net: fec: Add "phy-reset-active-low" property to DT

We need that for a custom hardware that needs the reverse reset
sequence.

Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
index a9eb611bee68121a01f587a9c296852d0b6a46ce..a4799fff0d1f0cf4a45af3a2fd265e885b59c32f 100644 (file)
--- a/Documentation/devicetree/bindings/net/fsl-fec.txt
+++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
@@ -12,6 +12,9 @@ Optional properties:
   only if property "phy-reset-gpios" is available.  Missing the property
   will have the duration be 1 millisecond.  Numbers greater than 1000 are
   invalid and 1 millisecond will be used instead.
+- phy-reset-active-low : If present then the reset sequence using the GPIO
+  specified in the "phy-reset-gpios" property is reversed (H=reset state,
+  L=operation state).
 - phy-supply : regulator that powers the Ethernet PHY.
 - phy-handle : phandle to the PHY device connected to this device.
 - fixed-link : Assume a fixed link. See fixed-link.txt in the same directory.

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index ef18ca501f9ea6531c7d55eb212f9dfc553b547a..bad0ba29a94a19478a48965beefdae558557772a 100644 (file)
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3191,6 +3191,7 @@ static int fec_enet_init(struct net_device *ndev)
 static void fec_reset_phy(struct platform_device *pdev)
 {
        int err, phy_reset;
+       bool active_low = false;
        int msec = 1;
        struct device_node *np = pdev->dev.of_node;
 
@@ -3206,14 +3207,17 @@ static void fec_reset_phy(struct platform_device *pdev)
        if (!gpio_is_valid(phy_reset))
                return;
 
+       active_low = of_property_read_bool(np, "phy-reset-active-low");
+
        err = devm_gpio_request_one(&pdev->dev, phy_reset,
-                                   GPIOF_OUT_INIT_LOW, "phy-reset");
+                       active_low ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
+                       "phy-reset");
        if (err) {
                dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err);
                return;
        }
        msleep(msec);
-       gpio_set_value_cansleep(phy_reset, 1);
+       gpio_set_value_cansleep(phy_reset, !active_low);
 }
 #else /* CONFIG_OF */
 static void fec_reset_phy(struct platform_device *pdev)