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watchdog: Add ChromeOS EC-based watchdog driver

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Embedded Controller (EC) present on Chromebook devices
can be used as a watchdog.
Implement a driver to support it.

Signed-off-by: Lukasz Majczak <lma@chromium.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240126095721.782782-3-lma@chromium.org
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Lukasz Majczak
2024-01-26 09:57:20 +00:00
committed by Lee Jones
parent 4d2ff655fb
commit 843dac4d36
4 changed files with 222 additions and 0 deletions
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11
drivers/watchdog/Kconfig
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@@ -181,6 +181,17 @@ config BD957XMUF_WATCHDOG
watchdog. Alternatively say M to compile the driver as a module,
which will be called bd9576_wdt.
config CROS_EC_WATCHDOG
tristate "ChromeOS EC-based watchdog"
select WATCHDOG_CORE
depends on CROS_EC
help
Watchdog driver for Chromebook devices equipped with embedded controller.
Trigger event is recorded in EC and checked on the subsequent boot.
To compile this driver as a module, choose M here: the
module will be called cros_ec_wdt.
config DA9052_WATCHDOG
tristate "Dialog DA9052 Watchdog"
depends on PMIC_DA9052 || COMPILE_TEST