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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2020-03-24 12:09:23 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-03-24 13:38:51 +0100
commita599a0fb629a61ef0c8c47312152866d24faeaff (patch)
tree1b4c6a471994a9641713840e5a7ce0dad396071c /drivers/usb/core
parentfd78901c297ee1a3214f617d4afb83a467aa7ada (diff)
downloadlinux-a599a0fb629a61ef0c8c47312152866d24faeaff.tar.bz2
usb: core: Add ACPI support for USB interface devices
Currently on ACPI-enabled systems the USB interface device has no link to the actual firmware node and thus drivers may not parse additional information given in the table. The new feature, proposed here, allows to pass properties or other information to the drivers. The ACPI companion of the device has to be set for USB interface devices to achieve above. Use ACPI_COMPANION_SET macro to set this. Note, OF already does link of_node and this is the same for ACPI case. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://lore.kernel.org/r/20200324100923.8332-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/message.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 5adf489428aa..d5f834f16993 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -5,6 +5,7 @@
* Released under the GPLv2 only.
*/
+#include <linux/acpi.h>
#include <linux/pci.h> /* for scatterlist macros */
#include <linux/usb.h>
#include <linux/module.h>
@@ -1941,6 +1942,7 @@ free_interfaces:
intf->dev.of_node = usb_of_get_interface_node(dev,
configuration, ifnum);
}
+ ACPI_COMPANION_SET(&intf->dev, ACPI_COMPANION(&dev->dev));
intf->dev.driver = NULL;
intf->dev.bus = &usb_bus_type;
intf->dev.type = &usb_if_device_type;