Messages in this thread | | | From | John Stultz <> | Subject | [RFC][PATCH 0/3] Try to connect hikey's usb phy to dwc2 driver | Date | Tue, 22 Nov 2016 19:46:46 -0800 |
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After earlier attempts[1] at submitting somewhat hackish fixes to the dwc2 driver, I realized the core issue seemed to be the overly simplistic phy driver.
I've connected the phy-hi6220-usb.c driver to extcon so it now gets connection and disconnection signals on the usb gadget cable. And I modified the driver so it registers a usb-phy and calls usb_gadget_vbus_connect/disconnect() appropriately.
Unfortunately this doesn't quite work with the dwc2 driver, so I've hacked that driver to allow it to function.
With these changes, while likely not correct, things function well, and I was able to drop two of the hackish fixups from the earlier set. I still needed one patch to keep the usb bus from suspending while in gadget mode, so I've included that in this series.
[1]: http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1272880.html
Feedback and guidance would be greatly appreciated!
thanks -john
Cc: Wei Xu <xuwei5@hisilicon.com> Cc: Guodong Xu <guodong.xu@linaro.org> Cc: Amit Pundir <amit.pundir@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: John Youn <johnyoun@synopsys.com> Cc: Douglas Anderson <dianders@chromium.org> Cc: Chen Yu <chenyu56@huawei.com> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: linux-usb@vger.kernel.org
John Stultz (3): phy: phy-hi6220-usb: Wire up extconn support to hikey's phy driver HACK: dwc2: force dual use of uphy and phy usb: dwc2: Avoid suspending if we're in gadget mode
arch/arm64/boot/dts/hisilicon/hi6220.dtsi | 11 +++ drivers/phy/Kconfig | 2 + drivers/phy/phy-hi6220-usb.c | 139 ++++++++++++++++++++++++++++++ drivers/usb/dwc2/hcd.c | 3 + drivers/usb/dwc2/platform.c | 4 +- 5 files changed, 157 insertions(+), 2 deletions(-)
-- 2.7.4
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