pnp: add a shutdown method to pnp drivers

The shutdown method is used by the winbond cir driver to setup the
hardware for wake-from-S5.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: David Härdeman <david@hardeman.nu>
Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 11 insertions, 0 deletions

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index 527ee764c93f..cd11b113494f 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -135,6 +135,15 @@ static int pnp_device_remove(struct device *dev)
         return 0;
 }
 
+static void pnp_device_shutdown(struct device *dev)
+{
+        struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+        struct pnp_driver *drv = pnp_dev->driver;
+
+        if (drv && drv->shutdown)
+                drv->shutdown(pnp_dev);
+}
+
 static int pnp_bus_match(struct device *dev, struct device_driver *drv)
 {
         struct pnp_dev *pnp_dev = to_pnp_dev(dev);
@@ -203,6 +212,7 @@ struct bus_type pnp_bus_type = {
         .match   = pnp_bus_match,
         .probe   = pnp_device_probe,
         .remove  = pnp_device_remove,
+        .shutdown = pnp_device_shutdown,
         .suspend = pnp_bus_suspend,
         .resume  = pnp_bus_resume,
         .dev_attrs = pnp_interface_attrs,
diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index b063c7328ba5..fddfafaed024 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -360,6 +360,7 @@ struct pnp_driver {
         unsigned int flags;
         int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id);
         void (*remove) (struct pnp_dev *dev);
+        void (*shutdown) (struct pnp_dev *dev);
         int (*suspend) (struct pnp_dev *dev, pm_message_t state);
         int (*resume) (struct pnp_dev *dev);
         struct device_driver driver;