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stmmac: Fix 'eth0: No PHY found' regression 

This patch manages the case when you have an Ethernet MAC with
a "fixed link", and not connected to a normal MDIO-managed PHY device.

The test of phy_bus_name was not helpful because it was never affected
and replaced by the mdio test node.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@linaro.org>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gabriel Fernandez 2016-02-29 17:18:22 +01:00 committed by David S. Miller
parent ebc9780c93
commit 88f8b1bb41
3 changed files with 10 additions and 11 deletions
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11
drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
View File

@ -199,21 +199,12 @@ int stmmac_mdio_register(struct net_device *ndev)
struct stmmac_priv *priv = netdev_priv(ndev);
struct stmmac_mdio_bus_data *mdio_bus_data = priv->plat->mdio_bus_data;
int addr, found;
struct device_node *mdio_node = NULL;
struct device_node *child_node = NULL;
struct device_node *mdio_node = priv->plat->mdio_node;
if (!mdio_bus_data)
return 0;
if (IS_ENABLED(CONFIG_OF)) {
for_each_child_of_node(priv->device->of_node, child_node) {
if (of_device_is_compatible(child_node,
"snps,dwmac-mdio")) {
mdio_node = child_node;
break;
}
}
if (mdio_node) {
netdev_dbg(ndev, "FOUND MDIO subnode\n");
} else {

9
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View File

@ -110,6 +110,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
struct device_node *np = pdev->dev.of_node;
struct plat_stmmacenet_data *plat;
struct stmmac_dma_cfg *dma_cfg;
struct device_node *child_node = NULL;
plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
if (!plat)
@ -140,13 +141,19 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
plat->phy_node = of_node_get(np);
}
for_each_child_of_node(np, child_node)
if (of_device_is_compatible(child_node, "snps,dwmac-mdio")) {
plat->mdio_node = child_node;
break;
}
/* "snps,phy-addr" is not a standard property. Mark it as deprecated
* and warn of its use. Remove this when phy node support is added.
*/
if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
if ((plat->phy_node && !of_phy_is_fixed_link(np)) || plat->phy_bus_name)
if ((plat->phy_node && !of_phy_is_fixed_link(np)) || !plat->mdio_node)
plat->mdio_bus_data = NULL;
else
plat->mdio_bus_data =

1
include/linux/stmmac.h
View File

@ -100,6 +100,7 @@ struct plat_stmmacenet_data {
int interface;
struct stmmac_mdio_bus_data *mdio_bus_data;
struct device_node *phy_node;
struct device_node *mdio_node;
struct stmmac_dma_cfg *dma_cfg;
int clk_csr;
int has_gmac;