From: Fu Wei fu.wei@linaro.org
This patchset:
(1)Introdouces Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt for FDT info of SBSA Generic Watchdog, and give two examples of adding SBSA Generic Watchdog device node into the dts files: foundation-v8.dts and amd-seattle-soc.dtsi
(2)Introdouce "pretimeout" into the watchdog framework
(3)Introdouces ARM SBSA watchdog driver a.Use linux kernel watchdog framework b.Work with FDT on ARM64 c.Use "pretimeout" in watchdog framework d.In first timeout(WS0), do panic to save system context e.Support geting timeout and pretimeout from parameter and FDT at the driver init stage
(4)Parse SBSA Generic Watchdog Structure in GTDT table of ACPI, and create a platform device with that information This platform device can be used by This Watchdog driver
This patchset has been tested with watchdog daemon (ACPI/FDT, module/build-in) on the following platforms: (1)ARM Foundation v8 model (2)AMD Seattle B0
Fu Wei (6): Documentation: add sbsa-gwdt.txt documentation ARM64: add SBSA Generic Watchdog device node in foundation-v8.dts ARM64: add SBSA Generic Watchdog device node in amd-seattle-soc.dtsi Watchdog: introdouce "pretimeout" into framework Watchdog: introdouce ARM SBSA watchdog driver ACPI: import watchdog info of GTDT into platform device
.../devicetree/bindings/watchdog/sbsa-gwdt.txt | 36 ++ arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi | 11 + arch/arm64/boot/dts/arm/foundation-v8.dts | 10 + arch/arm64/kernel/acpi.c | 136 +++++ drivers/watchdog/Kconfig | 10 + drivers/watchdog/Makefile | 1 + drivers/watchdog/sbsa_gwdt.c | 553 +++++++++++++++++++++ drivers/watchdog/watchdog_core.c | 66 +++ drivers/watchdog/watchdog_dev.c | 48 ++ include/linux/watchdog.h | 19 + 10 files changed, 890 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt create mode 100644 drivers/watchdog/sbsa_gwdt.c