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authorPavel Machek <pavel@ucw.cz>2005-04-05 23:49:49 +0200
committerGreg KH <gregkh@suse.de>2005-05-03 23:45:14 -0700
commit92df516e6264f9caff4be49718926d6884fa50ed (patch)
tree1b09131f91db847c9f3d6de98ed5cc1ebd0e9325 /Documentation
parenta3ea7fbac12fdb2d70c90bb36f81afa3c66e18f4 (diff)
[PATCH] PCI: fix stale PCI pm docs
This fixes u32 vs. pm_message_t confusion in documentation, and removes references to no-longer-existing (*save_state), too. With exception of USB (I hope David will fix/apply my patch), this should fix last piece of this confusion... famous last words. Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/power/pci.txt35
1 files changed, 2 insertions, 33 deletions
diff --git a/Documentation/power/pci.txt b/Documentation/power/pci.txt
index c85428e7ad92..35b1a7dae342 100644
--- a/Documentation/power/pci.txt
+++ b/Documentation/power/pci.txt
@@ -165,40 +165,9 @@ Description:
These functions are intended for use by individual drivers, and are defined in
struct pci_driver:
- int (*save_state) (struct pci_dev *dev, u32 state);
- int (*suspend) (struct pci_dev *dev, u32 state);
+ int (*suspend) (struct pci_dev *dev, pm_message_t state);
int (*resume) (struct pci_dev *dev);
- int (*enable_wake) (struct pci_dev *dev, u32 state, int enable);
-
-
-save_state
-----------
-
-Usage:
-
-if (dev->driver && dev->driver->save_state)
- dev->driver->save_state(dev,state);
-
-The driver should use this callback to save device state. It should take into
-account the current state of the device and the requested state in order to
-avoid any unnecessary operations.
-
-For example, a video card that supports all 4 states (D0-D3), all controller
-context is preserved when entering D1, but the screen is placed into a low power
-state (blanked).
-
-The driver can also interpret this function as a notification that it may be
-entering a sleep state in the near future. If it knows that the device cannot
-enter the requested state, either because of lack of support for it, or because
-the device is middle of some critical operation, then it should fail.
-
-This function should not be used to set any state in the device or the driver
-because the device may not actually enter the sleep state (e.g. another driver
-later causes causes a global state transition to fail).
-
-Note that in intermediate low power states, a device's I/O and memory spaces may
-be disabled and may not be available in subsequent transitions to lower power
-states.
+ int (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable);
suspend

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