net: dp83640: fix broken calibration routine.

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>

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 496e02f961d37039ff56d5e45a8aa28aa0f44b91..7a068d99ea46cebeb957fd098b3e099342eace47 100644 (file)
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -47,7 +47,7 @@
 #define PSF_TX         0x1000
 #define EXT_EVENT      1
 #define CAL_EVENT      7
-#define CAL_TRIGGER    7
+#define CAL_TRIGGER    1
 #define DP83640_N_PINS 12
 
 #define MII_DP83640_MICR 0x11