On Wed, Mar 14, 2018 at 10:51:09AM +0100, Richard Leitner wrote: > From: Richard Leitner <richard.leitner@xxxxxxxxxxx> > > For some userspace applications information on the number of > over-current conditions at specific USB hub ports is relevant. > > In our case we have a series of USB hardware (using the cp210x driver) > which communicates using a proprietary protocol. These devices sometimes > trigger an over-current situation on some hubs. In case of such an > over-current situation the USB devices offer an interface for reducing > the max used power. As these conditions are quite rare and imply > performance reductions of the device we don't want to reduce the max > power always. > > Therefore give user-space applications the possibility to react > adequately by introducing an over_current_counter in the usb port struct > which is exported via sysfs. > > Signed-off-by: Richard Leitner <richard.leitner@xxxxxxxxxxx> > --- > Documentation/ABI/testing/sysfs-bus-usb | 10 ++++++++++ > drivers/usb/core/hub.c | 4 +++- > drivers/usb/core/hub.h | 1 + > drivers/usb/core/port.c | 10 ++++++++++ > 4 files changed, 24 insertions(+), 1 deletion(-) What changed from the previous versions? Always include that below the --- line so we have an idea of what is going on here. v4? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
