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

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




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@xxxxxxxxxx>:
> 
> > On Thu, Nov 19, 2015 at 09:17:37AM +0800, Andy Yan wrote:
> > > Hi Rob:
> > >
> > > On 2015年11月19日 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

Attachment: signature.asc
Description: PGP signature


[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux