>Number: 163240
>Category: kern
>Synopsis: Power down PHY when "none" media is selected
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Tue Dec 13 09:40:09 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator: Stefan Bethke
>Release: -current r228399
>Organization:
>Environment:
>Description:
Per discussion on -net, it would be advantageous to power down a PHY when not
in use, so that no link is established to the remote end of the cable.
The patch adds the power-down bit to the bits to be set for the "none" media
selection to the common PHY code, enabling powering down the PHY for the
following PHY drivers:
ac am ax bmt ics lxt ml nsg ns pna qs rdc rl smc tdk tl true uk
>How-To-Repeat:
>Fix:
Index: sys/dev/mii/mii_physubr.c
===================================================================
--- sys/dev/mii/mii_physubr.c (revision 228402)
+++ sys/dev/mii/mii_physubr.c (working copy)
@@ -58,7 +58,7 @@
*/
static const struct mii_media mii_media_table[MII_NMEDIA] = {
/* None */
- { BMCR_ISO, ANAR_CSMA,
+ { BMCR_ISO | BMCR_PDOWN, ANAR_CSMA,
0, },
/* 10baseT */
>Release-Note:
>Audit-Trail:
>Unformatted:
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