[0/5] STM32 ETZPC bus controller

Message

Benjamin GAIGNARD April 20, 2020, 1:47 p.m. UTC

STM32 Extended TrustZone Protection controller act like a firewall on the
platform bus. Depending of its configuration devices could be accessible
by the TrustZone, the co-processor or the non-secure world. ETZPC
configuration could evolve at runtime for example to switch a device from
non-secure world to co-processor.

The series introduce 'firewall' helpers to handle the new devices-tree
properties. These properties are not dedicated to ETZPC and will be reused
for STM32 next generation of bus controller.

Benjamin Gaignard (5):
  dt-bindings: bus: Add firewall bindings
  bus: stm32: Introduce firewall controller helpers
  dt-bindings: bus: Add STM32 ETZPC firewall controller
  bus: stm32: Add stm32 ETZPC firewall bus controller
  ARM: dts: stm32: Use ETZPC firewall bus

 .../bindings/bus/stm32/firewall-consumer.yaml      |  25 ++
 .../bindings/bus/stm32/firewall-provider.yaml      |  18 ++
 .../bindings/bus/stm32/st,stm32-etzpc.yaml         |  46 ++++
 arch/arm/boot/dts/stm32mp151.dtsi                  |   7 +-
 drivers/bus/Kconfig                                |   2 +
 drivers/bus/Makefile                               |   2 +
 drivers/bus/stm32/Kconfig                          |  11 +
 drivers/bus/stm32/Makefile                         |   2 +
 drivers/bus/stm32/firewall.c                       | 266 +++++++++++++++++++++
 drivers/bus/stm32/firewall.h                       |  75 ++++++
 drivers/bus/stm32/stm32-etzpc.c                    | 160 +++++++++++++
 include/dt-bindings/bus/stm32/stm32-etzpc.h        |  90 +++++++
 12 files changed, 702 insertions(+), 2 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/bus/stm32/firewall-consumer.yaml
 create mode 100644 Documentation/devicetree/bindings/bus/stm32/firewall-provider.yaml
 create mode 100644 Documentation/devicetree/bindings/bus/stm32/st,stm32-etzpc.yaml
 create mode 100644 drivers/bus/stm32/Kconfig
 create mode 100644 drivers/bus/stm32/Makefile
 create mode 100644 drivers/bus/stm32/firewall.c
 create mode 100644 drivers/bus/stm32/firewall.h
 create mode 100644 drivers/bus/stm32/stm32-etzpc.c
 create mode 100644 include/dt-bindings/bus/stm32/stm32-etzpc.h