On Tue, 4 Mar 2014 20:04:24 +0100, Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx> wrote: > Dear Florian Fainelli, > > On Tue, 4 Mar 2014 10:43:12 -0800, Florian Fainelli wrote: > > > > struct fixed_phy { > > > - int id; > > > + int addr; > > > u16 regs[MII_REGS_NUM]; > > > struct phy_device *phydev; > > > struct fixed_phy_status status; > > > @@ -104,8 +104,8 @@ static int fixed_phy_update_regs(struct fixed_phy *fp) > > > if (fp->status.asym_pause) > > > lpa |= LPA_PAUSE_ASYM; > > > > > > - fp->regs[MII_PHYSID1] = fp->id >> 16; > > > - fp->regs[MII_PHYSID2] = fp->id; > > > + fp->regs[MII_PHYSID1] = 0xdead; > > > + fp->regs[MII_PHYSID2] = 0xbeef; > > > > I am still scratching my head as to whether we want that change to be > > in this particular version of changes, or if we want that to happen at > > a later time when (if?) we can finally get some proper OUI number > > allocation. > > > > Technically we are presenting some sort of ABI to user-space, although > > detecting a fixed PHY device by reading its MII_PHYSID1/2 and matching > > it against its PHY address on the fixed MDIO bus would have been a > > little "weak" (especially when you can check that the parent device in > > sysfs is the fixed-0 bus). > > Well the problem is that fp->id really isn't an id, it's the fake > address of the PHY on the fake fixed MDIO bus. So it would mean that > the MII_PHYSID of the first fixed PHY would probably be 0x0, then the > second would have 0x1, then 0x2, and so on. I think the change is reasonable, but I'm not thrilled with the 0xdeadbeaf constant. I'd rather PHYSID simply be left as 0. g. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html