diff mbox series

[net-next,1/4] net: phy: dp83869: Update port-mirroring to read straps

Message ID 20200519141813.28167-2-dmurphy@ti.com
State New
Headers show
Series DP83869 Enhancements | expand

Commit Message

Dan Murphy May 19, 2020, 2:18 p.m. UTC 
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.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
 drivers/net/phy/dp83869.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/phy/dp83869.c b/drivers/net/phy/dp83869.c
index 7996a4aea8d2..073a0f7754a5 100644
--- 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))