net: phy: micrel: center FLP burst timing at 16ms
Like [1], reset the FLP burst timing for the KSZ9031 to the 16ms
specified by the IEEE802.3 standard from the chip's default of 8ms.
For more details, see the "Auto-Negotiation Timing" section of the
KSZ9031RNX datasheet.
[1] https://patchwork.kernel.org/patch/6558371/
Signed-off-by: Ash Charles <ash.charles@savoirfairelinux.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 6b313a9..28a1401 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -415,11 +415,31 @@
return 0;
}
+
+static int ksz9031_center_flp_timing(struct phy_device *phydev)
+{
+ struct phy_driver *drv = phydev->drv;
+ int ret = 0;
+
+ if (!drv || !drv->writeext)
+ return -EOPNOTSUPP;
+
+ ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_LO, 0x1A80);
+ if (ret)
+ return ret;
+
+ ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_HI, 0x6);
+ return ret;
+}
#else
static int ksz9031_of_config(struct phy_device *phydev)
{
return 0;
}
+static int ksz9031_center_flp_timing(struct phy_device *phydev)
+{
+ return 0;
+}
#endif
/* Accessors to extended registers*/
@@ -472,6 +492,9 @@
ret = ksz9031_of_config(phydev);
if (ret)
return ret;
+ ret = ksz9031_center_flp_timing(phydev);
+ if (ret)
+ return ret;
return genphy_config(phydev);
}