diff options
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man9/pci.9 | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/share/man/man9/pci.9 b/share/man/man9/pci.9 index 16cca62..37a4f9a 100644 --- a/share/man/man9/pci.9 +++ b/share/man/man9/pci.9 @@ -145,13 +145,13 @@ the configuration space. .Pp The .Fn pci_get_powerstate -function returns the current ACPI power state of the device +function returns the current power state of the device .Fa dev . If the device does not support power management capabilities, then the default state of .Dv PCI_POWERSTATE_D0 is returned. -The following power states are defined by ACPI: +The following power states are defined by PCI: .Bl -hang -width ".Dv PCI_POWERSTATE_UNKNOWN" .It Dv PCI_POWERSTATE_D0 State in which device is on and running. @@ -183,15 +183,13 @@ The .Fn pci_set_powerstate function is used to transition the device .Fa dev -to the ACPI power state +to the PCI power state .Fa state . -It checks to see if the device is PCI 2.2 compliant. -If so, it checks the -capabilities pointer to determine which power states the device supports. -If the device does not have power management capabilities, the default state -of -.Dv PCI_POWERSTATE_D0 -is set. +If the device does not support power management capabilities or +it does not support the specific power state +.Fa state , +then the function will fail with +.Er EOPNOTSUPP . .Pp The .Fn pci_save_state |
