phy: add support for a reset-gpio specification

The framework only asserts (for now) that the reset gpio is not active.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index e977ba931878..307f72a0f2e2 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -34,6 +34,7 @@
 #include <linux/io.h>
 #include <linux/uaccess.h>
 #include <linux/of.h>
+#include <linux/gpio/consumer.h>
 
 #include <asm/irq.h>
 
@@ -1570,9 +1571,16 @@ 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
          */