Hi, This is version 9 of Hans' an my series introducing support for USB muxes, and generic device connection handling. The last version have been mostly about getting the first patch introducing the device connection handling right. Check vesion 8 from here: https://lkml.org/lkml/2018/3/14/428 Here is the original cover-letter of v1: Some devices with an USB Type-C connector have a bunch of muxes behind that connector which need to be controlled by the kernel (rather then having them controlled by firmware as on most devices). Quite a while back I submitted a patch-series to tie together these muxes and the Type-C Port Manager (tcpm) code, using the then new drivers/mux framework. But the way I used the mux framework went against what it was designed for, so in the end that series got nowhere. Heikki Krogerus from Intel, who maintains the USB TYPEC subsystem, has recently been working on solving the same problem for some boards he is doing hardware-enablement for. Heikki has come up with a number of infrastructure patches for this. The first one is a new device-connection framework. This solves the problem of describing non bus device-links on x86 in what in my experience with this problematic area is a really nice simple, clean and *generic* way. This could for example in the near future also replace the custom lookup code in the pwm subsys and the custom pwm_add_table() / pwm_remove_table() functions. The other 3 patches add a framework for the different type of Type-C / USB "muxes". Heikki and I have gone through a number of iterations of these patches together and we believe these are now ready for merging. Since merging infrastructure patches without users is not done and Heikki's own use-case for these is not yet ready for merging, the rest of this series consists of patches by me to make the Type-C connector found on some Cherry Trail devices (finally) be able to actually work as an USB port and not just a charge port. The last patch uses the new usb-role-switch framework to also do proper devcie / host switching on CHT devices with a USB micro AB connector. This is also a big feature for CHT users, because before this they had to do a reboot to get an OTG-host cable recognized (on some devices). Part of this series is an usb-role-switch driver for the role-switch found inside the xhci controller on e.g. CHT devices, this is currently implemented as the generic xhci controller instantiating a platform child-device for this, since this really is a separate chunk of HW which happens to sit in the XHCI mmio space. This approach may not be universally liked, given that in this new series the role-switch driver is much smaller and does not have any external deps anymore we could just integrate it into the xhci code if that is preferred. About merging this series (once everything is reviewed, etc.), there are quite some interdependencies in it esp. a lot of the patches depend on the first patch. Luckily patches 1-10 all apply to subsystems which are maintained by Greg (most to the USB subsys). Which just leaves patches 11 and 12 once 1-10 are merged. Greg, can you create an immutable branch for the platform/x86 and extcon maintainers to merge once this is done? Regards, Hans Hans de Goede (7): usb: typec: tcpm: Set USB role switch to device mode when configured as such usb: typec: tcpm: Use new Type-C switch/mux and usb-role-switch functions xhci: Add Intel extended cap / otg phy mux handling usb: roles: Add Intel xHCI USB role switch driver usb: typec: driver for Pericom PI3USB30532 Type-C cross switch platform/x86: intel_cht_int33fe: Add device connections for the Type-C port extcon: axp288: Set USB role where necessary Heikki Krogerus (4): drivers: base: Unified device connection lookup usb: typec: API for controlling USB Type-C Multiplexers usb: common: Small class for USB role switches usb: typec: Separate the definitions for data and power roles Mathias Nyman (1): xhci: Add option to get next extended capability in list by passing id = 0 Documentation/ABI/testing/sysfs-class-usb_role | 21 ++ Documentation/driver-api/device_connection.rst | 43 ++++ Documentation/driver-api/usb/typec.rst | 73 +++++- MAINTAINERS | 12 + drivers/base/Makefile | 3 +- drivers/base/devcon.c | 136 +++++++++++ drivers/extcon/Kconfig | 3 +- drivers/extcon/extcon-axp288.c | 176 +++++++++++++- drivers/platform/x86/intel_cht_int33fe.c | 24 ++ drivers/usb/Kconfig | 5 + drivers/usb/Makefile | 2 + drivers/usb/common/Makefile | 1 + drivers/usb/common/roles.c | 305 +++++++++++++++++++++++++ drivers/usb/host/Makefile | 2 +- drivers/usb/host/xhci-ext-caps.c | 90 ++++++++ drivers/usb/host/xhci-ext-caps.h | 7 +- drivers/usb/host/xhci-pci.c | 5 + drivers/usb/host/xhci.h | 2 + drivers/usb/roles/Kconfig | 14 ++ drivers/usb/roles/Makefile | 1 + drivers/usb/roles/intel-xhci-usb-role-switch.c | 192 ++++++++++++++++ drivers/usb/typec/Kconfig | 3 + drivers/usb/typec/Makefile | 2 + drivers/usb/typec/{typec.c => class.c} | 124 ++++++++-- drivers/usb/typec/fusb302/fusb302.c | 2 +- drivers/usb/typec/mux.c | 191 ++++++++++++++++ drivers/usb/typec/mux/Kconfig | 10 + drivers/usb/typec/mux/Makefile | 3 + drivers/usb/typec/mux/pi3usb30532.c | 178 +++++++++++++++ drivers/usb/typec/tcpm.c | 63 +++-- drivers/usb/typec/tps6598x.c | 26 ++- drivers/usb/typec/typec_wcove.c | 1 + drivers/usb/typec/ucsi/ucsi.c | 13 +- include/linux/device.h | 22 ++ include/linux/usb/role.h | 53 +++++ include/linux/usb/tcpm.h | 15 +- include/linux/usb/typec.h | 28 ++- include/linux/usb/typec_mux.h | 55 +++++ 38 files changed, 1812 insertions(+), 94 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-class-usb_role create mode 100644 Documentation/driver-api/device_connection.rst create mode 100644 drivers/base/devcon.c create mode 100644 drivers/usb/common/roles.c create mode 100644 drivers/usb/host/xhci-ext-caps.c create mode 100644 drivers/usb/roles/Kconfig create mode 100644 drivers/usb/roles/Makefile create mode 100644 drivers/usb/roles/intel-xhci-usb-role-switch.c rename drivers/usb/typec/{typec.c => class.c} (93%) create mode 100644 drivers/usb/typec/mux.c create mode 100644 drivers/usb/typec/mux/Kconfig create mode 100644 drivers/usb/typec/mux/Makefile create mode 100644 drivers/usb/typec/mux/pi3usb30532.c create mode 100644 include/linux/usb/role.h create mode 100644 include/linux/usb/typec_mux.h -- 2.16.2
