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| author | Matthew Garrett <mjg@redhat.com> | 2012-02-03 17:11:54 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-09 08:40:11 -0800 |
| commit | 0846e7e9856c0928223447d9349a877202a63f24 (patch) | |
| tree | 1ef6df58927568478e17396855c579ad45aa9fee /Documentation/ABI/testing | |
| parent | af74d2dae8f85a0e90a30594beb507f5d954fa3f (diff) | |
| download | linux-stable-0846e7e9856c0928223447d9349a877202a63f24.tar.gz linux-stable-0846e7e9856c0928223447d9349a877202a63f24.tar.bz2 linux-stable-0846e7e9856c0928223447d9349a877202a63f24.zip | |
usb: Add support for indicating whether a port is removable
Userspace may want to make policy decisions based on whether or not a
given USB device is removable. Add a per-device member and support
for exposing it in sysfs. Information sources to populate it will be
added later.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI/testing')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb index b4f548792e32..7c22a532fdfb 100644 --- a/Documentation/ABI/testing/sysfs-bus-usb +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -182,3 +182,14 @@ Description: USB2 hardware LPM is enabled for the device. Developer can write y/Y/1 or n/N/0 to the file to enable/disable the feature. + +What: /sys/bus/usb/devices/.../removable +Date: February 2012 +Contact: Matthew Garrett <mjg@redhat.com> +Description: + Some information about whether a given USB device is + physically fixed to the platform can be inferred from a + combination of hub decriptor bits and platform-specific data + such as ACPI. This file will read either "removable" or + "fixed" if the information is available, and "unknown" + otherwise.
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