55 lines
1.9 KiB
Diff
55 lines
1.9 KiB
Diff
From 45c9d966688e7fad7f24bfc450547d91e4304d0b Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Sat, 2 Oct 2021 19:58:12 +0200
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Subject: [PATCH] net: bgmac: support MDIO described in DT
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Check ethernet controller DT node for "mdio" subnode and use it with
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of_mdiobus_register() when present. That allows specifying MDIO and its
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PHY devices in a standard DT based way.
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This is required for BCM53573 SoC support. That family is sometimes
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called Northstar (by marketing?) but is quite different from it. It uses
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different CPU(s) and many different hw blocks.
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One of shared blocks in BCM53573 is Ethernet controller. Switch however
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is not SRAB accessible (as it Northstar) but is MDIO attached.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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--- a/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
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+++ b/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
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@@ -10,6 +10,7 @@
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#include <linux/bcma/bcma.h>
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#include <linux/brcmphy.h>
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+#include <linux/of_mdio.h>
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#include "bgmac.h"
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static bool bcma_mdio_wait_value(struct bcma_device *core, u16 reg, u32 mask,
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@@ -211,6 +212,7 @@ struct mii_bus *bcma_mdio_mii_register(s
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{
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struct bcma_device *core = bgmac->bcma.core;
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struct mii_bus *mii_bus;
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+ struct device_node *np;
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int err;
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mii_bus = mdiobus_alloc();
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@@ -229,7 +231,9 @@ struct mii_bus *bcma_mdio_mii_register(s
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mii_bus->parent = &core->dev;
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mii_bus->phy_mask = ~(1 << bgmac->phyaddr);
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- err = mdiobus_register(mii_bus);
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+ np = of_get_child_by_name(core->dev.of_node, "mdio");
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+
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+ err = of_mdiobus_register(mii_bus, np);
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if (err) {
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dev_err(&core->dev, "Registration of mii bus failed\n");
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goto err_free_bus;
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