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octeon: honor disabled sgmii device tree nodes

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adds patch to octeon ethernet driver that lets sgmii interface
device tree node to be disabled and that disabled interface
won't be unnecessarily initialized.

It solves the problem with octeon boards that have 8 sgmii or more ports
initialized but have nothing connected to them.

Tested-by: Johannes Kimmel <fff@bareminimum.eu>
Signed-off-by: Roman Kuzmitskii <damex.pp@icloud.com>
This commit is contained in:
Roman Kuzmitskii 2020-11-01 20:46:05 +00:00 committed by Daniel Golle
parent a8ceda752c
commit 577ac8ce84
1 changed files with 27 additions and 0 deletions
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27
target/linux/octeon/patches-5.4/701-honor_sgmii_node_device_tree_status.patch Normal file
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From: Roman Kuzmitskii <damex.pp@icloud.com>
Date: Sun, 01 Nov 2020 19:00:00 +0000
Subject: [PATCH] staging: octeon: sgmii to honor disabled dt node status
With this patch, sgmii interface device tree node could be disabled and
that disabled interface will not be unnecessarily initialized.
It solves the problem with Octeon boards that have 8 sgmii or more ports
initialized but have nothing connected to them.
Tested-by: Johannes Kimmel <fff@bareminimum.eu>
Signed-off-by: Roman Kuzmitskii <damex.pp@icloud.com>
--- a/drivers/staging/octeon/ethernet.c
+++ b/drivers/staging/octeon/ethernet.c
@@ -884,8 +884,10 @@
case CVMX_HELPER_INTERFACE_MODE_SGMII:
priv->phy_mode = PHY_INTERFACE_MODE_SGMII;
- dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
- strscpy(dev->name, "eth%d", sizeof(dev->name));
+ if (of_device_is_available(priv->of_node)) {
+ dev->netdev_ops = &cvm_oct_sgmii_netdev_ops;
+ strscpy(dev->name, "eth%d", sizeof(dev->name));
+ }
break;
case CVMX_HELPER_INTERFACE_MODE_SPI: