return 0;
}
-#ifdef CONFIG_PM_SLEEP
-static int spi_legacy_suspend(struct device *dev, pm_message_t message)
-{
- int value = 0;
- struct spi_driver *drv = to_spi_driver(dev->driver);
-
- /* suspend will stop irqs and dma; no more i/o */
- if (drv) {
- if (drv->suspend)
- value = drv->suspend(to_spi_device(dev), message);
- else
- dev_dbg(dev, "... can't suspend\n");
- }
- return value;
-}
-
-static int spi_legacy_resume(struct device *dev)
-{
- int value = 0;
- struct spi_driver *drv = to_spi_driver(dev->driver);
-
- /* resume may restart the i/o queue */
- if (drv) {
- if (drv->resume)
- value = drv->resume(to_spi_device(dev));
- else
- dev_dbg(dev, "... can't resume\n");
- }
- return value;
-}
-
-static int spi_pm_suspend(struct device *dev)
-{
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
- if (pm)
- return pm_generic_suspend(dev);
- else
- return spi_legacy_suspend(dev, PMSG_SUSPEND);
-}
-
-static int spi_pm_resume(struct device *dev)
-{
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
- if (pm)
- return pm_generic_resume(dev);
- else
- return spi_legacy_resume(dev);
-}
-
-static int spi_pm_freeze(struct device *dev)
-{
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
- if (pm)
- return pm_generic_freeze(dev);
- else
- return spi_legacy_suspend(dev, PMSG_FREEZE);
-}
-
-static int spi_pm_thaw(struct device *dev)
-{
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
- if (pm)
- return pm_generic_thaw(dev);
- else
- return spi_legacy_resume(dev);
-}
-
-static int spi_pm_poweroff(struct device *dev)
-{
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
- if (pm)
- return pm_generic_poweroff(dev);
- else
- return spi_legacy_suspend(dev, PMSG_HIBERNATE);
-}
-
-static int spi_pm_restore(struct device *dev)
-{
- const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL;
-
- if (pm)
- return pm_generic_restore(dev);
- else
- return spi_legacy_resume(dev);
-}
-#else
-#define spi_pm_suspend NULL
-#define spi_pm_resume NULL
-#define spi_pm_freeze NULL
-#define spi_pm_thaw NULL
-#define spi_pm_poweroff NULL
-#define spi_pm_restore NULL
-#endif
-
-static const struct dev_pm_ops spi_pm = {
- .suspend = spi_pm_suspend,
- .resume = spi_pm_resume,
- .freeze = spi_pm_freeze,
- .thaw = spi_pm_thaw,
- .poweroff = spi_pm_poweroff,
- .restore = spi_pm_restore,
- SET_RUNTIME_PM_OPS(
- pm_generic_runtime_suspend,
- pm_generic_runtime_resume,
- NULL
- )
-};
-
struct bus_type spi_bus_type = {
.name = "spi",
.dev_groups = spi_dev_groups,
.match = spi_match_device,
.uevent = spi_uevent,
- .pm = &spi_pm,
};
EXPORT_SYMBOL_GPL(spi_bus_type);
* @remove: Unbinds this driver from the spi device
* @shutdown: Standard shutdown callback used during system state
* transitions such as powerdown/halt and kexec
- * @suspend: Standard suspend callback used during system state transitions
- * @resume: Standard resume callback used during system state transitions
* @driver: SPI device drivers should initialize the name and owner
* field of this structure.
*
int (*probe)(struct spi_device *spi);
int (*remove)(struct spi_device *spi);
void (*shutdown)(struct spi_device *spi);
- int (*suspend)(struct spi_device *spi, pm_message_t mesg);
- int (*resume)(struct spi_device *spi);
struct device_driver driver;
};