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Add the AXP8191 watchdog child node under the PMIC (&pmu0) and enable CONFIG_AW_AXP_WATCHDOG so the Cubie A7S can use the PMIC RESTART watchdog, which power-cycles the PMIC rails (a recovery the SoC watchdog cannot perform). Requires the axp2xx_wdt driver + "x-powers,axp2xx-watchdog" MFD cell from allwinner-bsp.
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Enables the AXP8191 PMIC watchdog on the Cubie A7S.
configs/cubie_a7s/linux-6.6/board.dts: add thewatchdogchild node under the PMIC (&pmu0) withcompatible = "x-powers,axp2xx-watchdog".configs/default/linux-6.6/bsp_defconfig:CONFIG_AW_AXP_WATCHDOG=y.The PMIC RESTART watchdog power-cycles the PMIC rails — a recovery the sunxi SoC watchdog cannot do (it resets only the SoC, not the PMIC-supplied rails).
Depends on
Driver + MFD cell: radxa/allwinner-bsp#17. That PR must land (or be built together) or this node has no driver to bind.
Testing
Cubie A7S (A733, AXP8191) — with #17, the watchdog binds and RESTART power-cycles the PMIC.