[PATCH v2 0/2] Add a watchdog driver that uses ARM Secure Monitor Calls.

[Evan Benn]

This is currently supported in firmware deployed on oak, hana and elm mt8173
chromebook devices. The kernel driver is written to be a generic SMC
watchdog driver.

Arm Trusted Firmware upstreaming review:
    https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405

Patch to add oak, hana, elm device tree:
    https://lore.kernel.org/linux-arm-kernel/20200110073730.213789-1-hsinyi@xxxxxxxxxxxx/
I would like to add the device tree support after the above patch is
accepted.

Changes in v3:
- Change name back to arm
- Add optional get_timeleft op
- change name to arm_smc_wdt

Changes in v2:
- Change name arm > mt8173
- use watchdog_stop_on_reboot
- use watchdog_stop_on_unregister
- use devm_watchdog_register_device
- remove smcwd_shutdown, smcwd_remove
- change error codes

Evan Benn (1):
  dt-bindings: watchdog: Add ARM smc wdt for mt8173 watchdog

Julius Werner (1):
  watchdog: Add new arm_smd_wdt watchdog driver

 .../bindings/watchdog/arm-smc-wdt.yaml        |  30 +++
 MAINTAINERS                                   |   7 +
 arch/arm64/configs/defconfig                  |   1 +
 drivers/watchdog/Kconfig                      |  13 ++
 drivers/watchdog/Makefile                     |   1 +
 drivers/watchdog/arm_smc_wdt.c                | 181 ++++++++++++++++++
 6 files changed, 233 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
 create mode 100644 drivers/watchdog/arm_smc_wdt.c

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2.26.0.292.g33ef6b2f38-goog