[PATCH 3.16 166/254] phy: Add helper function to check phy interface mode

[Ben Hutchings]

3.16.55-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Iyappan Subramanian <isubramanian@xxxxxxx>

commit 32d0f7830d9be5b1652a718e050d808b4908155f upstream.

Added helper function that checks phy_mode is RGMII (all variants)
'bool phy_interface_mode_is_rgmii(phy_interface_t mode)'

Changed the following function, to use the above.
'bool phy_interface_is_rgmii(struct phy_device *phydev)'

Signed-off-by: Iyappan Subramanian <isubramanian@xxxxxxx>
Suggested-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Suggested-by: Andrew Lunn <andrew@xxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 include/linux/phy.h | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -630,14 +630,24 @@ static inline bool phy_is_internal(struc
 }
 
 /**
+ * phy_interface_mode_is_rgmii - Convenience function for testing if a
+ * PHY interface mode is RGMII (all variants)
+ * @mode: the phy_interface_t enum
+ */
+static inline bool phy_interface_mode_is_rgmii(phy_interface_t mode)
+{
+	return mode >= PHY_INTERFACE_MODE_RGMII &&
+		mode <= PHY_INTERFACE_MODE_RGMII_TXID;
+};
+
+/**
  * phy_interface_is_rgmii - Convenience function for testing if a PHY interface
  * is RGMII (all variants)
  * @phydev: the phy_device struct
  */
 static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
 {
-	return phydev->interface >= PHY_INTERFACE_MODE_RGMII &&
-		phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
+	return phy_interface_mode_is_rgmii(phydev->interface);
 }
 
 /**