Porting the ibm_newemac driver to use phylib (and other PHY/MAC questions)
benh at kernel.crashing.org
Wed Apr 22 18:21:16 EST 2009
On Mon, 2009-04-20 at 20:10 -0400, Kyle Moffett wrote:
> > IIRC, Ben had some issues with how phylib and the EMAC would need to
> > interact. Not sure if he has those written down somewhere or not.
> > (CC'd).
> Hmm, yeah, I'd be interested to see those. There's enough similar
> between phylib and the EMAC and sungem drivers that I'm considering a
> series of somewhat-mechanical patches to make EMAC and sungem use the
> "struct phy_device" and "struct mii_bus" from phylib, possibly
> abstracting out some helper functions along the way.
Yup, emac and sungem predate phylib.
I had a quick look at what it would take to port at least emac over, the
main issue was that I want to be able to sleep (ie, take a mutex) in my
mdio read/write functions, and back then, phylib wouldn't let me do that
due to spinlock and timer/softirq usage.
More information about the Linuxppc-dev