Em Wed, 9 Sep 2020 10:35:55 +0200 Greg Kroah-Hartman <gre...@linuxfoundation.org> escreveu:
> On Mon, Sep 07, 2020 at 05:59:32PM +0200, Mauro Carvalho Chehab wrote: > > From: Yu Chen <cheny...@huawei.com> > > > > The HiKey960 has a fairly complex USB configuration due to it > > needing to support a USB-C port for host/device mode and multiple > > USB-A ports in host mode, all using a single USB controller. > > > > See schematics here: > > > > https://github.com/96boards/documentation/raw/master/consumer/hikey/hikey960/hardware-docs/HiKey960_Schematics.pdf > > > > This driver acts as a usb-role-switch intermediary, intercepting > > the role switch notifications from the tcpm code, and passing > > them on to the dwc3 core. > > > > In doing so, it also controls the onboard hub and power gpios in > > order to properly route the data lines between the USB-C port > > and the onboard hub to the USB-A ports. > > > > Signed-off-by: Yu Chen <cheny...@huawei.com> > > [jstultz: Major rework to make the driver a usb-role-switch > > intermediary] > > Signed-off-by: John Stultz <john.stu...@linaro.org> > > Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org> > > --- > > MAINTAINERS | 7 ++ > > drivers/misc/Kconfig | 9 ++ > > drivers/misc/Makefile | 1 + > > drivers/misc/hisi_hikey_usb.c | 205 ++++++++++++++++++++++++++++++++++ > > 4 files changed, 222 insertions(+) > > create mode 100644 drivers/misc/hisi_hikey_usb.c > > Can this, and the next patch, go into my char-misc tree independent of > the other patches in this series? Yes, they can go via char-misc tree. The drivers are independent. > Or do they all need to go in together? For USB functionality to actually work, both drivers are needed. The DTS patch assumes both drivers to be merged. While I don't see any big issue if this getting merged via one of the trees (either together with PHY or with misc), if you prefer, I can split it into two different patches (at the cost of probably causing some trivial conflict when both gets merged upstream). Thanks, Mauro