drivers/base/power/generic_ops.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * drivers/base/power/generic_ops.c - Generic PM callbacks for subsystems
   4  *
   5  * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
   6  */
   7 #include <linux/pm.h>
   8 #include <linux/pm_runtime.h>
   9 #include <linux/export.h>
  10
  11 #ifdef CONFIG_PM
  12 /**
  13  * pm_generic_runtime_suspend - Generic runtime suspend callback for subsystems.
  14  * @dev: Device to suspend.
  15  *
  16  * If PM operations are defined for the @dev's driver and they include
  17  * ->runtime_suspend(), execute it and return its error code.  Otherwise,
  18  * return 0.
  19  */
  20 int pm_generic_runtime_suspend(struct device *dev)
  21 {
  22         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
  23         int ret;
  24
  25         ret = pm && pm->runtime_suspend ? pm->runtime_suspend(dev) : 0;
  26
  27         return ret;
  28 }
  29 EXPORT_SYMBOL_GPL(pm_generic_runtime_suspend);
  30
  31 /**
  32  * pm_generic_runtime_resume - Generic runtime resume callback for subsystems.
  33  * @dev: Device to resume.
  34  *
  35  * If PM operations are defined for the @dev's driver and they include
  36  * ->runtime_resume(), execute it and return its error code.  Otherwise,
  37  * return 0.
  38  */
  39 int pm_generic_runtime_resume(struct device *dev)
  40 {
  41         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
  42         int ret;
  43
  44         ret = pm && pm->runtime_resume ? pm->runtime_resume(dev) : 0;
  45
  46         return ret;
  47 }
  48 EXPORT_SYMBOL_GPL(pm_generic_runtime_resume);
  49 #endif /* CONFIG_PM */
  50
  51 #ifdef CONFIG_PM_SLEEP
  52 /**
  53  * pm_generic_prepare - Generic routine preparing a device for power transition.
  54  * @dev: Device to prepare.
  55  *
  56  * Prepare a device for a system-wide power transition.
  57  */
  58 int pm_generic_prepare(struct device *dev)
  59 {
  60         struct device_driver *drv = dev->driver;
  61         int ret = 0;
  62
  63         if (drv && drv->pm && drv->pm->prepare)
  64                 ret = drv->pm->prepare(dev);
  65
  66         return ret;
  67 }
  68
  69 /**
  70  * pm_generic_suspend_noirq - Generic suspend_noirq callback for subsystems.
  71  * @dev: Device to suspend.
  72  */
  73 int pm_generic_suspend_noirq(struct device *dev)
  74 {
  75         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
  76
  77         return pm && pm->suspend_noirq ? pm->suspend_noirq(dev) : 0;
  78 }
  79 EXPORT_SYMBOL_GPL(pm_generic_suspend_noirq);
  80
  81 /**
  82  * pm_generic_suspend_late - Generic suspend_late callback for subsystems.
  83  * @dev: Device to suspend.
  84  */
  85 int pm_generic_suspend_late(struct device *dev)
  86 {
  87         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
  88
  89         return pm && pm->suspend_late ? pm->suspend_late(dev) : 0;
  90 }
  91 EXPORT_SYMBOL_GPL(pm_generic_suspend_late);
  92
  93 /**
  94  * pm_generic_suspend - Generic suspend callback for subsystems.
  95  * @dev: Device to suspend.
  96  */
  97 int pm_generic_suspend(struct device *dev)
  98 {
  99         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 100
 101         return pm && pm->suspend ? pm->suspend(dev) : 0;
 102 }
 103 EXPORT_SYMBOL_GPL(pm_generic_suspend);
 104
 105 /**
 106  * pm_generic_freeze_noirq - Generic freeze_noirq callback for subsystems.
 107  * @dev: Device to freeze.
 108  */
 109 int pm_generic_freeze_noirq(struct device *dev)
 110 {
 111         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 112
 113         return pm && pm->freeze_noirq ? pm->freeze_noirq(dev) : 0;
 114 }
 115 EXPORT_SYMBOL_GPL(pm_generic_freeze_noirq);
 116
 117 /**
 118  * pm_generic_freeze_late - Generic freeze_late callback for subsystems.
 119  * @dev: Device to freeze.
 120  */
 121 int pm_generic_freeze_late(struct device *dev)
 122 {
 123         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 124
 125         return pm && pm->freeze_late ? pm->freeze_late(dev) : 0;
 126 }
 127 EXPORT_SYMBOL_GPL(pm_generic_freeze_late);
 128
 129 /**
 130  * pm_generic_freeze - Generic freeze callback for subsystems.
 131  * @dev: Device to freeze.
 132  */
 133 int pm_generic_freeze(struct device *dev)
 134 {
 135         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 136
 137         return pm && pm->freeze ? pm->freeze(dev) : 0;
 138 }
 139 EXPORT_SYMBOL_GPL(pm_generic_freeze);
 140
 141 /**
 142  * pm_generic_poweroff_noirq - Generic poweroff_noirq callback for subsystems.
 143  * @dev: Device to handle.
 144  */
 145 int pm_generic_poweroff_noirq(struct device *dev)
 146 {
 147         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 148
 149         return pm && pm->poweroff_noirq ? pm->poweroff_noirq(dev) : 0;
 150 }
 151 EXPORT_SYMBOL_GPL(pm_generic_poweroff_noirq);
 152
 153 /**
 154  * pm_generic_poweroff_late - Generic poweroff_late callback for subsystems.
 155  * @dev: Device to handle.
 156  */
 157 int pm_generic_poweroff_late(struct device *dev)
 158 {
 159         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 160
 161         return pm && pm->poweroff_late ? pm->poweroff_late(dev) : 0;
 162 }
 163 EXPORT_SYMBOL_GPL(pm_generic_poweroff_late);
 164
 165 /**
 166  * pm_generic_poweroff - Generic poweroff callback for subsystems.
 167  * @dev: Device to handle.
 168  */
 169 int pm_generic_poweroff(struct device *dev)
 170 {
 171         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 172
 173         return pm && pm->poweroff ? pm->poweroff(dev) : 0;
 174 }
 175 EXPORT_SYMBOL_GPL(pm_generic_poweroff);
 176
 177 /**
 178  * pm_generic_thaw_noirq - Generic thaw_noirq callback for subsystems.
 179  * @dev: Device to thaw.
 180  */
 181 int pm_generic_thaw_noirq(struct device *dev)
 182 {
 183         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 184
 185         return pm && pm->thaw_noirq ? pm->thaw_noirq(dev) : 0;
 186 }
 187 EXPORT_SYMBOL_GPL(pm_generic_thaw_noirq);
 188
 189 /**
 190  * pm_generic_thaw_early - Generic thaw_early callback for subsystems.
 191  * @dev: Device to thaw.
 192  */
 193 int pm_generic_thaw_early(struct device *dev)
 194 {
 195         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 196
 197         return pm && pm->thaw_early ? pm->thaw_early(dev) : 0;
 198 }
 199 EXPORT_SYMBOL_GPL(pm_generic_thaw_early);
 200
 201 /**
 202  * pm_generic_thaw - Generic thaw callback for subsystems.
 203  * @dev: Device to thaw.
 204  */
 205 int pm_generic_thaw(struct device *dev)
 206 {
 207         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 208
 209         return pm && pm->thaw ? pm->thaw(dev) : 0;
 210 }
 211 EXPORT_SYMBOL_GPL(pm_generic_thaw);
 212
 213 /**
 214  * pm_generic_resume_noirq - Generic resume_noirq callback for subsystems.
 215  * @dev: Device to resume.
 216  */
 217 int pm_generic_resume_noirq(struct device *dev)
 218 {
 219         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 220
 221         return pm && pm->resume_noirq ? pm->resume_noirq(dev) : 0;
 222 }
 223 EXPORT_SYMBOL_GPL(pm_generic_resume_noirq);
 224
 225 /**
 226  * pm_generic_resume_early - Generic resume_early callback for subsystems.
 227  * @dev: Device to resume.
 228  */
 229 int pm_generic_resume_early(struct device *dev)
 230 {
 231         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 232
 233         return pm && pm->resume_early ? pm->resume_early(dev) : 0;
 234 }
 235 EXPORT_SYMBOL_GPL(pm_generic_resume_early);
 236
 237 /**
 238  * pm_generic_resume - Generic resume callback for subsystems.
 239  * @dev: Device to resume.
 240  */
 241 int pm_generic_resume(struct device *dev)
 242 {
 243         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 244
 245         return pm && pm->resume ? pm->resume(dev) : 0;
 246 }
 247 EXPORT_SYMBOL_GPL(pm_generic_resume);
 248
 249 /**
 250  * pm_generic_restore_noirq - Generic restore_noirq callback for subsystems.
 251  * @dev: Device to restore.
 252  */
 253 int pm_generic_restore_noirq(struct device *dev)
 254 {
 255         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 256
 257         return pm && pm->restore_noirq ? pm->restore_noirq(dev) : 0;
 258 }
 259 EXPORT_SYMBOL_GPL(pm_generic_restore_noirq);
 260
 261 /**
 262  * pm_generic_restore_early - Generic restore_early callback for subsystems.
 263  * @dev: Device to resume.
 264  */
 265 int pm_generic_restore_early(struct device *dev)
 266 {
 267         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 268
 269         return pm && pm->restore_early ? pm->restore_early(dev) : 0;
 270 }
 271 EXPORT_SYMBOL_GPL(pm_generic_restore_early);
 272
 273 /**
 274  * pm_generic_restore - Generic restore callback for subsystems.
 275  * @dev: Device to restore.
 276  */
 277 int pm_generic_restore(struct device *dev)
 278 {
 279         const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
 280
 281         return pm && pm->restore ? pm->restore(dev) : 0;
 282 }
 283 EXPORT_SYMBOL_GPL(pm_generic_restore);
 284
 285 /**
 286  * pm_generic_complete - Generic routine completing a device power transition.
 287  * @dev: Device to handle.
 288  *
 289  * Complete a device power transition during a system-wide power transition.
 290  */
 291 void pm_generic_complete(struct device *dev)
 292 {
 293         struct device_driver *drv = dev->driver;
 294
 295         if (drv && drv->pm && drv->pm->complete)
 296                 drv->pm->complete(dev);
 297 }
 298 #endif /* CONFIG_PM_SLEEP */