Revert "phy: add support for a reset-gpio specification"

Commit da47b457 ("phy: add support for a reset-gpio specification")
causes the following xtensa qemu crash according to Guenter Roeck:

[    9.366256] libphy: ethoc-mdio: probed
[    9.367389]  (null): could not attach to PHY
[    9.368555]  (null): failed to probe MDIO bus
[    9.371540] Unable to handle kernel paging request at virtual address 0000001c
[    9.371540]  pc = d0320926, ra = 903209d1
[    9.375358] Oops: sig: 11 [#1]

This reverts commit da47b457.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/phy.txt

@@ -35,8 +35,6 @@ Optional Properties:
 - broken-turn-around: If set, indicates the PHY device does not correctly
   release the turn around line low at the end of a MDIO transaction.
 
-- reset-gpios: Reference to a GPIO used to reset the phy.
-
 Example:
 
 ethernet-phy@0 {
@@ -44,5 +42,4 @@ ethernet-phy@0 {
 	interrupt-parent = <40000>;
 	interrupts = <35 1>;
 	reg = <0>;
-	reset-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
 };

drivers/net/phy/phy_device.c

@@ -34,7 +34,6 @@
 #include <linux/io.h>
 #include <linux/uaccess.h>
 #include <linux/of.h>
-#include <linux/gpio/consumer.h>
 
 #include <asm/irq.h>
 
@@ -1571,16 +1570,9 @@ static int phy_probe(struct device *dev)
 	struct device_driver *drv = phydev->mdio.dev.driver;
 	struct phy_driver *phydrv = to_phy_driver(drv);
 	int err = 0;
-	struct gpio_descs *reset_gpios;
 
 	phydev->drv = phydrv;
 
-	/* take phy out of reset */
-	reset_gpios = devm_gpiod_get_array_optional(dev, "reset",
-						    GPIOD_OUT_LOW);
-	if (IS_ERR(reset_gpios))
-		return PTR_ERR(reset_gpios);
-
 	/* Disable the interrupt if the PHY doesn't support it
 	 * but the interrupt is still a valid one
 	 */