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
signature.asc
Description: PGP signature