net: phy: broadcom: move shadow 0x1C register accessors to brcmphy.h

The shadow register 0x1C is used both by the BCM54xxx PHYs and the
BCM7xxx internal PHYs, move the accessors to a common location so both
drivers can use them.

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

1 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/brcmphy.h b/include/linux/brcmphy.h
index be31bf9f60c2..722cf26567fa 100644
--- a/include/linux/brcmphy.h
+++ b/include/linux/brcmphy.h
@@ -195,4 +195,24 @@
 #define MII_BRCM_FET_SHDW_AUXSTAT2      0x1b    /* Auxiliary status 2 */
 #define MII_BRCM_FET_SHDW_AS2_APDE      0x0020  /* Auto power down enable */
 
+/*
+ * Indirect register access functions for the 1000BASE-T/100BASE-TX/10BASE-T
+ * 0x1c shadow registers.
+ */
+static inline int bcm54xx_shadow_read(struct phy_device *phydev, u16 shadow)
+{
+        phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_VAL(shadow));
+        return MII_BCM54XX_SHD_DATA(phy_read(phydev, MII_BCM54XX_SHD));
+}
+
+static inline int bcm54xx_shadow_write(struct phy_device *phydev, u16 shadow,
+                                       u16 val)
+{
+        return phy_write(phydev, MII_BCM54XX_SHD,
+                         MII_BCM54XX_SHD_WRITE |
+                         MII_BCM54XX_SHD_VAL(shadow) |
+                         MII_BCM54XX_SHD_DATA(val));
+}
+
+
 #endif /* _LINUX_BRCMPHY_H */