From 12133b11a7ff817fd96210eeb7e84ff9f871e714 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Mon, 6 Dec 2021 14:53:17 +0100 Subject: [PATCH] net: zynq: Add support for mdio bus address decoding Xilinx DTS files are using two way how to describe ethernet phy. The first (already supported) has phy as subnode of gem node. eth { phy-handle = <&phy0>; phy0: ethernet-phy@21 { ... }; }; The second has mdio subnode (with mdio name) which has phy subnode. This structure allow hadling MDIO reset signal (based on Linux mdio.yaml) eth { phy-handle = <&phy0>; mdio { phy0: ethernet-phy@21 { ... }; }; }; This patch adds support for the second case where mdio subnode is found driver will look at its parent to find out which gem is handling MDIO bus. Signed-off-by: Michal Simek Link: https://lore.kernel.org/r/6748007f0b6db9554d7a4b52352dce23ca403f9d.1638798796.git.michal.simek@xilinx.com --- drivers/net/zynq_gem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c index c309c3c..de61321 100644 --- a/drivers/net/zynq_gem.c +++ b/drivers/net/zynq_gem.c @@ -802,6 +802,9 @@ static int zynq_gem_of_to_plat(struct udevice *dev) SPEED_1000); parent = ofnode_get_parent(phandle_args.node); + if (ofnode_name_eq(parent, "mdio")) + parent = ofnode_get_parent(parent); + addr = ofnode_get_addr(parent); if (addr != FDT_ADDR_T_NONE) { debug("MDIO bus not found %s\n", dev->name); -- 2.7.4