On Mon, Sep 09, 2013 at 10:53:36PM +0800, Shawn Guo wrote: > On Tue, Sep 03, 2013 at 12:26:23PM +0800, Fugang Duan wrote: > > Add fec phy gpio reset for imx6sl evk board. imx6sl evk board > > use GPIO4_21 to do phy reset, so add phy-reset-gpios and > > phy-reset-duration propery initial for fec device node. > > > > Signed-off-by: Fugang Duan <B38611@xxxxxxxxxxxxx> > > I have to drop this patch for now, because it causes a regression for > me. > > Before this patch, we can at least get a working fec driver in kernel if > U-Boot sets it up properly, e.g. we download kernel from network. But > with the patch, the fec driver stops working on linux-next in the same > use case. I think the FEC driver has doesn't wait enough time after it deasserts the phy reset before it accesses the phy. At least I once got the impression, but I haven't digged deeper so far. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- 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
