wdt: Support wdt on ROHM BD9576MUF and BD9573MUF

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Add Watchdog support for ROHM BD9576MUF and BD9573MUF PMICs which are
mainly used to power the R-Car series processors. The watchdog is
pinged using a GPIO and enabled using another GPIO. Additionally
watchdog time-out can be configured to HW prior starting the watchdog.
Watchdog timeout can be configured to detect only delayed ping or in
a window mode where also too fast pings are detected.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

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Matti Vaittinen 2021-03-10 10:08:36 +02:00 • committed by Lee Jones

parent 0e9692607f

commit b237bcac55

3 changed files with 305 additions and 0 deletions

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13

drivers/watchdog/Kconfig

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1

drivers/watchdog/Makefile

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291

drivers/watchdog/bd9576_wdt.c

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