Hello,

On Thu, Aug 22, 2019 at 03:19:35PM +0200, Bruno Thomsen wrote:
> Add partial support for the watchdog functionality of
> both PCF2127 and PCF2129 chips.

I have a board here with a pcf2127 that has the #RST pin
not connected.

The problem this creates is: The bootloader arms the SoC's watchdog and
jumps into Linux. The pcf2127 driver happens to load first, so watchdog0
is provided by the RTC (but non-functional). Systemd is configured to
feed the watchdog, but happens to feed the wrong one, so the machine
resets shortly after it is up :-|

So I wonder if we need a dt property that tells the driver if the RST
line is connected or not.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |