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

[Evan Benn]

Apologies I forgot to add this note to my cover letter.

Xingyu do you mind seeing if you can modify your ATF firmware to match
this driver?
We can add a compatible or make other changes to suit you.

Thanks


On Fri, Apr 3, 2020 at 4:29 PM Evan Benn <evanbenn@xxxxxxxxxxxx> wrote:
>
> 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
>
> --
> 2.26.0.292.g33ef6b2f38-goog
>