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realtek: pcs: select OFF mode with no links on SerDes

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Because the PCS driver keeps track of the number of registered links for
each SerDes now, we now know when there is no link on a SerDes. In this
case, determine to turn off the SerDes in the mode mapper.

Though the phylink subsystem shouldn't attempt to config something
different when no link/port references a Serdes, be on the safe side.

Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21365
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Jonas Jelonek 2026-01-02 18:50:10 +00:00 • committed by Hauke Mehrtens
parent 7cd3407fde
commit b63f68e409
1 changed files with 6 additions and 0 deletions
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6
target/linux/realtek/files-6.12/drivers/net/pcs/pcs-rtl-otto.c
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@ -287,6 +287,12 @@ static int rtpcs_sds_determine_hw_mode(struct rtpcs_serdes *sds,
{
u8 n_links = sds->num_of_links;
/* turn off SerDes when there are no links */
if (!n_links) {
*hw_mode = RTPCS_SDS_MODE_OFF;
return 0;
}
switch (if_mode) {
case PHY_INTERFACE_MODE_NA:
*hw_mode = RTPCS_SDS_MODE_OFF;