[v12,0/8] Turris Omnia MCU driver

Hello Andy, Hans, Ilpo, Arnd, Gregory, and others,

this is v12 of the series adding Turris Omnia MCU driver.

Changes since v11:
- fixed some includes, suggested by Andy
- moved #include <linux/turris-omnia-mcu-interface.h> after the other
  includes, since it is domain specific, suggested by Andy
- in patch 2, use sizeof() of dest buffer in memcpy call, instead of
  ETH_ALEN constant, as suggested by Andy
- in patch 3, dropped the .has_int member of omnia GPIO definition
  structure, and added is_int_bit_valid() function instead, as suggested
  by Andy
- in patch 3, changed int to unsigned int where appropriate, as
  suggested by Andy
- in patch 3, fixed docstring indentation, suggested by Andy
- in patch 4 dropped #include <linux/rtc.h>, and instead declared struct
  rtc_device, it is only used as a pointer, suggested by Andy
- in patch 5, renamed the completion from trng_completion to
  trng_entropy_available
- in patch 5, use gpio_device_get_desc() instead of gpiochip_get_desc()
  when mapping IRQ (as discussed with Andy and Bart)
- in patch 5, dropped setting the priv member of hwrng, and instead use
  container_of() to get the driver private structure, suggested by
  Herbert

Links to previous cover letters (v1 to v11):
  https://patchwork.kernel.org/project/linux-soc/cover/20230823161012.6986-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20230919103815.16818-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20231023143130.11602-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20231026161803.16750-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20240323164359.21642-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20240418121116.22184-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20240424173809.7214-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20240430115111.3453-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20240508103118.23345-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20240510101819.13551-1-kabel@kernel.org/
  https://patchwork.kernel.org/project/linux-soc/cover/20240605161851.13911-1-kabel@kernel.org/

Marek Behún (8):
  dt-bindings: firmware: add cznic,turris-omnia-mcu binding
  platform: cznic: Add preliminary support for Turris Omnia MCU
  platform: cznic: turris-omnia-mcu: Add support for MCU connected GPIOs
  platform: cznic: turris-omnia-mcu: Add support for poweroff and wakeup
  platform: cznic: turris-omnia-mcu: Add support for MCU watchdog
  platform: cznic: turris-omnia-mcu: Add support for MCU provided TRNG
  ARM: dts: turris-omnia: Add MCU system-controller node
  ARM: dts: turris-omnia: Add GPIO key node for front button

 .../sysfs-bus-i2c-devices-turris-omnia-mcu    |  113 ++
 .../firmware/cznic,turris-omnia-mcu.yaml      |   86 ++
 MAINTAINERS                                   |    4 +
 .../dts/marvell/armada-385-turris-omnia.dts   |   35 +-
 drivers/platform/Kconfig                      |    2 +
 drivers/platform/Makefile                     |    1 +
 drivers/platform/cznic/Kconfig                |   48 +
 drivers/platform/cznic/Makefile               |    8 +
 .../platform/cznic/turris-omnia-mcu-base.c    |  408 +++++++
 .../platform/cznic/turris-omnia-mcu-gpio.c    | 1088 +++++++++++++++++
 .../cznic/turris-omnia-mcu-sys-off-wakeup.c   |  260 ++++
 .../platform/cznic/turris-omnia-mcu-trng.c    |  103 ++
 .../cznic/turris-omnia-mcu-watchdog.c         |  130 ++
 drivers/platform/cznic/turris-omnia-mcu.h     |  194 +++
 include/linux/turris-omnia-mcu-interface.h    |  249 ++++
 15 files changed, 2728 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-i2c-devices-turris-omnia-mcu
 create mode 100644 Documentation/devicetree/bindings/firmware/cznic,turris-omnia-mcu.yaml
 create mode 100644 drivers/platform/cznic/Kconfig
 create mode 100644 drivers/platform/cznic/Makefile
 create mode 100644 drivers/platform/cznic/turris-omnia-mcu-base.c
 create mode 100644 drivers/platform/cznic/turris-omnia-mcu-gpio.c
 create mode 100644 drivers/platform/cznic/turris-omnia-mcu-sys-off-wakeup.c
 create mode 100644 drivers/platform/cznic/turris-omnia-mcu-trng.c
 create mode 100644 drivers/platform/cznic/turris-omnia-mcu-watchdog.c
 create mode 100644 drivers/platform/cznic/turris-omnia-mcu.h
 create mode 100644 include/linux/turris-omnia-mcu-interface.h