On 05/16/2018 02:01 AM, Marco Felsch wrote:
Hi Steve and Guenter,
On Wed, May 16, 2018 at 07:35:13AM +0000, Steve Twiss wrote:
On 15 May 2018 19:44, Guenter Roeck wrote,
Subject: Re: [PATCH v2] watchdog: da9063: Fix setting/changing timeout
On Wed, May 09, 2018 at 04:10:15PM +0200, Marco Felsch wrote:
Hi Steve,
That would be great looking forward to hear from you. I will prepare a v3 if it is.
Any updates ?
Guenter
Hi Guenter and Marco,
Thank you for your patience.
The best advice I can give at the moment is:
Please follow what has been done in the DA9062 and DA9053 device drivers.
https://elixir.bootlin.com/linux/latest/source/drivers/watchdog/da9062_wdt.c#L90
https://elixir.bootlin.com/linux/latest/source/drivers/watchdog/da9052_wdt.c#L76
In these cases:
"setting TWDSCALE to zero for at least 150 us before writing the new value"
Okay. I tested it without a delay and saw no issues but I will add the
delay to be on the safe side.
Is that okay for you Guenter?
Yes. Better safe than sorry.
Thanks,
Guenter
There will be a longer answer, but that must wait until the formal datasheets have
been clarified by the hardware engineers.
Regards,
Steve
Regards,
Marco
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