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net: dsa: lantiq: verify compatible strings against hardware

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Verify compatible string against hardware.

Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Aleksander Jan Bajkowski 2021-03-22 21:37:16 +01:00 committed by David S. Miller
parent a09d042b08
commit 204c761473
1 changed files with 19 additions and 1 deletions
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20
drivers/net/dsa/lantiq_gswip.c
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@ -1907,7 +1907,7 @@ static int gswip_gphy_fw_list(struct gswip_priv *priv,
static int gswip_probe(struct platform_device *pdev)
{
struct gswip_priv *priv;
struct device_node *mdio_np, *gphy_fw_np;
struct device_node *np, *mdio_np, *gphy_fw_np;
struct device *dev = &pdev->dev;
int err;
int i;
@ -1944,6 +1944,24 @@ static int gswip_probe(struct platform_device *pdev)
priv->dev = dev;
version = gswip_switch_r(priv, GSWIP_VERSION);
np = dev->of_node;
switch (version) {
case GSWIP_VERSION_2_0:
case GSWIP_VERSION_2_1:
if (!of_device_is_compatible(np, "lantiq,xrx200-gswip"))
return -EINVAL;
break;
case GSWIP_VERSION_2_2:
case GSWIP_VERSION_2_2_ETC:
if (!of_device_is_compatible(np, "lantiq,xrx300-gswip") &&
!of_device_is_compatible(np, "lantiq,xrx330-gswip"))
return -EINVAL;
break;
default:
dev_err(dev, "unknown GSWIP version: 0x%x", version);
return -ENOENT;
}
/* bring up the mdio bus */
gphy_fw_np = of_get_compatible_child(dev->of_node, "lantiq,gphy-fw");
if (gphy_fw_np) {