Hi, The idea for these comes from Benson. By letting the typec drivers know what exactly was enumerated, they can power off everything that's not needed. The USB device and USB Type-C partner device will also be linked together with symlinks in sysfs. If I uderstood correctly, you guys (from ChromiumOS team) have already user for that. Let me know if I got that wrong. The original RFC: https://lore.kernel.org/linux-usb/ZPCGnL4zgAKh1mGA@xxxxxxxxxxxxxxxxx/T/ thanks, Heikki Krogerus (2): usb: typec: Link enumerated USB devices with Type-C partner usb: Inform the USB Type-C class about enumerated devices Documentation/ABI/testing/sysfs-bus-usb | 9 ++ drivers/usb/core/hub.c | 4 + drivers/usb/core/hub.h | 3 + drivers/usb/core/port.c | 19 ++++- drivers/usb/typec/class.c | 108 ++++++++++++++++++++++-- drivers/usb/typec/class.h | 16 ++++ drivers/usb/typec/port-mapper.c | 9 +- include/linux/usb/typec.h | 37 ++++++++ 8 files changed, 193 insertions(+), 12 deletions(-) -- 2.40.1
