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Introduction
This page gives an overview of the WDT driver which is available as part of the Zynq and ZynqMP Linux distribution and in the mainline.Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
HW IP Features
- Configurable timeout interval in seconds.
- Reset on timeout can be selected.
Known Issues and Limitations
- None.
- Dependencies:
- On Zynq MPSoC, Error Manager module (ENABLE_EM) needs to be enabled to handle the WDT error upon timeout.
- PMU does APU sub-system reset upon FPD WDT timeout if ENABLE_RECOVERY flag is defined.
- If ENABLE_RECOVERY is not defined, System Reset error action will be taken upon FPD WDT timeout.
- See Chapter 10 in https://www.xilinx.com/support/documentation/user_guides/ug1137-zynq-ultrascale-mpsoc-swdev.pdf for more details
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- This driver is currently in sync with the mainline kernel except for the following:
watchdog: cadence: Use devm_clk_get_enabled() helper
Change Log
- 2024.1
- Summary
- watchdog: of_xilinx_wdt: Remove unnecessary clock disable call in the remove path
- Commitse71d200None
- Summary
- 2023.2
- None
- 2023.1
- None
- 2022.2
- None
- 2022.1
- None
- 2021.2
- Summary
- Commits
- 2021.1
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