[PATCH v2 0/3] Extend rtc-armada38x support for Armada 7K/8K

Alexandre Belloni
2017-02-20T17:36:33Z

On 20/02/2017 at 18:06:11 +0100, Gregory CLEMENT wrote:
> On ven., f?vr. 17 2017, Gregory CLEMENT <gregory.clement@free-electrons.com> wrote:
>
> > The Armada 7K/8K SoCs use the same RTC IP than the Armada 38x. However
> > the SOC integration differs in 2 points:
> > - MBUS bridge timing initialization
> > - IRQ configuration at SoC level
> >
> > This patch set extends the driver support to these SoCs family.
> >
> > In this second version the device tree was updated allowing to use the
> > RTC on Armada 80x0 SoCs. Indeed on the Armada 80x0, the RTC clock in
> > CP master is not connected (by package) to the oscillator. So this one
> > is disabled for the Armada 8020 and the Armada 8040. On these SoCs it
> > will be the RTC clock in CP slave connected to the oscillator which
> > will be used.
>
> I saw on IRC than Russell managed to have a more coherent date with this
> series on his 8040 based board. For the record, as the U-Boot on this
> board didn't provide a "date reset" command for the RTC located on CP
> slave, then Russell needed to do the following:
>
> devmem2 0xf428401c w 0
> devmem2 0xf4284018 w 0x2000

The question being what does that do and whether it could be done in the
driver instead.

--
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering