diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-02 08:47:35 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-02 08:47:35 +0100 |
commit | 48a3d90adafc9ed92d19c93d011f17ec9001cc34 (patch) | |
tree | 868f62da2306ddabd6eca57eb6ea2a18ac18995f /Documentation/ABI/testing/sysfs-bus-usb | |
parent | 3f7566f4947834db9b36aeb8b308e91448ba74fc (diff) | |
parent | 3cea11cd5e3b00d91caf0b4730194039b45c5891 (diff) |
Merge 5.10-rc2 into char-misc-next
We need the fixes/changes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-usb')
-rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index 614d216dff1d..bf2c1968525f 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -9,6 +9,7 @@ Description: by writing INTERFACE to /sys/bus/usb/drivers_probe This allows to avoid side-effects with drivers that need multiple interfaces. + A deauthorized interface cannot be probed or claimed. What: /sys/bus/usb/devices/usbX/interface_authorized_default @@ -72,24 +73,27 @@ Description: table at compile time. The format for the device ID is: idVendor idProduct bInterfaceClass RefIdVendor RefIdProduct The vendor ID and device ID fields are required, the - rest is optional. The Ref* tuple can be used to tell the + rest is optional. The `Ref*` tuple can be used to tell the driver to use the same driver_data for the new device as it is used for the reference device. Upon successfully adding an ID, the driver will probe - for the device and attempt to bind to it. For example: - # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id + for the device and attempt to bind to it. For example:: + + # echo "8086 10f5" > /sys/bus/usb/drivers/foo/new_id Here add a new device (0458:7045) using driver_data from - an already supported device (0458:704c): - # echo "0458 7045 0 0458 704c" > /sys/bus/usb/drivers/foo/new_id + an already supported device (0458:704c):: + + # echo "0458 7045 0 0458 704c" > /sys/bus/usb/drivers/foo/new_id Reading from this file will list all dynamically added device IDs in the same format, with one entry per - line. For example: - # cat /sys/bus/usb/drivers/foo/new_id - 8086 10f5 - dead beef 06 - f00d cafe + line. For example:: + + # cat /sys/bus/usb/drivers/foo/new_id + 8086 10f5 + dead beef 06 + f00d cafe The list will be truncated at PAGE_SIZE bytes due to sysfs restrictions. @@ -209,9 +213,11 @@ Description: advance, and behaves well according to the specification. This attribute is a bit-field that controls the behavior of a specific port: + - Bit 0 of this field selects the "old" enumeration scheme, as it is considerably faster (it only causes one USB reset instead of 2). + The old enumeration scheme can also be selected globally using /sys/module/usbcore/parameters/old_scheme_first, but it is often not desirable as the new scheme was introduced to @@ -233,10 +239,10 @@ Description: poll() for monitoring changes to this value in user space. Any time this value changes the corresponding hub device will send a - udev event with the following attributes: + udev event with the following attributes:: - OVER_CURRENT_PORT=/sys/bus/usb/devices/.../(hub interface)/portX - OVER_CURRENT_COUNT=[current value of this sysfs attribute] + OVER_CURRENT_PORT=/sys/bus/usb/devices/.../(hub interface)/portX + OVER_CURRENT_COUNT=[current value of this sysfs attribute] What: /sys/bus/usb/devices/.../(hub interface)/portX/usb3_lpm_permit Date: November 2015 |