A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

PM: Introduce PM_EVENT_HIBERNATE callback state

Browse source 
During the last step of hibernation in the "platform" mode (with the
help of ACPI) we use the suspend code, including the devices'
->suspend() methods, to prepare the system for entering the ACPI S4
system sleep state.

But at least for some devices the operations performed by the
->suspend() callback in that case must be different from its operations
during regular suspend.

For this reason, introduce the new PM event type PM_EVENT_HIBERNATE and
pass it to the device drivers' ->suspend() methods during the last phase
of hibernation, so that they can distinguish this case and handle it as
appropriate.  Modify the drivers that handle PM_EVENT_SUSPEND in a
special way and need to handle PM_EVENT_HIBERNATE in the same way.

These changes are necessary to fix a hibernation regression related
to the i915 driver (ref. http://lkml.org/lkml/2008/2/22/488).

Signed-off-by: Rafael J. Wysocki <[email protected]>
Acked-by: Pavel Machek <[email protected]>
Tested-by: Jeff Chua <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Rafael J. Wysocki 2008-02-23 19:13:25 +01:00 • committed by Linus Torvalds
commit 3a2d5b7001
18 changed files with 42 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/usb/host/sl811-hcd.c
View file

@ -1766,6 +1766,7 @@ sl811h_suspend(struct platform_device *dev, pm_message_t state)
retval = sl811h_bus_suspend(hcd);
break;
case PM_EVENT_SUSPEND:
case PM_EVENT_HIBERNATE:
case PM_EVENT_PRETHAW: /* explicitly discard hw state */
port_power(sl811, 0);
break;

11
drivers/usb/host/u132-hcd.c
View file

@ -3214,14 +3214,19 @@ static int u132_suspend(struct platform_device *pdev, pm_message_t state)
return -ESHUTDOWN;
} else {
int retval = 0;
if (state.event == PM_EVENT_FREEZE) {
switch (state.event) {
case PM_EVENT_FREEZE:
retval = u132_bus_suspend(hcd);
} else if (state.event == PM_EVENT_SUSPEND) {
break;
case PM_EVENT_SUSPEND:
case PM_EVENT_HIBERNATE:
int ports = MAX_U132_PORTS;
while (ports-- > 0) {
port_power(u132, ports, 0);
}
}
break;
}
if (retval == 0)
pdev->dev.power.power_state = state;
return retval;