net: dp83640: fix broken calibration routine.

[ Upstream commit 397a253af5031de4a4612210055935309af4472c ]

Currently, the calibration function that corrects the initial offsets
among multiple devices only works the first time.  If the function is
called more than once, the calibration fails and bogus offsets will be
programmed into the devices.

In a well hidden spot, the device documentation tells that trigger indexes
0 and 1 are special in allowing the TRIG_IF_LATE flag to actually work.

This patch fixes the issue by using one of the special triggers during the
recalibration method.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 7490b6c866e685072f8bef2c0b63a090b4061b10..d2907a6e3dab8d142db3a34db0af63fafd8531ef 100644 (file)
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -45,7 +45,7 @@
 #define PSF_TX         0x1000
 #define EXT_EVENT      1
 #define CAL_EVENT      7
-#define CAL_TRIGGER    7
+#define CAL_TRIGGER    1
 #define PER_TRIGGER    6
 
 #define MII_DP83640_MICR 0x11