[PATCH v3 2/5] dt-bindings: soc: add document for rockchip reboot notifier driver

Thierry Reding
2015-11-19T15:30:59Z

On Thu, Nov 19, 2015 at 09:39:02PM +0800, Andy Yan wrote:
> Hi Thierry:
>
> 2015-11-19 20:56 GMT+08:00 Thierry Reding <treding@nvidia.com>:
>
> > On Thu, Nov 19, 2015 at 09:17:37AM +0800, Andy Yan wrote:
> > > Hi Rob:
> > >
> > > On 2015?11?19? 06:59, Rob Herring wrote:
> > > >On Wed, Nov 18, 2015 at 05:53:30PM +0800, Andy Yan wrote:
> > > >>Add devicetree binding document for rockchip reboot nofifier driver
> > > >Just reading the subject this is way too specific to the Linux driver
> > > >needs rather than a h/w description. Please don't create fake DT nodes
> > > >just to bind to drivers. Whatever &pmu is is probably what should have
> > > >the DT node. Let the driver for it create child devices if you need
> > > >that.
> > >
> > > This is note a fake DT nodes, we really need it to tell the driver
> > > which register to use to store the reboot mode. Because rockchip
> > > use different register file to store the reboot mode on different
> > > platform, on rk3066,rk3188, rk3288,it use one of the PMU register,
> > on
> > > the incoming RK3036, it use one of the GRF register, and it use
> > one of
> > > the PMUGRF register for arm64 platform rk3368. On the other hand,
> > the
> > > PMU/GRF/PMUGRF register file are mapped as "syscon", then referenced
> > > by other DT nodes by phandle. So maybe let it as a separate DT node
> > > here
> > > is better.
> >
> > In that case you should probably implement a reboot notifier in each of
> > the drivers you list and depending on the generation of the SoC. You can
> > easily parameterize this by matching on the compatible string.
> >
> > Thierry
> >
>
> There is no rockchip specific driver for PMU/GRF/PMUGRF register file I
> list above? they
> use the generic driver ?syscon?

Well, just go and write specific drivers, then.

Thierry
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20151119/2dc1062b/attachment.sig>