diff options
author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-09-27 16:57:05 -0500 |
---|---|---|
committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-10-02 16:04:40 -0500 |
commit | 5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3 (patch) | |
tree | c42b2d3b6b43b5727309317840c136d3ec018846 /net | |
parent | 0e157e52860441cb26051f131dd0b5ae3187a07b (diff) | |
download | linux-stable-5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3.tar.gz linux-stable-5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3.tar.bz2 linux-stable-5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3.zip |
ACPI / property: Allow multiple property compatible _DSD entries
It is possible to have _DSD entries where the data is compatible with
device properties format but are using different GUID for various reasons.
In addition to that there can be many such _DSD entries for a single device
such as for PCIe root port used to host a Thunderbolt hierarchy:
Scope (\_SB.PCI0.RP21)
{
Name (_DSD, Package () {
ToUUID ("6211e2c0-58a3-4af3-90e1-927a4e0c55a4"),
Package () {
Package () {"HotPlugSupportInD3", 1}
},
ToUUID ("efcc06cc-73ac-4bc3-bff0-76143807c389"),
Package () {
Package () {"ExternalFacingPort", 1},
Package () {"UID", 0 }
}
})
}
More information about these new _DSD entries can be found in:
https://docs.microsoft.com/en-us/windows-hardware/drivers/pci/dsd-for-pcie-root-ports
To make these available for drivers via unified device property APIs,
modify ACPI property core so that it supports multiple _DSD entries
organized in a linked list. We also store GUID of each _DSD entry in struct
acpi_device_properties in case there is need to differentiate between
entries. The supported GUIDs are then listed in prp_guids array.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions