From 173c66bf9c0cfefd0ff69f0939c95900340d0988 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Sun, 14 Mar 2021 20:14:46 +0800 Subject: of: extra: Introduce ofnode_phy_is_fixed_link() API Introduce a helper API ofnode_phy_is_fixed_link() to detect whether the ethernet controller connects to a fixed-link pseudo-PHY device. Note there are two ways to describe a fixed PHY attached to an Ethernet device: - the new DT binding, where 'fixed-link' is a sub-node of the Ethernet device - the old DT binding, where 'fixed-link' is a property with 5 cells encoding various information about the fixed PHY Signed-off-by: Bin Meng Reviewed-by: Simon Glass Reviewed-by: Vladimir Oltean Reviewed-by: Priyanka Jain --- drivers/core/of_extra.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/core/of_extra.c') diff --git a/drivers/core/of_extra.c b/drivers/core/of_extra.c index 653344529e..7702beff97 100644 --- a/drivers/core/of_extra.c +++ b/drivers/core/of_extra.c @@ -130,3 +130,26 @@ int ofnode_decode_memory_region(ofnode config_node, const char *mem_type, return 0; } + +bool ofnode_phy_is_fixed_link(ofnode eth_node, ofnode *phy_node) +{ + ofnode node, subnode; + int len; + + subnode = ofnode_find_subnode(eth_node, "fixed-link"); + if (ofnode_valid(subnode)) { + /* new binding */ + node = subnode; + } else if (ofnode_get_property(eth_node, "fixed-link", &len) && + len == (5 * sizeof(__be32))) { + /* old binding */ + node = eth_node; + } else { + return false; + } + + if (phy_node) + *phy_node = node; + + return true; +} -- cgit v1.2.3