path: root/Documentation
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authorCHENG Renquan <rqcheng@smu.edu.sg>2009-11-22 01:28:52 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 11:55:26 -0800
commit0c7a2b72746a96f999fd2728520d03d94879be69 (patch)
tree30c4d09a7d142c46177ced1c8600a7d7f6bcde25 /Documentation
parent5791e10341f8bf284bd16eb0949cbeed91c9dac8 (diff)
USB: add remove_id sysfs attr for usb drivers
Accroding commit 0994375e, which is adding remove_id sysfs attr for pci drivers, for management tools dynamically bind/unbind a pci/usb devices to a specified drivers; with this patch, the management tools can be simplied. And the original code didn't handle the failure of usb_create_newid_file, fixed in this patch. Signed-off-by: CHENG Renquan <rqcheng@smu.edu.sg> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation')
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb
index 7772928ee48f..deb6b489e4e5 100644
--- a/Documentation/ABI/testing/sysfs-bus-usb
+++ b/Documentation/ABI/testing/sysfs-bus-usb
@@ -144,3 +144,16 @@ Description:
Write a 1 to force the device to disconnect
(equivalent to unplugging a wired USB device).
+What: /sys/bus/usb/drivers/.../remove_id
+Date: November 2009
+Contact: CHENG Renquan <rqcheng@smu.edu.sg>
+ Writing a device ID to this file will remove an ID
+ that was dynamically added via the new_id sysfs entry.
+ The format for the device ID is:
+ idVendor idProduct. After successfully
+ removing an ID, the driver will no longer support the
+ device. This is useful to ensure auto probing won't
+ match the driver to the device. For example:
+ # echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id