u-boot.git/drivers/watchdog, branch v2026.01

watchdog: Add support for Tegra watchdog timer

2025-10-28T09:27:43Z

Provide support for Tegra watchdog functionality. The WATCHDOG index 0 in conjunction with TIMER 5 is used inline with existing Linux kernel driver. Signed-off-by: Lukasz Majewski Reviewed-by: Svyatoslav Ryhel Signed-off-by: Svyatoslav Ryhel

watchdog: Tighten dependencies on WDT_DAVINCI

2025-10-16T07:16:36Z

The WDT_DAVINCI driver is not safe to compile on 64bit platforms such as allyesconfig on a 64bit host. Tighten the dependencies here to the platforms which could use it today. Signed-off-by: Tom Rini

watchdog: Tighten some watchdog driver dependencies

2025-10-16T07:16:36Z

A few watchdog drivers cannot build without access to some platform specific header files. Express those requirements in Kconfig as well. Signed-off-by: Tom Rini Reviewed-by: Stefan Roese

drivers: watchdog: Enable watchdog support in SPL for Agilex

2025-08-08T14:20:46Z

Enable watchdog as early as possible after clock initialization which is set at 10 seconds. Signed-off-by: Alif Zakuan Yuslaimi Reviewed-by: Tien Fong Chee

watchdog: don't autostart watchdog on STM32MP architecture

2025-07-30T06:01:11Z

On STM32MP reference boards, the watchdog is started by a previous boot stage (e.g. bootrom or secure OS), so the config flag WATCHDOG_AUTOSTART is not required. It's preferable to rely on the DT properties "u-boot,autostart" or "u-boot,noautostart", if needed. For backward compatibility on defconfigs that are based on SPL, thus cannot rely on a previous boot stage for starting the watchdog, enable WATCHDOG_AUTOSTART in their respective defconfig. The change in stm32mp15_dhsom.config is propagated to: - configs/stm32mp15_dhcom_basic.config - configs/stm32mp15_dhcor_basic.config and then to: - stm32mp15_dhcom_basic_defconfig - stm32mp15_dhcom_drc02_basic_defconfig - stm32mp15_dhcom_pdk2_basic_defconfig - stm32mp15_dhcom_picoitx_basic_defconfig - stm32mp15_dhcor_avenger96_basic_defconfig - stm32mp15_dhcor_basic_defconfig - stm32mp15_dhcor_drc_compact_basic_defconfig - stm32mp15_dhcor_testbench_basic_defconfig Signed-off-by: Patrice Chotard Signed-off-by: Antonio Borneo Reviewed-by: Patrice Chotard

watchdog: stm32mp: check the watchdog status

2025-07-30T06:01:11Z

Add a mean to check the IWDG status based on the peripheral version. This is done by either checking the status bit ONF either by updating the reload register with the same value and check if the reload succeed. Signed-off-by: Clément Le Goffic Signed-off-by: Antonio Borneo Reviewed-by: Patrice Chotard

watchdog: arm_smc_wdt: get wdt status through SMCWD_GET_TIMELEFT

2025-07-30T06:01:11Z

The optional SMCWD_GET_TIMELEFT command can be used to detect if the watchdog has already been started. See the implementation in OP-TEE secure OS [1]. At probe time, check if the watchdog is already started and then call wdt_set_force_autostart(). This will keep U-Boot pinging the watchdog even when the property 'u-boot,noautostart' is present. Link: https://github.com/OP-TEE/optee_os/commit/a7f2d4bd8632 [1] Signed-off-by: Antonio Borneo Reviewed-by: Patrice Chotard

watchdog: wdt-uclass.c: add wdt_set_force_autostart() helper

2025-07-30T06:01:11Z

The watchdog could have been already started by a previous boot stage (e.g. bootrom or secure OS). U-Boot has to start and kick the watchdog even when CONFIG_WATCHDOG_AUTOSTART is not enabled or when the DT property u-boot,noautostart is present. Add the helper wdt_set_force_autostart() that can be called by the driver's probe() when it detects that the watchdog has already been started and is running. Co-developed-by: Patrice Chotard Signed-off-by: Patrice Chotard Signed-off-by: Antonio Borneo Reviewed-by: Patrice Chotard

Merge tag 'qcom-main-20250714' of https://source.denx.de/u-boot/custodians/u-boot-snapdragon

2025-07-14T14:54:19Z

CI: https://source.denx.de/u-boot/custodians/u-boot-snapdragon/-/pipelines/27056 - Fix unused access in ufetch - Add missing clock for SM8650 - Port the Linux SPMI GPIO driver and port over SM8550 (other platforms should follow)

watchdog: qcom-wdt: Drop read check on write-only WDT_EN register

2025-07-14T13:35:24Z

On some Qualcomm platforms, such as Dragonwing boards, the WDT_EN register is write-only. Reading it back after enabling the watchdog can return invalid data or cause unexpected behavior. In particular, the check: if (readl(wdt_addr(wdt, WDT_EN)) != 1) may fail even though the watchdog is correctly enabled and running. This leads to misleading error messages and unnecessary failures. Removing the read check ensures compatibility and avoids false negatives on platforms where WDT_EN is not readable. This work builds upon this previous submission: https://lore.kernel.org/u-boot/20250625094607.1348494-1-gopinath.sekar@oss.qualcomm.com/ Signed-off-by: Balaji Selvanathan Reviewed-by: Stefan Roese Link: https://lore.kernel.org/r/20250701065738.1644669-1-balaji.selvanathan@oss.qualcomm.com Signed-off-by: Casey Connolly