On Wed, Mar 4, 2009 at 3:38 AM, Anton Vorontsov <avoront...@ru.mvista.com> wrote: > Currently it doesn't matter where the mdio nodes are placed, but with > power management support (i.e. when sleep = <> properties will take > effect), mdio nodes placement will become important: mdio controller > is a part of the ethernet block, so the mdio nodes should be placed > correctly. Otherwise we may wrongly assume that MDIO controllers are > available during sleep. > > Suggested-by: Scott Wood <scottw...@freescale.com> > Signed-off-by: Anton Vorontsov <avoront...@ru.mvista.com> > --- > > On Tue, Mar 03, 2009 at 12:39:38PM -0600, Scott Wood wrote: >> Anton Vorontsov wrote: >>> On Tue, Mar 03, 2009 at 11:57:46AM -0600, Scott Wood wrote: >>>> On Tue, Mar 03, 2009 at 07:02:01PM +0300, Anton Vorontsov wrote: >>>>> m...@24520 { >>>>> @@ -226,6 +244,8 @@ >>>>> interrupt-parent = <&ipic>; >>>>> tbi-handle = <&tbi0>; >>>>> phy-handle = <&phy2>; >>>>> + sleep = <&pmc 0xc0000000>; >>>>> + fsl,magic-packet; >>>>> }; >>>> Note that this makes it look to the kernel like enet0 can be put to sleep >>>> without putting the mdio (which is shared with enet1) to sleep. This is >>>> why I moved mdio under the ethernet node on 8313erdb. >>> >>> And that isn't absolutely correct either, since enet1 depends on >>> net0... If enet0's mdio goes into sleep mode before enet1, then >>> enet1 will fail to send power-down command to its PHY... >> >> But the kernel knows that enet1 depends on mdio0. Getting the kernel to >> act on that knowledge isn't the device tree's problem. > > Well, that makes sense. I'd like to move mdio nodes in a separate > patch though, since the original patch becomes difficult to review > because of too many changes... > > A question though... do we want real addr translation via ranges, or > the dummy "ranges;" are OK? > > Here is the RFC. It's tested to work on MPC8377-RDB.
Last time I brought up a similar issue with a MPC8313 patch. Looks like the consensus is that we shouldn't use compatible = "simple-bus" for gianfar nodes. - Leo _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev