diff options
Diffstat (limited to 'drivers/net/phy/microchip.c')
| -rw-r--r-- | drivers/net/phy/microchip.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/phy/microchip.c b/drivers/net/phy/microchip.c index dc8634e7bcbe..53f6f7c89237 100644 --- a/drivers/net/phy/microchip.c +++ b/drivers/net/phy/microchip.c @@ -198,6 +198,7 @@ static int lan88xx_probe(struct phy_device *phydev) struct device *dev = &phydev->mdio.dev; struct lan88xx_priv *priv; u32 led_modes[4]; + u32 downshift_after = 0; int len; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); @@ -227,6 +228,32 @@ static int lan88xx_probe(struct phy_device *phydev) return -EINVAL; } + if (!of_property_read_u32(dev->of_node, + "microchip,downshift-after", + &downshift_after)) { + u32 mask = LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_MASK; + u32 val= LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT; + + switch (downshift_after) { + case 2: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_2; + break; + case 3: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_3; + break; + case 4: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_4; + break; + case 5: val |= LAN78XX_PHY_CTRL3_DOWNSHIFT_CTRL_5; + break; + case 0: // Disable completely + mask = LAN78XX_PHY_CTRL3_AUTO_DOWNSHIFT; + val = 0; + break; + default: + return -EINVAL; + } + (void)phy_modify_paged(phydev, 1, LAN78XX_PHY_CTRL3, + mask, val); + } + /* these values can be used to identify internal PHY */ priv->chip_id = phy_read_mmd(phydev, 3, LAN88XX_MMD3_CHIP_ID); priv->chip_rev = phy_read_mmd(phydev, 3, LAN88XX_MMD3_CHIP_REV); |