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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>
This commit is contained in:
Richard Cochran 2015-05-25 11:55:43 +02:00 committed by Greg Kroah-Hartman
parent 2f5f714f6d
commit 5385d8c4fb
1 changed files with 1 additions and 1 deletions
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2
drivers/net/phy/dp83640.c
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@ -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