diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0380-net-phylink-add-support-for-polling-MAC-PCS.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0380-net-phylink-add-support-for-polling-MAC-PCS.patch | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0380-net-phylink-add-support-for-polling-MAC-PCS.patch b/target/linux/layerscape/patches-5.4/701-net-0380-net-phylink-add-support-for-polling-MAC-PCS.patch new file mode 100644 index 0000000000..f9b97b3f4e --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0380-net-phylink-add-support-for-polling-MAC-PCS.patch @@ -0,0 +1,74 @@ +From c12db737cf62ca262c01ec6d4ba942b34db35d8b Mon Sep 17 00:00:00 2001 +From: Vladimir Oltean <vladimir.oltean@nxp.com> +Date: Fri, 27 Dec 2019 19:45:22 +0200 +Subject: [PATCH] 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> +[rebase] +Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> + +Conflicts: + drivers/net/phy/phylink.c + +with upstream commit 24cf0e693bb5 ("net: phylink: split link_an_mode +configured and current settings") submitted for net-next and merged +during v5.5-rc1. +--- + Documentation/networking/sfp-phylink.rst | 3 ++- + drivers/net/phy/phylink.c | 3 ++- + include/linux/phylink.h | 2 ++ + 3 files changed, 6 insertions(+), 2 deletions(-) + +--- 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:: + +--- a/drivers/net/phy/phylink.c ++++ b/drivers/net/phy/phylink.c +@@ -1008,7 +1008,8 @@ void phylink_start(struct phylink *pl) + if (irq <= 0) + mod_timer(&pl->link_poll, jiffies + HZ); + } +- if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->get_fixed_state) ++ if ((pl->cfg_link_an_mode == MLO_AN_FIXED && pl->get_fixed_state) || ++ pl->config->pcs_poll) + mod_timer(&pl->link_poll, jiffies + HZ); + if (pl->phydev) + phy_start(pl->phydev); +--- a/include/linux/phylink.h ++++ b/include/linux/phylink.h +@@ -63,10 +63,12 @@ enum phylink_op_type { + * struct phylink_config - PHYLINK configuration structure + * @dev: a pointer to a struct device associated with the MAC + * @type: operation type of PHYLINK instance ++ * @pcs_poll: MAC PCS cannot provide link change interrupt + */ + struct phylink_config { + struct device *dev; + enum phylink_op_type type; ++ bool pcs_poll; + }; + + /** |