Re: [rtc-linux] [PATCH 1/2] rtc: pcf2127: add support for pcf2127 watchdog functionality

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On 30/08/2017 at 09:45:06 +0200, Sean Nyekjær wrote:
> 
> 
> On 2017-08-29 17:07, Alexandre Belloni wrote:
> > Hi Sean,
> > 
> > I know this patch is 7 months old but I never had the time to write a
> > proper reply.
> > 
> > This is using a pretty old API. Can you register a proper watchdog using
> > the watchdog subsystem (see drivers/watchdog)? Also, please copy the
> > watchdog maintainers.
> > 
> > I understand this will require a significant rewrite effort but the
> > final code will be quite cleaner.
> Hi Alexandre
> 
> I unfortunately don't have access to the hardware anymore...
> I think it would be very risky to rewrite the whole code without testing it
> :-)
> 

Ok, too bad. :(

> Yes this driver is quite hacky in some ways. It could be nice if the
> watchdog part for this could be in the driver/watchdog and the rtc part
> here. Maybe we could have 2 entries in the devicetree that shared the same
> i2c device address.
> 

If you want to go that route, the proper way is to use the MFD
subsystem.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com



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