[PATCH v4 0/2] Add Embedded USB Debugger (EUD) driver

Avaneesh Kumar Dwivedi
2020-01-31T04:43:50Z

This is a series of patches that implements a driver for the control
peripheral, EUD (Embedded USB Debugger). The EUD is a mini-USB hub
implemented on chip to support the USB-based debug and trace capabilities.
Apart from debug capabilities, EUD has a control peripheral. Control
Peripheral is on when EUD is on and gets signals like USB attach, pet EUD,
charge phone etc. EUD driver listens to events like USB attach or detach
and charger enable or disable and then notifies the USB driver or PMIC
driver respectively about these events via EXTCON. At regular intervals,
the EUD driver receives an interrupt to pet the driver indicating that
the software is functional.

Changes since v3:
- Remove power supply type check in the enable path of EUD
- Use default attribute group to create sysfs attribute
- Updated the dt-binding
Changes since v2:
- Remove module_param and add sysfs support instead
- Simplify if-else condition
- Change if-elseif to switch case
- Return -ENOMEM
- Got rid of unnecessary checks in sysfs store function
- Updated the dt-binding
Changes since v1:
- Remove EUD_NR as it is an unused macro
Changes since v0:
- Remove select SERIAL_CORE from Kconfig as this patch doesn't involve
anything related to serial console
- Changed the dt-bindings to remove extcon and replace it with graphs
to represent a connection with client

Avaneesh Kumar Dwivedi (2):
dt-bindings: Documentation for qcom,eud
Embedded USB Debugger (EUD) driver

Documentation/ABI/stable/sysfs-driver-msm-eud | 5 +
.../devicetree/bindings/soc/qcom/qcom,msm-eud.txt | 43 +++
drivers/soc/qcom/Kconfig | 12 +
drivers/soc/qcom/Makefile | 1 +
drivers/soc/qcom/eud.c | 329 +++++++++++++++++++++
5 files changed, 390 insertions(+)
create mode 100644 Documentation/ABI/stable/sysfs-driver-msm-eud
create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,msm-eud.txt
create mode 100644 drivers/soc/qcom/eud.c