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| author |   Peter Chen <peter.chen@nxp.com> | 2017-03-27 10:54:27 +0800 |
|---|---|---|
| committer | Peter Chen <peter.chen@nxp.com> | 2017-04-14 09:26:37 +0800 |
| commit | a932a8041ff9941a244619555f1c75ecf299f662 (patch) | |
| tree | 327a92c46c42a92c000557389777540fdad74737 /Documentation/ABI | |
| parent | usb: chipidea: udc: update gadget state after bus resume (diff) | |
| download | linux-dev-a932a8041ff9941a244619555f1c75ecf299f662.tar.xz linux-dev-a932a8041ff9941a244619555f1c75ecf299f662.zip | |
usb: chipidea: core: add sysfs group
Sometimes, the user needs to adjust some properties for controllers, eg
the role for controller, we add sysfs group for them.
The attribute 'role' is used to switch host/gadget role dynamically, the
uewr can read the current role, and write the other role compare to
current one to finish the switch.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform-chipidea-usb2 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-chipidea-usb2 b/Documentation/ABI/testing/sysfs-platform-chipidea-usb2 new file mode 100644 index 000000000000..b0f4684a83fe --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-chipidea-usb2 @@ -0,0 +1,9 @@ +What: /sys/bus/platform/devices/ci_hdrc.0/role +Date: Mar 2017 +Contact: Peter Chen <peter.chen@nxp.com> +Description: + It returns string "gadget" or "host" when read it, it indicates + current controller role. + + It will do role switch when write "gadget" or "host" to it. + Only controller at dual-role configuration supports writing. |