On Sat, Feb 28, 2009 at 10:46 AM, Gary Thomas <g...@mlbassoc.com> wrote: > Still looking for some help... I need to be able to locate > the kernel platform_device which corresponds to an instance > from my OF tree. Basically, I have a [somewhat] unrelated > driver which needs to know these things, so the drivers in > question should not have to be affected. > > In particular, I'm working with the net/dsa drivers (Distributed > Switch Architecture) which need access to the network driver as > well as the MII/MDIO bus driver. It doesn't make sense to tie > those drivers back to DSA, but rather let the DSA driver find > its way to them. > > I've defined this in by DTS tree: > lan1 { > cell-index = <0x01>;
Side note, why do you have cell-index here? I suspect that you're using it incorrectly. > compatible = "marvell,m88e609x"; > net_dev = "fsl-gianfar.0"; > mii_bus = "fsl-gianfar_mdio.14"; These two lines don't make much sense. They are encoding Linux internal details with could very well change in the future. > net_devX = <ð0>; > mii_busX = <&mii_bus>; This is the right thing to do. This give you the phandle to the relevant node. Once you have a handle to the node, you can iterate through the of_platform bus devices and look for a node which has a matching node pointer stored in archdata. That will give you a struct device which is contained by a struct of_device (note well: this will give you an of_device, not a platform_device.) I'm working on a set of patches which should make this much easier. I'll try to remember to CC you when I post them to the list. > }; > ... two ways to find the same node. > > Using 'net_dev' (which I admit is pretty hokey), I can look > up the corresponding platform device, which does work for > the DSA layer. What I want is to be able to get to this > from the 'net_devX' pointer, but I don't seem to be able > to get out of the OF tree and into the actual platform > device tree to find the appropriate instance. > > Any pointers? > > Thanks > > -- > ------------------------------------------------------------ > Gary Thomas | Consulting for the > MLB Associates | Embedded world > ------------------------------------------------------------ > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-dev > -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev