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Subject[PATCH v2 09/11] [RFC] net: phylink: Add support for CRS-based rate adaptation
Date
This adds support for CRS-based rate adaptation, such as the type used
for 10PASS-TS and 2BASE-TL. As these link modes are not supported by any
in-tree phy, this patch is marked as RFC. It serves chiefly to
illustrate the approach to adding support for another rate adaptation
type.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
---

(no changes since v1)

drivers/net/phy/phylink.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index f61040c93f3c..75b4994d68c8 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -553,9 +553,18 @@ unsigned long phylink_get_capabilities(phy_interface_t interface,
adapted_caps &= ~(MAC_1000HD | MAC_100HD | MAC_10HD);
break;
}
- case RATE_ADAPT_CRS:
- /* TODO */
+ case RATE_ADAPT_CRS: {
+ /* The MAC must support half duplex at the interface speed */
+ if (state.speed == SPEED_1000) {
+ if (mac_capabilities & MAC_1000HD)
+ adapted_caps = MAC_100 | MAC_10;
+ } else if (state.speed == SPEED_1000) {
+ if (mac_capabilities & MAC_100HD)
+ adapted_caps = MAC_10;
+ }
+ adapted_caps &= mac_capabilities;
break;
+ }
case RATE_ADAPT_OPEN_LOOP:
/* TODO */
break;
--
2.35.1.1320.gc452695387.dirty
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