1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 | /* * drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems * * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc. * * This file is released under the GPLv2. */ #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/export.h> #include <linux/suspend.h> #ifdef [31mCONFIG_PM[0m /** * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems. * @dev: Device to suspend. * * If PM operations are defined for the @dev's driver and they include * ->runtime_suspend(), execute it and return its error code. Otherwise, * return 0. */ int pm_generic_runtime_suspend(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; int ret; ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : 0; return ret; } EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend); /** * pm_generic_runtime_resume - Generic runtime resume callback for subsystems. * @dev: Device to resume. * * If PM operations are defined for the @dev's driver and they include * ->runtime_resume(), execute it and return its error code. Otherwise, * return 0. */ int pm_generic_runtime_resume(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; int ret; ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : 0; return ret; } EXPORT_SYMBOL_GPL(pm_generic_runtime_resume); #endif /* CONFIG_PM */ #ifdef [31mCONFIG_PM_SLEEP[0m /** * pm_generic_prepare - Generic routine preparing a device for power transition. * @dev: Device to prepare. * * Prepare a device for a system-wide power transition. */ int pm_generic_prepare(struct device *dev) { struct device_driver *drv = dev->driver; int ret = 0; if (drv && drv->pm && drv->pm->prepare) ret = drv->pm->prepare(dev); return ret; } /** * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems. * @dev: Device to suspend. */ int pm_generic_suspend_noirq(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq); /** * pm_generic_suspend_late - Generic suspend_late callback for subsystems. * @dev: Device to suspend. */ int pm_generic_suspend_late(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->suspend_late ? pm->suspend_late(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_suspend_late); /** * pm_generic_suspend - Generic suspend callback for subsystems. * @dev: Device to suspend. */ int pm_generic_suspend(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->suspend ? pm->suspend(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_suspend); /** * pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems. * @dev: Device to freeze. */ int pm_generic_freeze_noirq(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq); /** * pm_generic_freeze_late - Generic freeze_late callback for subsystems. * @dev: Device to freeze. */ int pm_generic_freeze_late(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->freeze_late ? pm->freeze_late(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_freeze_late); /** * pm_generic_freeze - Generic freeze callback for subsystems. * @dev: Device to freeze. */ int pm_generic_freeze(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->freeze ? pm->freeze(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_freeze); /** * pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems. * @dev: Device to handle. */ int pm_generic_poweroff_noirq(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq); /** * pm_generic_poweroff_late - Generic poweroff_late callback for subsystems. * @dev: Device to handle. */ int pm_generic_poweroff_late(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_poweroff_late); /** * pm_generic_poweroff - Generic poweroff callback for subsystems. * @dev: Device to handle. */ int pm_generic_poweroff(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->poweroff ? pm->poweroff(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_poweroff); /** * pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems. * @dev: Device to thaw. */ int pm_generic_thaw_noirq(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq); /** * pm_generic_thaw_early - Generic thaw_early callback for subsystems. * @dev: Device to thaw. */ int pm_generic_thaw_early(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->thaw_early ? pm->thaw_early(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_thaw_early); /** * pm_generic_thaw - Generic thaw callback for subsystems. * @dev: Device to thaw. */ int pm_generic_thaw(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->thaw ? pm->thaw(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_thaw); /** * pm_generic_resume_noirq - Generic resume_noirq callback for subsystems. * @dev: Device to resume. */ int pm_generic_resume_noirq(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_resume_noirq); /** * pm_generic_resume_early - Generic resume_early callback for subsystems. * @dev: Device to resume. */ int pm_generic_resume_early(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->resume_early ? pm->resume_early(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_resume_early); /** * pm_generic_resume - Generic resume callback for subsystems. * @dev: Device to resume. */ int pm_generic_resume(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->resume ? pm->resume(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_resume); /** * pm_generic_restore_noirq - Generic restore_noirq callback for subsystems. * @dev: Device to restore. */ int pm_generic_restore_noirq(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_restore_noirq); /** * pm_generic_restore_early - Generic restore_early callback for subsystems. * @dev: Device to resume. */ int pm_generic_restore_early(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->restore_early ? pm->restore_early(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_restore_early); /** * pm_generic_restore - Generic restore callback for subsystems. * @dev: Device to restore. */ int pm_generic_restore(struct device *dev) { const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; return pm && pm->restore ? pm->restore(dev) : 0; } EXPORT_SYMBOL_GPL(pm_generic_restore); /** * pm_generic_complete - Generic routine completing a device power transition. * @dev: Device to handle. * * Complete a device power transition during a system-wide power transition. */ void pm_generic_complete(struct device *dev) { struct device_driver *drv = dev->driver; if (drv && drv->pm && drv->pm->complete) drv->pm->complete(dev); } /** * pm_complete_with_resume_check - Complete a device power transition. * @dev: Device to handle. * * Complete a device power transition during a system-wide power transition and * optionally schedule a runtime resume of the device if the system resume in * progress has been initated by the platform firmware and the device had its * power.direct_complete flag set. */ void pm_complete_with_resume_check(struct device *dev) { pm_generic_complete(dev); /* * If the device had been runtime-suspended before the system went into * the sleep state it is going out of and it has never been resumed till * now, resume it in case the firmware powered it up. */ if (dev->power.direct_complete && pm_resume_via_firmware()) pm_request_resume(dev); } EXPORT_SYMBOL_GPL(pm_complete_with_resume_check); #endif /* CONFIG_PM_SLEEP */ |