net: fec: add phy-reset-duration for device tree probe

Different boards may require different phy reset duration.  Add property
phy-reset-duration for device tree probe, so that the boards that need
a longer reset duration can specify it in their device tree.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index f174070646f5..dafd797a6069 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -1507,11 +1507,17 @@ static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev)
 static void __devinit fec_reset_phy(struct platform_device *pdev)
 {
         int err, phy_reset;
+        int msec = 1;
         struct device_node *np = pdev->dev.of_node;
 
         if (!np)
                 return;
 
+        of_property_read_u32(np, "phy-reset-duration", &msec);
+        /* A sane reset duration should not be longer than 1s */
+        if (msec > 1000)
+                msec = 1;
+
         phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
         err = devm_gpio_request_one(&pdev->dev, phy_reset,
                                     GPIOF_OUT_INIT_LOW, "phy-reset");
@@ -1519,7 +1525,7 @@ static void __devinit fec_reset_phy(struct platform_device *pdev)
                 pr_debug("FEC: failed to get gpio phy-reset: %d\n", err);
                 return;
         }
-        msleep(1);
+        msleep(msec);
         gpio_set_value(phy_reset, 1);
 }
 #else /* CONFIG_OF */