diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0402-drivers-net-dsa-felix-don-t-restart-PCS-SGMII-AN-if-.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0402-drivers-net-dsa-felix-don-t-restart-PCS-SGMII-AN-if-.patch | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0402-drivers-net-dsa-felix-don-t-restart-PCS-SGMII-AN-if-.patch b/target/linux/layerscape/patches-5.4/701-net-0402-drivers-net-dsa-felix-don-t-restart-PCS-SGMII-AN-if-.patch deleted file mode 100644 index 5008ca5c77..0000000000 --- a/target/linux/layerscape/patches-5.4/701-net-0402-drivers-net-dsa-felix-don-t-restart-PCS-SGMII-AN-if-.patch +++ /dev/null @@ -1,41 +0,0 @@ -From 2a2ccfa44e56c45dfd1230f6efb3ec0a4a677f0a Mon Sep 17 00:00:00 2001 -From: Alex Marginean <alexandru.marginean@nxp.com> -Date: Wed, 15 Jan 2020 15:49:11 +0200 -Subject: [PATCH] drivers: net: dsa: felix: don't restart PCS SGMII AN if not - needed - -Some PHYs like VSC8234 don't like it when AN restarts on their system side -and they restart line side AN too, going into an endless link up/down loop. -Don't restart PCS AN if link is up already. - -Suggested-by: Vladimir Oltean <vladimir.oltean@nxp.com> -Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com> ---- - drivers/net/dsa/ocelot/felix_vsc9959.c | 15 +++++++++++++++ - 1 file changed, 15 insertions(+) - ---- a/drivers/net/dsa/ocelot/felix_vsc9959.c -+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c -@@ -648,7 +648,22 @@ static void vsc9959_pcs_init_sgmii(struc - unsigned int link_an_mode, - const struct phylink_link_state *state) - { -+ int bmsr, bmcr; -+ - if (link_an_mode == MLO_AN_INBAND) { -+ /* Some PHYs like VSC8234 don't like it when AN restarts on -+ * their system side and they restart line side AN too, going -+ * into an endless link up/down loop. Don't restart PCS AN if -+ * link is up already. -+ * We do check that AN is enabled just in case this is the 1st -+ * call, PCS detects a carrier but AN is disabled from power on -+ * or by boot loader. -+ */ -+ bmcr = phy_read(pcs, MII_BMCR); -+ bmsr = phy_read(pcs, MII_BMSR); -+ if ((bmcr & BMCR_ANENABLE) && (bmsr & BMSR_LSTATUS)) -+ return; -+ - /* SGMII spec requires tx_config_Reg[15:0] to be exactly 0x4001 - * for the MAC PCS in order to acknowledge the AN. - */ |