[PATCH 0/4] usb: dwc3: Add dual-role support using OTG core

[Roger Quadros <rogerq@ti.com>]

Hi Felipe,

Some platforms (e.g. TI's AM437x) don't have USB ID pin state available
over GPIO/extcon but need to rely on the DWC3 core's OTG block to
get the ID pin state instead.

This series implements simple dual-role functionality using DWC3's OTG block.
Debugfs 'mode' override is also functional so user can switch
between "otg", "host" or "device" modes for debug.

Although system suspend/resume isn't working yet in mainline for AM437x,
I've tested this series for system suspend/resume using a local tree.

This series depends on [1] and [2]

[1] https://www.mail-archive.com/linux-usb@vger.kernel.org/msg98771.html

[2] https://www.mail-archive.com/linux-usb@vger.kernel.org/msg98848.html

Roger Quadros (4):
  usb: dwc3: prevent setting PRTCAP to OTG from debugfs
  usb: dwc3: core.h: add some register definitions
  usb: dwc3: add dual role support using OTG block
  ARM: dts: am43xx: Enable dual-role mode for USB1

 arch/arm/boot/dts/am437x-gp-evm.dts  |   2 +-
 arch/arm/boot/dts/am437x-sk-evm.dts  |   2 +-
 arch/arm/boot/dts/am43x-epos-evm.dts |   2 +-
 drivers/usb/dwc3/core.c              |  70 ++++-
 drivers/usb/dwc3/core.h              | 111 ++++++++
 drivers/usb/dwc3/drd.c               | 492 +++++++++++++++++++++++++++++++++--
 6 files changed, 650 insertions(+), 29 deletions(-)

-- 
cheers,
-roger

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki