net: phy: dp83869: Update port-mirroring to read straps

The device tree may not have the property set for port mirroring
because the hardware may have it strapped. If the property is not in the
DT then check the straps and set the port mirroring bit appropriately.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/dp83869.c b/drivers/net/phy/dp83869.c
index 7996a4a..073a0f7 100644 (file)
--- a/drivers/net/phy/dp83869.c
+++ b/drivers/net/phy/dp83869.c
@@ -66,6 +66,7 @@
 
 /* STRAP_STS1 bits */
 #define DP83869_STRAP_STS1_RESERVED            BIT(11)
+#define DP83869_STRAP_MIRROR_ENABLED           BIT(12)
 
 /* PHYCTRL bits */
 #define DP83869_RX_FIFO_SHIFT  12
@@ -191,10 +192,18 @@ static int dp83869_of_init(struct phy_device *phydev)
        else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
                dp83869->io_impedance = DP83869_IO_MUX_CFG_IO_IMPEDANCE_MIN;
 
-       if (of_property_read_bool(of_node, "enet-phy-lane-swap"))
+       if (of_property_read_bool(of_node, "enet-phy-lane-swap")) {
                dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
-       else
-               dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
+       } else {
+               /* If the lane swap is not in the DT then check the straps */
+               ret = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_STRAP_STS1);
+               if (ret < 0)
+                       return ret;
+               if (ret & DP83869_STRAP_MIRROR_ENABLED)
+                       dp83869->port_mirroring = DP83869_PORT_MIRRORING_EN;
+               else
+                       dp83869->port_mirroring = DP83869_PORT_MIRRORING_DIS;
+       }
 
        if (of_property_read_u32(of_node, "rx-fifo-depth",
                                 &dp83869->rx_fifo_depth))