diff options
| author | Łukasz Bartosik <ukaszb@chromium.org> | 2026-01-20 20:11:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-23 17:16:24 +0100 |
| commit | 33d15312e35d4cfd26b68ab4c1b0143cc43d8b16 (patch) | |
| tree | 00b0c4fcd8288252b3f697a07c76b522dcce5fa7 /Documentation | |
| parent | 412de639b55fcf1ab5ad50a6be84f5164104abe3 (diff) | |
xhci: dbc: allow setting product string through sysfs
Add dbc_product sysfs attribute to allow changing the product description
presented by the debug device when a host requests a string descriptor
with iProduct index.
Value can only be changed while debug capability (DbC) is in disabled
state to prevent USB device descriptor change while connected to a USB
host.
The default value is "Linux USB Debug Target".
The field length can be from 1 to 126 characters.
String is terminated at null or newline, driver does not support empty
string.
[ mn: Improve commit message and sysfs entry documentation ]
Signed-off-by: Łukasz Bartosik <ukaszb@chromium.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://patch.msgid.link/20260120181148.128712-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci-drivers-xhci_hcd | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci-drivers-xhci_hcd b/Documentation/ABI/testing/sysfs-bus-pci-drivers-xhci_hcd index b0e8ded09c16..d153162d6045 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci-drivers-xhci_hcd +++ b/Documentation/ABI/testing/sysfs-bus-pci-drivers-xhci_hcd @@ -100,3 +100,17 @@ Description: connected to a USB host. The default value is "0001". The field length can be from 1 to 126 characters. + +What: /sys/bus/pci/drivers/xhci_hcd/.../dbc_product +Date: January 2026 +Contact: Łukasz Bartosik <ukaszb@chromium.org> +Description: + The dbc_product attribute allows to change the product string + descriptor presented by the debug device when a host requests + a string descriptor with iProduct index. + Index is found in the iProduct field in the device descriptor. + Value can only be changed while debug capability (DbC) is in + disabled state to prevent USB device descriptor change while + connected to a USB host. + The default value is "Linux USB Debug Target". + The field length can be from 1 to 126 characters. |