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13 July 2024, 08:20:57 UTC
Revision 25382b991d252aed961cd434176240f9de6bb15f authored by Doug Berger on 16 October 2019, 23:06:32 UTC, committed by David S. Miller on 18 October 2019, 17:00:07 UTC 
net: bcmgenet: reset 40nm EPHY on energy detect
 
The EPHY integrated into the 40nm Set-Top Box devices can falsely
detect energy when connected to a disabled peer interface. When the
peer interface is enabled the EPHY will detect and report the link
as active, but on occasion may get into a state where it is not
able to exchange data with the connected GENET MAC. This issue has
not been observed when the link parameters are auto-negotiated;
however, it has been observed with a manually configured link.

It has been empirically determined that issuing a soft reset to the
EPHY when energy is detected prevents it from getting into this bad
state.

Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 1f51548
History
Tip revision: 25382b991d252aed961cd434176240f9de6bb15f authored by Doug Berger on 16 October 2019, 23:06:32 UTC
net: bcmgenet: reset 40nm EPHY on energy detect
Tip revision: 25382b9
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.clang-format -rw-r--r-- 15.0 KB
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 71 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.7 KB
.mailmap -rw-r--r-- 13.1 KB
COPYING -rw-r--r-- 423 bytes
CREDITS -rw-r--r-- 97.1 KB
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Kconfig -rw-r--r-- 595 bytes
MAINTAINERS -rw-r--r-- 516.8 KB
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