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ramips: mt7620: remove useless GMAC nodes

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These nodes are used for configuring a GMAC interface
and for defining external PHYs to be accessed with MDIO.

None of this is possible on MT7620N, only MT7620A,
so remove them from all MT7620N DTS.

When the mdio-bus node is missing, the driver returns -NODEV
which causes the internal switch to not initialize.
Replace that return so that everything works without the DTS node.

Also, an extra kernel message to indicate for all error conditions
that mdio-bus is disabled.

Fixes: d482356322 ("ramips: mt7620n: add mdio node and disable port4 by default")
Fixes: aa5014dd1a ("ramips: mt7620n: enable port 4 as EPHY by default")
Signed-off-by: Michael Pratt <mcpratt@pm.me>
This commit is contained in:
Michael Pratt 2021-06-11 14:54:43 -04:00 committed by Chuanhong Guo
parent 953bfe2eb3
commit a2acdf9607
4 changed files with 4 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
target/linux/ramips/dts/mt7620n.dtsi
View File

@ -322,20 +322,6 @@
reset-names = "fe", "esw";
mediatek,switch = <&gsw>;
mdio-bus {
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
};
port@4 {
compatible = "mediatek,mt7620a-gsw-port", "mediatek,eth-port";
reg = <4>;
status = "disabled";
};
};
gsw: gsw@10110000 {

6
target/linux/ramips/dts/mt7620n_dlink_dwr-921-c1.dts
View File

@ -133,12 +133,6 @@
status = "okay";
};
&ethernet {
port@4 {
status = "okay";
};
};
&state_default {
default {
groups = "spi refclk", "i2c", "ephy", "wled";

6
target/linux/ramips/dts/mt7620n_dlink_dwr-922-e2.dts
View File

@ -136,12 +136,6 @@
status = "okay";
};
&ethernet {
port@4 {
status = "okay";
};
};
&state_default {
default {
groups = "spi refclk", "i2c", "ephy", "wled";

5
target/linux/ramips/files/drivers/net/ethernet/ralink/mdio.c
View File

@ -232,7 +232,8 @@ int fe_mdio_init(struct fe_priv *priv)
mii_np = of_get_child_by_name(priv->dev->of_node, "mdio-bus");
if (!mii_np) {
dev_err(priv->dev, "no %s child node found", "mdio-bus");
return -ENODEV;
err = 0;
goto err_no_bus;
}
if (!of_device_is_available(mii_np)) {
@ -264,6 +265,8 @@ err_free_bus:
kfree(priv->mii_bus);
err_put_node:
of_node_put(mii_np);
err_no_bus:
dev_err(priv->dev, "%s disabled", "mdio-bus");
priv->mii_bus = NULL;
return err;
}