This is a note to let you know that I've just added the patch titled
net: macb: Properly handle phylink on at91sam9x
to the 5.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-macb-properly-handle-phylink-on-at91sam9x.patch
and it can be found in the queue-5.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon 10 Aug 2020 02:00:10 PM CEST
From: Stefan Roese <sr@xxxxxxx>
Date: Tue, 4 Aug 2020 14:17:16 +0200
Subject: net: macb: Properly handle phylink on at91sam9x
From: Stefan Roese <sr@xxxxxxx>
[ Upstream commit f7ba7dbf4f7af67b5936ff1cbd40a3254b409ebf ]
I just recently noticed that ethernet does not work anymore since v5.5
on the GARDENA smart Gateway, which is based on the AT91SAM9G25.
Debugging showed that the "GEM bits" in the NCFGR register are now
unconditionally accessed, which is incorrect for the !macb_is_gem()
case.
This patch adds the macb_is_gem() checks back to the code
(in macb_mac_config() & macb_mac_link_up()), so that the GEM register
bits are not accessed in this case any more.
Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Signed-off-by: Stefan Roese <sr@xxxxxxx>
Cc: Reto Schneider <reto.schneider@xxxxxxxxxxxxxxxxxx>
Cc: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Cc: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/cadence/macb_main.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -578,7 +578,7 @@ static void macb_mac_config(struct phyli
if (bp->caps & MACB_CAPS_MACB_IS_EMAC) {
if (state->interface == PHY_INTERFACE_MODE_RMII)
ctrl |= MACB_BIT(RM9200_RMII);
- } else {
+ } else if (macb_is_gem(bp)) {
ctrl &= ~(GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL));
if (state->interface == PHY_INTERFACE_MODE_SGMII)
@@ -639,10 +639,13 @@ static void macb_mac_link_up(struct phyl
ctrl |= MACB_BIT(FD);
if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC)) {
- ctrl &= ~(GEM_BIT(GBE) | MACB_BIT(PAE));
-
- if (speed == SPEED_1000)
- ctrl |= GEM_BIT(GBE);
+ ctrl &= ~MACB_BIT(PAE);
+ if (macb_is_gem(bp)) {
+ ctrl &= ~GEM_BIT(GBE);
+
+ if (speed == SPEED_1000)
+ ctrl |= GEM_BIT(GBE);
+ }
/* We do not support MLO_PAUSE_RX yet */
if (tx_pause)
Patches currently in stable-queue which might be from sr@xxxxxxx are
queue-5.7/net-macb-properly-handle-phylink-on-at91sam9x.patch
