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 --- include/dm/of_extra.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include') diff --git a/include/dm/of_extra.h b/include/dm/of_extra.h index fc4f9743196..f0d205491c1 100644 --- a/include/dm/of_extra.h +++ b/include/dm/of_extra.h @@ -94,4 +94,24 @@ int ofnode_decode_memory_region(ofnode config_node, const char *mem_type, const char *suffix, fdt_addr_t *basep, fdt_size_t *sizep); +/** + * ofnode_phy_is_fixed_link() - Detect fixed-link pseudo-PHY device + * + * This function detects whether the ethernet controller connects to a + * fixed-link pseudo-PHY device. + * + * This function supports the following two DT bindings: + * - 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 + * + * If both new and old bindings exist, the new one is preferred. + * + * @param eth_node ofnode containing the fixed-link subnode/property + * @param phy_node if fixed-link PHY detected, containing the PHY ofnode + * @return true if a fixed-link pseudo-PHY device exists, false otherwise + */ +bool ofnode_phy_is_fixed_link(ofnode eth_node, ofnode *phy_node); + #endif -- cgit v1.3.1