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| author | David Bauer <mail@david-bauer.net> | 2018-08-06 16:15:04 +0200 |
|---|---|---|
| committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2018-09-03 23:04:46 +0200 |
| commit | 3444638a05abf7456bb86823c33d651183bd137e (patch) | |
| tree | df3ad7fea13e812957e0f16d57ddc4e3d39899b9 /target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h | |
| parent | a662d6f6bcdcfd42713d4f4dc2d30698e451d280 (diff) | |
| download | upstream-3444638a05abf7456bb86823c33d651183bd137e.tar.gz upstream-3444638a05abf7456bb86823c33d651183bd137e.tar.bz2 upstream-3444638a05abf7456bb86823c33d651183bd137e.zip | |
ar71xx: fix QCA955X SGMII link loss
The QCA955X is affected by a hardware bug which causes link-loss of the
SGMII link between SoC and PHY. This happens on change of link-state or
speed.
It is not really known what causes this bug. It definitely occurs when
using a AR8033 Gigabit Ethernet PHY.
Qualcomm solves this Bug in a similar fashion. We need to apply the fix
on a per-device base via platform-data as performing the fixup work will
break connectivity in case the SGMII interface is connected to a Switch.
This bug was first proposed to be fixed by Sven Eckelmann in 2016.
https://patchwork.ozlabs.org/patch/604782/
Based-on-patch-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit f4f99ec9737c653815268f2efad0210caaa32e2d)
Diffstat (limited to 'target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h index 77ee5b36ec..2d9a865043 100644 --- a/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h +++ b/target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h @@ -66,6 +66,8 @@ #define AG71XX_TX_RING_SIZE_MAX 128 #define AG71XX_RX_RING_SIZE_MAX 256 +#define QCA955X_SGMII_LINK_WAR_MAX_TRY 10 + #ifdef CONFIG_AG71XX_DEBUG #define DBG(fmt, args...) pr_debug(fmt, ## args) #else |