diff options
Diffstat (limited to 'Documentation/power/pci.txt')
| -rw-r--r-- | Documentation/power/pci.txt | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/Documentation/power/pci.txt b/Documentation/power/pci.txt index e00b099a4b86..dd8fe43888d3 100644 --- a/Documentation/power/pci.txt +++ b/Documentation/power/pci.txt | |||
| @@ -164,7 +164,6 @@ struct pci_driver: | |||
| 164 | 164 | ||
| 165 | int (*suspend) (struct pci_dev *dev, pm_message_t state); | 165 | int (*suspend) (struct pci_dev *dev, pm_message_t state); |
| 166 | int (*resume) (struct pci_dev *dev); | 166 | int (*resume) (struct pci_dev *dev); |
| 167 | int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable); | ||
| 168 | 167 | ||
| 169 | 168 | ||
| 170 | suspend | 169 | suspend |
| @@ -251,42 +250,6 @@ The driver should update the current_state field in its pci_dev structure in | |||
| 251 | this function, except for PM-capable devices when pci_set_power_state is used. | 250 | this function, except for PM-capable devices when pci_set_power_state is used. |
| 252 | 251 | ||
| 253 | 252 | ||
| 254 | enable_wake | ||
| 255 | ----------- | ||
| 256 | |||
| 257 | Usage: | ||
| 258 | |||
| 259 | if (dev->driver && dev->driver->enable_wake) | ||
| 260 | dev->driver->enable_wake(dev,state,enable); | ||
| 261 | |||
| 262 | This callback is generally only relevant for devices that support the PCI PM | ||
| 263 | spec and have the ability to generate a PME# (Power Management Event Signal) | ||
| 264 | to wake the system up. (However, it is possible that a device may support | ||
| 265 | some non-standard way of generating a wake event on sleep.) | ||
| 266 | |||
| 267 | Bits 15:11 of the PMC (Power Mgmt Capabilities) Register in a device's | ||
| 268 | PM Capabilities describe what power states the device supports generating a | ||
| 269 | wake event from: | ||
| 270 | |||
| 271 | +------------------+ | ||
| 272 | | Bit | State | | ||
| 273 | +------------------+ | ||
| 274 | | 11 | D0 | | ||
| 275 | | 12 | D1 | | ||
| 276 | | 13 | D2 | | ||
| 277 | | 14 | D3hot | | ||
| 278 | | 15 | D3cold | | ||
| 279 | +------------------+ | ||
| 280 | |||
| 281 | A device can use this to enable wake events: | ||
| 282 | |||
| 283 | pci_enable_wake(dev,state,enable); | ||
| 284 | |||
| 285 | Note that to enable PME# from D3cold, a value of 4 should be passed to | ||
| 286 | pci_enable_wake (since it uses an index into a bitmask). If a driver gets | ||
| 287 | a request to enable wake events from D3, two calls should be made to | ||
| 288 | pci_enable_wake (one for both D3hot and D3cold). | ||
| 289 | |||
| 290 | 253 | ||
| 291 | A reference implementation | 254 | A reference implementation |
| 292 | ------------------------- | 255 | ------------------------- |
