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net: hibmcge: support scenario without PHY

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Currently, the driver uses phylib to operate PHY by default.

On some boards, the PHY device is separated from the MAC device.
As a result, the hibmcge driver cannot operate the PHY device.

In this patch, the driver determines whether a PHY is available
based on register configuration. If no PHY is available,
the driver will use fixed_phy to register fake phydev.

Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Larysa Zaremba <larysa.zaremba@intel.com>
Link: https://patch.msgid.link/20250702125716.2875169-2-shaojijie@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jijie Shao
2025-07-02 20:57:14 +08:00
committed by Jakub Kicinski
parent effdbb29fd
commit 1d7cd7a9c6
1 changed files with 38 additions and 0 deletions
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38
drivers/net/ethernet/hisilicon/hibmcge/hbg_mdio.c
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@@ -2,6 +2,7 @@
// Copyright (c) 2024 Hisilicon Limited.
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/rtnetlink.h>
#include "hbg_common.h"
#include "hbg_hw.h"
@@ -19,6 +20,7 @@
#define HBG_MDIO_OP_INTERVAL_US (5 * 1000)
#define HBG_NP_LINK_FAIL_RETRY_TIMES 5
#define HBG_NO_PHY 0xFF
static void hbg_mdio_set_command(struct hbg_mac *mac, u32 cmd)
{
@@ -229,6 +231,39 @@ void hbg_phy_stop(struct hbg_priv *priv)
phy_stop(priv->mac.phydev);
}
static void hbg_fixed_phy_uninit(void *data)
{
fixed_phy_unregister((struct phy_device *)data);
}
static int hbg_fixed_phy_init(struct hbg_priv *priv)
{
struct fixed_phy_status hbg_fixed_phy_status = {
.link = 1,
.speed = SPEED_1000,
.duplex = DUPLEX_FULL,
.pause = 1,
.asym_pause = 1,
};
struct device *dev = &priv->pdev->dev;
struct phy_device *phydev;
int ret;
phydev = fixed_phy_register(&hbg_fixed_phy_status, NULL);
if (IS_ERR(phydev)) {
dev_err_probe(dev, PTR_ERR(phydev),
"failed to register fixed PHY device\n");
return PTR_ERR(phydev);
}
ret = devm_add_action_or_reset(dev, hbg_fixed_phy_uninit, phydev);
if (ret)
return ret;
priv->mac.phydev = phydev;
return hbg_phy_connect(priv);
}
int hbg_mdio_init(struct hbg_priv *priv)
{
struct device *dev = &priv->pdev->dev;
@@ -238,6 +273,9 @@ int hbg_mdio_init(struct hbg_priv *priv)
int ret;
mac->phy_addr = priv->dev_specs.phy_addr;
if (mac->phy_addr == HBG_NO_PHY)
return hbg_fixed_phy_init(priv);
mdio_bus = devm_mdiobus_alloc(dev);
if (!mdio_bus)
return dev_err_probe(dev, -ENOMEM,