From 651df2183543bc92f5dbcf99cd9e236ead0bc4c5 Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Wed, 9 Dec 2015 19:56:31 +0100 Subject: [PATCH] phy: micrel: Fix finding PHY properties in MAC node. commit 8b63ec1837fa ("phylib: Make PHYs children of their MDIO bus, not the bus' parent.") changed the parenting of PHY devices, making them a child of the MDIO bus, instead of the MAC device. This broken the Micrel PHY driver which has a deprecated feature of allowing PHY properties to be placed into the MAC node. In order to find the MAC node, we need to walk up the tree of devices until we find one with an OF node attached. Reported-by: Dinh Nguyen Suggested-by: David Daney Acked-by: David Daney Fixes: 8b63ec1837fa ("phylib: Make PHYs children of their MDIO bus, not the bus' parent.") Signed-off-by: Andrew Lunn Tested-by: Dinh Nguyen Acked-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/phy/micrel.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index cf6312fafea5..e13ad6cdcc22 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -339,9 +339,18 @@ static int ksz9021_config_init(struct phy_device *phydev) { const struct device *dev = &phydev->dev; const struct device_node *of_node = dev->of_node; + const struct device *dev_walker; - if (!of_node && dev->parent->of_node) - of_node = dev->parent->of_node; + /* The Micrel driver has a deprecated option to place phy OF + * properties in the MAC node. Walk up the tree of devices to + * find a device with an OF node. + */ + dev_walker = &phydev->dev; + do { + of_node = dev_walker->of_node; + dev_walker = dev_walker->parent; + + } while (!of_node && dev_walker); if (of_node) { ksz9021_load_values_from_of(phydev, of_node, -- 2.20.1