diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/phy/dp83867.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c index 94cc278b3136..1b01680987c4 100644 --- a/drivers/net/phy/dp83867.c +++ b/drivers/net/phy/dp83867.c @@ -65,6 +65,7 @@ struct dp83867_private { int rx_id_delay; int tx_id_delay; int fifo_depth; + int values_are_sane; }; static int dp83867_ack_interrupt(struct phy_device *phydev) @@ -113,15 +114,30 @@ static int dp83867_of_init(struct phy_device *phydev) ret = of_property_read_u32(of_node, "ti,rx-internal-delay", &dp83867->rx_id_delay); if (ret) - return ret; + goto invalid_dt; ret = of_property_read_u32(of_node, "ti,tx-internal-delay", &dp83867->tx_id_delay); if (ret) - return ret; + goto invalid_dt; - return of_property_read_u32(of_node, "ti,fifo-depth", + ret = of_property_read_u32(of_node, "ti,fifo-depth", &dp83867->fifo_depth); + if (ret) + goto invalid_dt; + + dp83867->values_are_sane = 1; + + return 0; + +invalid_dt: + phydev_err(phydev, "missing properties in device tree"); + + /* + * We can still run with a broken dt by not using any of the optional + * parameters, so just don't set dp83867->values_are_sane. + */ + return 0; } #else static int dp83867_of_init(struct phy_device *phydev) @@ -150,6 +166,15 @@ static int dp83867_config_init(struct phy_device *phydev) dp83867 = (struct dp83867_private *)phydev->priv; } + /* + * With no or broken device tree, we don't have the values that we would + * want to configure the phy with. In that case, cross our fingers and + * assume that firmware did everything correctly for us or that we don't + * need them. + */ + if (!dp83867->values_are_sane) + return 0; + if (phy_interface_is_rgmii(phydev)) { ret = phy_write(phydev, MII_DP83867_PHYCTRL, (dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT)); |