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* [PATCH v4 0/3] Add USB role switch support to DWC2
@ 2020-07-27  9:23 Amelie Delaunay
  2020-07-27  9:23 ` [PATCH v4 1/3] dt-bindings: usb: dwc2: add optional usb-role-switch property Amelie Delaunay
                   ` (2 more replies)
  0 siblings, 3 replies; 9+ messages in thread
From: Amelie Delaunay @ 2020-07-27  9:23 UTC (permalink / raw)
  To: Minas Harutyunyan, Felipe Balbi, Greg Kroah-Hartman, Rob Herring,
	Maxime Coquelin, Alexandre Torgue
  Cc: linux-usb, devicetree, linux-kernel, linux-arm-kernel,
	linux-stm32, Fabrice Gasnier, Amelie Delaunay,
	Martin Blumenstingl

When using usb-c connector (but it can also be the case with a micro-b
connector), iddig, avalid, bvalid, vbusvalid input signals may not be
connected to the DWC2 OTG controller.
DWC2 OTG controller features an overriding control of the PHY voltage valid
and ID input signals.
So, missing signals can be forced using usb role from usb role switch and
this override feature.

This series adds support for usb role switch to dwc2, by using overriding
control of the PHY voltage valid and ID input signals.

It has been tested on stm32mp157c-dk2 [1], which has a Type-C connector
managed by a Type-C port controller, and connected to USB OTG controller.

[1] https://www.st.com/en/evaluation-tools/stm32mp157c-dk2.html

Amelie Delaunay (3):
  dt-bindings: usb: dwc2: add optional usb-role-switch property
  usb: dwc2: override PHY input signals with usb role switch support
  usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15
    SoCs
---
Changes in v4:
- Simplify call to dwc2_force_mode in drd.c
- Add error_drd label in probe error path in platform.c
Changes in v3:
- Fix build issue reported by kernel test robot in drd.c
Changes in v2:
- Previous DT patch already in stm32-next branch so removed from v2 patchset
  "ARM: dts: stm32: enable usb-role-switch on USB OTG on stm32mp15xx-dkx"
- DWC2 DT bindings update added
- Build issue reported by kernel test robot fixed
- Martin's comments taken into account
---
 .../devicetree/bindings/usb/dwc2.yaml         |   4 +
 drivers/usb/dwc2/Kconfig                      |   1 +
 drivers/usb/dwc2/Makefile                     |   2 +-
 drivers/usb/dwc2/core.h                       |   9 +
 drivers/usb/dwc2/drd.c                        | 180 ++++++++++++++++++
 drivers/usb/dwc2/gadget.c                     |   2 +-
 drivers/usb/dwc2/params.c                     |   4 +-
 drivers/usb/dwc2/platform.c                   |  20 +-
 8 files changed, 217 insertions(+), 5 deletions(-)
 create mode 100644 drivers/usb/dwc2/drd.c

-- 
2.17.1


^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2020-07-28  7:28 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-27  9:23 [PATCH v4 0/3] Add USB role switch support to DWC2 Amelie Delaunay
2020-07-27  9:23 ` [PATCH v4 1/3] dt-bindings: usb: dwc2: add optional usb-role-switch property Amelie Delaunay
2020-07-27 17:47   ` Martin Blumenstingl
2020-07-27  9:23 ` [PATCH v4 2/3] usb: dwc2: override PHY input signals with usb role switch support Amelie Delaunay
2020-07-27 17:55   ` Martin Blumenstingl
2020-07-27  9:23 ` [PATCH v4 3/3] usb: dwc2: don't use ID/Vbus detection if usb-role-switch on STM32MP15 SoCs Amelie Delaunay
2020-07-27 17:49   ` Martin Blumenstingl
2020-07-27 19:44     ` Andy Shevchenko
2020-07-28  7:27       ` Amelie DELAUNAY

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