path: root/Documentation/networking/sfp-phylink.rst
diff options
authorVladimir Oltean <vladimir.oltean@nxp.com>2020-01-06 03:34:11 +0200
committerDavid S. Miller <davem@davemloft.net>2020-01-05 23:22:32 -0800
commit1511ed0a0167f523a84b4e727372a5d2ce1b6c2f (patch)
treee51c2ad948a584c83523c85e1f612b1c7b0bd38e /Documentation/networking/sfp-phylink.rst
parentnet: phylink: make QSGMII a valid PHY mode for in-band AN (diff)
net: phylink: add support for polling MAC PCS
Some MAC PCS blocks are unable to provide interrupts when their status changes. As we already have support in phylink for polling status, use this to provide a hook for MACs to enable polling mode. The patch idea was picked up from Russell King's suggestion on the macb phylink patch thread here [0] but the implementation was changed. Instead of introducing a new phylink_start_poll() function, which would make the implementation cumbersome for common PHYLINK implementations for multiple types of devices, like DSA, just add a boolean property to the phylink_config structure, which is just as backwards-compatible. https://lkml.org/lkml/2019/12/16/603 Suggested-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/sfp-phylink.rst')
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/networking/sfp-phylink.rst b/Documentation/networking/sfp-phylink.rst
index a5e00a159d21..d753a309f9d1 100644
--- a/Documentation/networking/sfp-phylink.rst
+++ b/Documentation/networking/sfp-phylink.rst
@@ -251,7 +251,8 @@ this documentation.
phylink_mac_change(priv->phylink, link_is_up);
where ``link_is_up`` is true if the link is currently up or false
- otherwise.
+ otherwise. If a MAC is unable to provide these interrupts, then
+ it should set ``priv->phylink_config.pcs_poll = true;`` in step 9.
11. Verify that the driver does not call::