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0; 103} 104EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq); 105 106/** 107 * pm_generic_suspend_late - Generic suspend_late callback for subsystems. 108 * @dev: Device to suspend. 109 */ 110int pm_generic_suspend_late(struct device *dev) 111{ 112 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 113 114 return pm && pm->suspend_late ? pm->suspend_late(dev) : 0; 115} 116EXPORT_SYMBOL_GPL(pm_generic_suspend_late); 117 118/** 119 * pm_generic_suspend - Generic suspend callback for subsystems. 120 * @dev: Device to suspend. 121 */ 122int pm_generic_suspend(struct device *dev) 123{ 124 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 125 126 return pm && pm->suspend ? pm->suspend(dev) : 0; 127} 128EXPORT_SYMBOL_GPL(pm_generic_suspend); 129 130/** 131 * pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems. 132 * @dev: Device to freeze. 133 */ 134int pm_generic_freeze_noirq(struct device *dev) 135{ 136 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 137 138 return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0; 139} 140EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq); 141 142/** 143 * pm_generic_freeze_late - Generic freeze_late callback for subsystems. 144 * @dev: Device to freeze. 145 */ 146int pm_generic_freeze_late(struct device *dev) 147{ 148 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 149 150 return pm && pm->freeze_late ? pm->freeze_late(dev) : 0; 151} 152EXPORT_SYMBOL_GPL(pm_generic_freeze_late); 153 154/** 155 * pm_generic_freeze - Generic freeze callback for subsystems. 156 * @dev: Device to freeze. 157 */ 158int pm_generic_freeze(struct device *dev) 159{ 160 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 161 162 return pm && pm->freeze ? pm->freeze(dev) : 0; 163} 164EXPORT_SYMBOL_GPL(pm_generic_freeze); 165 166/** 167 * pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems. 168 * @dev: Device to handle. 169 */ 170int pm_generic_poweroff_noirq(struct device *dev) 171{ 172 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 173 174 return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0; 175} 176EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq); 177 178/** 179 * pm_generic_poweroff_late - Generic poweroff_late callback for subsystems. 180 * @dev: Device to handle. 181 */ 182int pm_generic_poweroff_late(struct device *dev) 183{ 184 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 185 186 return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0; 187} 188EXPORT_SYMBOL_GPL(pm_generic_poweroff_late); 189 190/** 191 * pm_generic_poweroff - Generic poweroff callback for subsystems. 192 * @dev: Device to handle. 193 */ 194int pm_generic_poweroff(struct device *dev) 195{ 196 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 197 198 return pm && pm->poweroff ? pm->poweroff(dev) : 0; 199} 200EXPORT_SYMBOL_GPL(pm_generic_poweroff); 201 202/** 203 * pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems. 204 * @dev: Device to thaw. 205 */ 206int pm_generic_thaw_noirq(struct device *dev) 207{ 208 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 209 210 return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0; 211} 212EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq); 213 214/** 215 * pm_generic_thaw_early - Generic thaw_early callback for subsystems. 216 * @dev: Device to thaw. 217 */ 218int pm_generic_thaw_early(struct device *dev) 219{ 220 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 221 222 return pm && pm->thaw_early ? pm->thaw_early(dev) : 0; 223} 224EXPORT_SYMBOL_GPL(pm_generic_thaw_early); 225 226/** 227 * pm_generic_thaw - Generic thaw callback for subsystems. 228 * @dev: Device to thaw. 229 */ 230int pm_generic_thaw(struct device *dev) 231{ 232 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 233 234 return pm && pm->thaw ? pm->thaw(dev) : 0; 235} 236EXPORT_SYMBOL_GPL(pm_generic_thaw); 237 238/** 239 * pm_generic_resume_noirq - Generic resume_noirq callback for subsystems. 240 * @dev: Device to resume. 241 */ 242int pm_generic_resume_noirq(struct device *dev) 243{ 244 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 245 246 return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0; 247} 248EXPORT_SYMBOL_GPL(pm_generic_resume_noirq); 249 250/** 251 * pm_generic_resume_early - Generic resume_early callback for subsystems. 252 * @dev: Device to resume. 253 */ 254int pm_generic_resume_early(struct device *dev) 255{ 256 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 257 258 return pm && pm->resume_early ? pm->resume_early(dev) : 0; 259} 260EXPORT_SYMBOL_GPL(pm_generic_resume_early); 261 262/** 263 * pm_generic_resume - Generic resume callback for subsystems. 264 * @dev: Device to resume. 265 */ 266int pm_generic_resume(struct device *dev) 267{ 268 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 269 270 return pm && pm->resume ? pm->resume(dev) : 0; 271} 272EXPORT_SYMBOL_GPL(pm_generic_resume); 273 274/** 275 * pm_generic_restore_noirq - Generic restore_noirq callback for subsystems. 276 * @dev: Device to restore. 277 */ 278int pm_generic_restore_noirq(struct device *dev) 279{ 280 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 281 282 return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0; 283} 284EXPORT_SYMBOL_GPL(pm_generic_restore_noirq); 285 286/** 287 * pm_generic_restore_early - Generic restore_early callback for subsystems. 288 * @dev: Device to resume. 289 */ 290int pm_generic_restore_early(struct device *dev) 291{ 292 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 293 294 return pm && pm->restore_early ? pm->restore_early(dev) : 0; 295} 296EXPORT_SYMBOL_GPL(pm_generic_restore_early); 297 298/** 299 * pm_generic_restore - Generic restore callback for subsystems. 300 * @dev: Device to restore. 301 */ 302int pm_generic_restore(struct device *dev) 303{ 304 const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; 305 306 return pm && pm->restore ? pm->restore(dev) : 0; 307} 308EXPORT_SYMBOL_GPL(pm_generic_restore); 309 310/** 311 * pm_generic_complete - Generic routine competing a device power transition. 312 * @dev: Device to handle. 313 * 314 * Complete a device power transition during a system-wide power transition. 315 */ 316void pm_generic_complete(struct device *dev) 317{ 318 struct device_driver *drv = dev->driver; 319 320 if (drv && drv->pm && drv->pm->complete) 321 drv->pm->complete(dev); 322 323 /* 324 * Let runtime PM try to suspend devices that haven't been in use before 325 * going into the system-wide sleep state we're resuming from. 326 */ 327 pm_runtime_idle(dev); 328} 329#endif /* CONFIG_PM_SLEEP */ 330