net: phy: dp83867: allow RGMII_TXID/RGMII_RXID interface types

[ Upstream commit 34c55cf2fc75f8bf6ba87df321038c064cf2d426 ]

Currently dp83867 driver returns error if phy interface type
PHY_INTERFACE_MODE_RGMII_RXID is used to set the rx only internal
delay. Similarly issue happens for PHY_INTERFACE_MODE_RGMII_TXID.
Fix this by checking also the interface type if a particular delay
value is missing in the phy dt bindings. Also update the DT document
accordingly.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/net/ti,dp83867.txt b/Documentation/devicetree/bindings/net/ti,dp83867.txt
index 5d21141..75bcaa3 100644 (file)
--- a/Documentation/devicetree/bindings/net/ti,dp83867.txt
+++ b/Documentation/devicetree/bindings/net/ti,dp83867.txt
@@ -3,9 +3,11 @@
 Required properties:
        - reg - The ID number for the phy, usually a small integer
        - ti,rx-internal-delay - RGMII Receive Clock Delay - see dt-bindings/net/ti-dp83867.h
-               for applicable values
+               for applicable values. Required only if interface type is
+               PHY_INTERFACE_MODE_RGMII_ID or PHY_INTERFACE_MODE_RGMII_RXID
        - ti,tx-internal-delay - RGMII Transmit Clock Delay - see dt-bindings/net/ti-dp83867.h
-               for applicable values
+               for applicable values. Required only if interface type is
+               PHY_INTERFACE_MODE_RGMII_ID or PHY_INTERFACE_MODE_RGMII_TXID
        - ti,fifo-depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h
                for applicable values
 

diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index 91177a4..4cad955 100644 (file)
--- a/drivers/net/phy/dp83867.c
+++ b/drivers/net/phy/dp83867.c
@@ -113,12 +113,16 @@ static int dp83867_of_init(struct phy_device *phydev)
 
        ret = of_property_read_u32(of_node, "ti,rx-internal-delay",
                                   &dp83867->rx_id_delay);
-       if (ret)
+       if (ret &&
+           (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+            phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID))
                return ret;
 
        ret = of_property_read_u32(of_node, "ti,tx-internal-delay",
                                   &dp83867->tx_id_delay);
-       if (ret)
+       if (ret &&
+           (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+            phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID))
                return ret;
 
        return of_property_read_u32(of_node, "ti,fifo-depth",