Chromeos devices are equipped with the embedded controller (EC) that can be used as a watchdog. The following patches updates the structures and definitions required to communicate with EC-based watchdog and implements the driver itself. V1:https://patchwork.kernel.org/project/linux-watchdog/patch/20240117102450.4080839-1-lma@xxxxxxxxxxxx/ V2:https://patchwork.kernel.org/project/linux-watchdog/list/?series=817925 V3:https://patchwork.kernel.org/project/linux-watchdog/list/?series=818036 Changelog V3->V4: * updated sizeof() argument with pointer dereference * added cros_ec_wdt_id to the driver structure * "mfd: cros_ec: Register EC-based watchdog subdevice" has been already applied to the for-mfd-next V2->V3: * drop "-drv" from driver name * use format #define<space>NAME<tab>value V1->V2: * Split into three patches * Supplement the watchdog configuration with min/max timeouts * Removed struct cros_ec_wdt_data and get aligned to watchdog framework * Simplified suspend/resume callbacks * Removed excessive log messages * Reworked cros_ec_wdt_send_hang_detect() function to be more generic * Usage of devm_* allowed to delete .remove module callback * Changed MODULE_ALIAS to MODULE_DEVICE_TABLE * Moved clearing bootstatus (on EC) to probe() and thanks to that got rid of .shutdown() module callback * Fixed/removed comments, removed unused includes and general cleanup Best regards, Lukasz Lukasz Majczak (3): platform/chrome: Update binary interface for EC-based watchdog watchdog: Add ChromeOS EC-based watchdog driver mfd: cros_ec: Register EC-based watchdog subdevice MAINTAINERS | 6 + drivers/mfd/cros_ec_dev.c | 9 + drivers/watchdog/Kconfig | 11 + drivers/watchdog/Makefile | 1 + drivers/watchdog/cros_ec_wdt.c | 204 ++++++++++++++++++ .../linux/platform_data/cros_ec_commands.h | 78 +++---- 6 files changed, 266 insertions(+), 43 deletions(-) create mode 100644 drivers/watchdog/cros_ec_wdt.c -- 2.43.0.429.g432eaa2c6b-goog
