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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2018-09-27 23:57:05 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2018-10-02 23:04:40 +0200 |
| commit | 5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3 (patch) | |
| tree | c42b2d3b6b43b5727309317840c136d3ec018846 /drivers/gpio | |
| parent | PCI/PME: Implement runtime PM callbacks (diff) | |
| download | linux-5f5e4890d57a8af5da72c9d73a4efa9bad43a7a3.tar.xz linux-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 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib-acpi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 8b9d7e42c600..f74aa0e60300 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -1198,7 +1198,7 @@ int acpi_gpio_count(struct device *dev, const char *con_id) bool acpi_can_fallback_to_crs(struct acpi_device *adev, const char *con_id) { /* Never allow fallback if the device has properties */ - if (adev->data.properties || adev->driver_gpios) + if (acpi_dev_has_props(adev) || adev->driver_gpios) return false; return con_id == NULL; |