On 27/01/2021 14:07:59+0100, Rasmus Villemoes wrote:

On 26/01/2021 23.48, Alexandre Belloni wrote:

quoted

On 21/12/2020 22:17:54+0100, Rasmus Villemoes wrote:

quoted

On 19/12/2020 02.34, Alexandre Belloni wrote:

quoted

pcf2127, pcf2129 and pca2129 support start-year and reset-source.

No, the 2129 variant doesn't even have a reset output pin. Not sure if
there's any way to reflect that, and it probably doesn't matter, since
nobody's going to add the reset-source property to a 2129 node. But the
commit message is a bit misleading.

Actually no, the INT pin can be used as a reset, the pcf/pca2129
can be used as a watchdog and so it may need the reset-source property.

Unless I'm missing something, that would require some rather creative
extra circuitry: The interrupt pin is kept low until the appropriate bit
in the rtc is cleared, so if that is routed directly to a reset pin on
the SOC, the SOC would be kept in reset indefinitely.

You mean inverting the level of INT? I don't think this is creative or
complicated...
And anyway, INT# is active low, like RST# so if the SoC has an RST#
input, this should just work.

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com