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

Message ID 20200221053802.70716-1-evanbenn@chromium.org
Headers show
Series Add a watchdog driver that uses ARM Secure Monitor Calls. | expand

Message

Evan Benn Feb. 21, 2020, 5:38 a.m. UTC 
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@chromium.org/
I would like to add the device tree support after the above patch is
accepted.

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 mt8173,smc-wdt watchdog

Julius Werner (1):
  watchdog: Add new mt8173_smc_wdt watchdog driver

 .../bindings/watchdog/mt8173,smc-wdt.yaml     |  30 ++++
 MAINTAINERS                                   |   7 +
 arch/arm64/configs/defconfig                  |   1 +
 drivers/watchdog/Kconfig                      |  13 ++
 drivers/watchdog/Makefile                     |   1 +
 drivers/watchdog/mt8173_smc_wdt.c             | 160 ++++++++++++++++++
 6 files changed, 212 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/mt8173,smc-wdt.yaml
 create mode 100644 drivers/watchdog/mt8173_smc_wdt.c