On Mon, Nov 30, 2015 at 9:32 AM, Lothar Waßmann [off-list ref] wrote:

-       gpio_set_value_cansleep(phy_reset, 1);
+       gpiod_set_value_cansleep(phy_reset, 1);

This will break some existing DTBs.

Currently the fec driver does not care whether 'phy-reset-gpios' is
active low or active high. (Yes, it was a mistake to assume in the
driver that it is always active low.)

After this change the polarity will be taken into account and may
break some dtb's.

I suggest you to send a single patch with the minimum changes to fix
the regression caused by 8fff755e9f8d ("net: fec: Ensure clocks are
enabled while using mdio bus").