| From 3eef5888c21f9fabda4112f3918e9a9224e5cf7c Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Wed, 23 Jun 2021 11:28:03 +0800 |
| Subject: net: bcmgenet: Fix attaching to PYH failed on RPi 4B |
| |
| From: Jian-Hong Pan <jhp@endlessos.org> |
| |
| [ Upstream commit b2ac9800cfe0f8da16abc4e74e003440361c112e ] |
| |
| The Broadcom UniMAC MDIO bus from mdio-bcm-unimac module comes too late. |
| So, GENET cannot find the ethernet PHY on UniMAC MDIO bus. This leads |
| GENET fail to attach the PHY as following log: |
| |
| bcmgenet fd580000.ethernet: GENET 5.0 EPHY: 0x0000 |
| ... |
| could not attach to PHY |
| bcmgenet fd580000.ethernet eth0: failed to connect to PHY |
| uart-pl011 fe201000.serial: no DMA platform data |
| libphy: bcmgenet MII bus: probed |
| ... |
| unimac-mdio unimac-mdio.-19: Broadcom UniMAC MDIO bus |
| |
| This patch adds the soft dependency to load mdio-bcm-unimac module |
| before genet module to avoid the issue. |
| |
| Fixes: 9a4e79697009 ("net: bcmgenet: utilize generic Broadcom UniMAC MDIO controller driver") |
| Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=213485 |
| Signed-off-by: Jian-Hong Pan <jhp@endlessos.org> |
| Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| drivers/net/ethernet/broadcom/genet/bcmgenet.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c |
| index fcca023f22e5..41f7f078cd27 100644 |
| --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c |
| +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c |
| @@ -4296,3 +4296,4 @@ MODULE_AUTHOR("Broadcom Corporation"); |
| MODULE_DESCRIPTION("Broadcom GENET Ethernet controller driver"); |
| MODULE_ALIAS("platform:bcmgenet"); |
| MODULE_LICENSE("GPL"); |
| +MODULE_SOFTDEP("pre: mdio-bcm-unimac"); |
| -- |
| 2.30.2 |
| |
