phy: core: Fix of_phy_provider_lookup to return PHY provider for sub node

Fixed of_phy_provider_lookup to return 'phy_provider' if _of_phy_get
passes the node pointer of the sub-node of phy provider node. This is
needed when phy provider implements multiple PHYs and each PHY is
modelled as the sub-node of PHY provider device node.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
(cherry picked from commit 2a4c37016ca96e413cd352985d3a0db8cfb7716c)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 59ce9cd..176c443 100644 (file)
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -86,10 +86,15 @@ static struct phy *phy_lookup(struct device *device, const char *port)
 static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
 {
        struct phy_provider *phy_provider;
+       struct device_node *child;
 
        list_for_each_entry(phy_provider, &phy_provider_list, list) {
                if (phy_provider->dev->of_node == node)
                        return phy_provider;
+
+               for_each_child_of_node(phy_provider->dev->of_node, child)
+                       if (child == node)
+                               return phy_provider;
        }
 
        return ERR_PTR(-EPROBE_DEFER);