Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 652 insertions, 0 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns_mdio.c b/drivers/net/ethernet/hisilicon/hns_mdio.c
new file mode 100644
index 0000000000..409a89d802
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns_mdio.c
@@ -0,0 +1,652 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2014-2015 Hisilicon Limited.
+ */
+
+#include <linux/acpi.h>
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/netdevice.h>
+#include <linux/of_address.h>
+#include <linux/of.h>
+#include <linux/of_mdio.h>
+#include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MDIO_DRV_NAME "Hi-HNS_MDIO"
+#define MDIO_BUS_NAME "Hisilicon MII Bus"
+
+#define MDIO_TIMEOUT			1000000
+
+struct hns_mdio_sc_reg {
+	u16 mdio_clk_en;
+	u16 mdio_clk_dis;
+	u16 mdio_reset_req;
+	u16 mdio_reset_dreq;
+	u16 mdio_clk_st;
+	u16 mdio_reset_st;
+};
+
+struct hns_mdio_device {
+	u8 __iomem *vbase;		/* mdio reg base address */
+	struct regmap *subctrl_vbase;
+	struct hns_mdio_sc_reg sc_reg;
+};
+
+/* mdio reg */
+#define MDIO_COMMAND_REG		0x0
+#define MDIO_ADDR_REG			0x4
+#define MDIO_WDATA_REG			0x8
+#define MDIO_RDATA_REG			0xc
+#define MDIO_STA_REG			0x10
+
+/* cfg phy bit map */
+#define MDIO_CMD_DEVAD_M	0x1f
+#define MDIO_CMD_DEVAD_S	0
+#define MDIO_CMD_PRTAD_M	0x1f
+#define MDIO_CMD_PRTAD_S	5
+#define MDIO_CMD_OP_S		10
+#define MDIO_CMD_ST_S		12
+#define MDIO_CMD_START_B	14
+
+#define MDIO_ADDR_DATA_M	0xffff
+#define MDIO_ADDR_DATA_S	0
+
+#define MDIO_WDATA_DATA_M	0xffff
+#define MDIO_WDATA_DATA_S	0
+
+#define MDIO_RDATA_DATA_M	0xffff
+#define MDIO_RDATA_DATA_S	0
+
+#define MDIO_STATE_STA_B	0
+
+enum mdio_st_clause {
+	MDIO_ST_CLAUSE_45 = 0,
+	MDIO_ST_CLAUSE_22
+};
+
+enum mdio_c22_op_seq {
+	MDIO_C22_WRITE = 1,
+	MDIO_C22_READ = 2
+};
+
+enum mdio_c45_op_seq {
+	MDIO_C45_WRITE_ADDR = 0,
+	MDIO_C45_WRITE_DATA,
+	MDIO_C45_READ_INCREMENT,
+	MDIO_C45_READ
+};
+
+/* peri subctrl reg */
+#define MDIO_SC_CLK_EN		0x338
+#define MDIO_SC_CLK_DIS		0x33C
+#define MDIO_SC_RESET_REQ	0xA38
+#define MDIO_SC_RESET_DREQ	0xA3C
+#define MDIO_SC_CLK_ST		0x531C
+#define MDIO_SC_RESET_ST	0x5A1C
+
+static void mdio_write_reg(u8 __iomem *base, u32 reg, u32 value)
+{
+	writel_relaxed(value, base + reg);
+}
+
+#define MDIO_WRITE_REG(a, reg, value) \
+	mdio_write_reg((a)->vbase, (reg), (value))
+
+static u32 mdio_read_reg(u8 __iomem *base, u32 reg)
+{
+	return readl_relaxed(base + reg);
+}
+
+#define mdio_set_field(origin, mask, shift, val) \
+	do { \
+		(origin) &= (~((mask) << (shift))); \
+		(origin) |= (((val) & (mask)) << (shift)); \
+	} while (0)
+
+#define mdio_get_field(origin, mask, shift) (((origin) >> (shift)) & (mask))
+
+static void mdio_set_reg_field(u8 __iomem *base, u32 reg, u32 mask, u32 shift,
+			       u32 val)
+{
+	u32 origin = mdio_read_reg(base, reg);
+
+	mdio_set_field(origin, mask, shift, val);
+	mdio_write_reg(base, reg, origin);
+}
+
+#define MDIO_SET_REG_FIELD(dev, reg, mask, shift, val) \
+	mdio_set_reg_field((dev)->vbase, (reg), (mask), (shift), (val))
+
+static u32 mdio_get_reg_field(u8 __iomem *base, u32 reg, u32 mask, u32 shift)
+{
+	u32 origin;
+
+	origin = mdio_read_reg(base, reg);
+	return mdio_get_field(origin, mask, shift);
+}
+
+#define MDIO_GET_REG_FIELD(dev, reg, mask, shift) \
+		mdio_get_reg_field((dev)->vbase, (reg), (mask), (shift))
+
+#define MDIO_GET_REG_BIT(dev, reg, bit) \
+		mdio_get_reg_field((dev)->vbase, (reg), 0x1ull, (bit))
+
+#define MDIO_CHECK_SET_ST	1
+#define MDIO_CHECK_CLR_ST	0
+
+static int mdio_sc_cfg_reg_write(struct hns_mdio_device *mdio_dev,
+				 u32 cfg_reg, u32 set_val,
+				 u32 st_reg, u32 st_msk, u8 check_st)
+{
+	u32 time_cnt;
+	u32 reg_value;
+	int ret;
+
+	regmap_write(mdio_dev->subctrl_vbase, cfg_reg, set_val);
+
+	for (time_cnt = MDIO_TIMEOUT; time_cnt; time_cnt--) {
+		ret = regmap_read(mdio_dev->subctrl_vbase, st_reg, &reg_value);
+		if (ret)
+			return ret;
+
+		reg_value &= st_msk;
+		if ((!!check_st) == (!!reg_value))
+			break;
+	}
+
+	if ((!!check_st) != (!!reg_value))
+		return -EBUSY;
+
+	return 0;
+}
+
+static int hns_mdio_wait_ready(struct mii_bus *bus)
+{
+	struct hns_mdio_device *mdio_dev = bus->priv;
+	u32 cmd_reg_value;
+	int i;
+
+	/* waiting for MDIO_COMMAND_REG's mdio_start==0 */
+	/* after that can do read or write*/
+	for (i = 0; i < MDIO_TIMEOUT; i++) {
+		cmd_reg_value = MDIO_GET_REG_BIT(mdio_dev,
+						 MDIO_COMMAND_REG,
+						 MDIO_CMD_START_B);
+		if (!cmd_reg_value)
+			break;
+	}
+	if ((i == MDIO_TIMEOUT) && cmd_reg_value)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static void hns_mdio_cmd_write(struct hns_mdio_device *mdio_dev,
+			       u8 is_c45, u8 op, u8 phy_id, u16 cmd)
+{
+	u32 cmd_reg_value;
+	u8 st = is_c45 ? MDIO_ST_CLAUSE_45 : MDIO_ST_CLAUSE_22;
+
+	cmd_reg_value = st << MDIO_CMD_ST_S;
+	cmd_reg_value |= op << MDIO_CMD_OP_S;
+	cmd_reg_value |=
+		(phy_id & MDIO_CMD_PRTAD_M) << MDIO_CMD_PRTAD_S;
+	cmd_reg_value |= (cmd & MDIO_CMD_DEVAD_M) << MDIO_CMD_DEVAD_S;
+	cmd_reg_value |= 1 << MDIO_CMD_START_B;
+
+	MDIO_WRITE_REG(mdio_dev, MDIO_COMMAND_REG, cmd_reg_value);
+}
+
+/**
+ * hns_mdio_write_c22 - access phy register
+ * @bus: mdio bus
+ * @phy_id: phy id
+ * @regnum: register num
+ * @data: register value
+ *
+ * Return 0 on success, negative on failure
+ */
+static int hns_mdio_write_c22(struct mii_bus *bus,
+			      int phy_id, int regnum, u16 data)
+{
+	struct hns_mdio_device *mdio_dev = bus->priv;
+	u16 reg = (u16)(regnum & 0xffff);
+	u16 cmd_reg_cfg;
+	int ret;
+	u8 op;
+
+	dev_dbg(&bus->dev, "mdio write %s,base is %p\n",
+		bus->id, mdio_dev->vbase);
+	dev_dbg(&bus->dev, "phy id=%d, reg=%#x, write data=%d\n",
+		phy_id, reg, data);
+
+	/* wait for ready */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	cmd_reg_cfg = reg;
+	op = MDIO_C22_WRITE;
+
+	MDIO_SET_REG_FIELD(mdio_dev, MDIO_WDATA_REG, MDIO_WDATA_DATA_M,
+			   MDIO_WDATA_DATA_S, data);
+
+	hns_mdio_cmd_write(mdio_dev, false, op, phy_id, cmd_reg_cfg);
+
+	return 0;
+}
+
+/**
+ * hns_mdio_write_c45 - access phy register
+ * @bus: mdio bus
+ * @phy_id: phy id
+ * @devad: device address to read
+ * @regnum: register num
+ * @data: register value
+ *
+ * Return 0 on success, negative on failure
+ */
+static int hns_mdio_write_c45(struct mii_bus *bus, int phy_id, int devad,
+			      int regnum, u16 data)
+{
+	struct hns_mdio_device *mdio_dev = bus->priv;
+	u16 reg = (u16)(regnum & 0xffff);
+	u16 cmd_reg_cfg;
+	int ret;
+	u8 op;
+
+	dev_dbg(&bus->dev, "mdio write %s,base is %p\n",
+		bus->id, mdio_dev->vbase);
+	dev_dbg(&bus->dev, "phy id=%d, devad=%d, reg=%#x, write data=%d\n",
+		phy_id, devad, reg, data);
+
+	/* wait for ready */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	/* config the cmd-reg to write addr*/
+	MDIO_SET_REG_FIELD(mdio_dev, MDIO_ADDR_REG, MDIO_ADDR_DATA_M,
+			   MDIO_ADDR_DATA_S, reg);
+
+	hns_mdio_cmd_write(mdio_dev, true, MDIO_C45_WRITE_ADDR, phy_id, devad);
+
+	/* check for read or write opt is finished */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	/* config the data needed writing */
+	cmd_reg_cfg = devad;
+	op = MDIO_C45_WRITE_DATA;
+
+	MDIO_SET_REG_FIELD(mdio_dev, MDIO_WDATA_REG, MDIO_WDATA_DATA_M,
+			   MDIO_WDATA_DATA_S, data);
+
+	hns_mdio_cmd_write(mdio_dev, true, op, phy_id, cmd_reg_cfg);
+
+	return 0;
+}
+
+/**
+ * hns_mdio_read_c22 - access phy register
+ * @bus: mdio bus
+ * @phy_id: phy id
+ * @regnum: register num
+ *
+ * Return phy register value
+ */
+static int hns_mdio_read_c22(struct mii_bus *bus, int phy_id, int regnum)
+{
+	struct hns_mdio_device *mdio_dev = bus->priv;
+	u16 reg = (u16)(regnum & 0xffff);
+	u16 reg_val;
+	int ret;
+
+	dev_dbg(&bus->dev, "mdio read %s,base is %p\n",
+		bus->id, mdio_dev->vbase);
+	dev_dbg(&bus->dev, "phy id=%d, reg=%#x!\n", phy_id, reg);
+
+	/* Step 1: wait for ready */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	hns_mdio_cmd_write(mdio_dev, false, MDIO_C22_READ, phy_id, reg);
+
+	/* Step 2: waiting for MDIO_COMMAND_REG 's mdio_start==0,*/
+	/* check for read or write opt is finished */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	reg_val = MDIO_GET_REG_BIT(mdio_dev, MDIO_STA_REG, MDIO_STATE_STA_B);
+	if (reg_val) {
+		dev_err(&bus->dev, " ERROR! MDIO Read failed!\n");
+		return -EBUSY;
+	}
+
+	/* Step 3; get out data*/
+	reg_val = (u16)MDIO_GET_REG_FIELD(mdio_dev, MDIO_RDATA_REG,
+					  MDIO_RDATA_DATA_M, MDIO_RDATA_DATA_S);
+
+	return reg_val;
+}
+
+/**
+ * hns_mdio_read_c45 - access phy register
+ * @bus: mdio bus
+ * @phy_id: phy id
+ * @devad: device address to read
+ * @regnum: register num
+ *
+ * Return phy register value
+ */
+static int hns_mdio_read_c45(struct mii_bus *bus, int phy_id, int devad,
+			     int regnum)
+{
+	struct hns_mdio_device *mdio_dev = bus->priv;
+	u16 reg = (u16)(regnum & 0xffff);
+	u16 reg_val;
+	int ret;
+
+	dev_dbg(&bus->dev, "mdio read %s,base is %p\n",
+		bus->id, mdio_dev->vbase);
+	dev_dbg(&bus->dev, "phy id=%d, devad=%d, reg=%#x!\n",
+		phy_id, devad, reg);
+
+	/* Step 1: wait for ready */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	MDIO_SET_REG_FIELD(mdio_dev, MDIO_ADDR_REG, MDIO_ADDR_DATA_M,
+			   MDIO_ADDR_DATA_S, reg);
+
+	/* Step 2; config the cmd-reg to write addr*/
+	hns_mdio_cmd_write(mdio_dev, true, MDIO_C45_WRITE_ADDR, phy_id, devad);
+
+	/* Step 3: check for read or write opt is finished */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	hns_mdio_cmd_write(mdio_dev, true, MDIO_C45_READ, phy_id, devad);
+
+	/* Step 5: waiting for MDIO_COMMAND_REG 's mdio_start==0,*/
+	/* check for read or write opt is finished */
+	ret = hns_mdio_wait_ready(bus);
+	if (ret) {
+		dev_err(&bus->dev, "MDIO bus is busy\n");
+		return ret;
+	}
+
+	reg_val = MDIO_GET_REG_BIT(mdio_dev, MDIO_STA_REG, MDIO_STATE_STA_B);
+	if (reg_val) {
+		dev_err(&bus->dev, " ERROR! MDIO Read failed!\n");
+		return -EBUSY;
+	}
+
+	/* Step 6; get out data*/
+	reg_val = (u16)MDIO_GET_REG_FIELD(mdio_dev, MDIO_RDATA_REG,
+					  MDIO_RDATA_DATA_M, MDIO_RDATA_DATA_S);
+
+	return reg_val;
+}
+
+/**
+ * hns_mdio_reset - reset mdio bus
+ * @bus: mdio bus
+ *
+ * Return 0 on success, negative on failure
+ */
+static int hns_mdio_reset(struct mii_bus *bus)
+{
+	struct hns_mdio_device *mdio_dev = bus->priv;
+	const struct hns_mdio_sc_reg *sc_reg;
+	int ret;
+
+	if (dev_of_node(bus->parent)) {
+		if (!mdio_dev->subctrl_vbase) {
+			dev_err(&bus->dev, "mdio sys ctl reg has not mapped\n");
+			return -ENODEV;
+		}
+
+		sc_reg = &mdio_dev->sc_reg;
+		/* 1. reset req, and read reset st check */
+		ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_reset_req,
+					    0x1, sc_reg->mdio_reset_st, 0x1,
+					    MDIO_CHECK_SET_ST);
+		if (ret) {
+			dev_err(&bus->dev, "MDIO reset fail\n");
+			return ret;
+		}
+
+		/* 2. dis clk, and read clk st check */
+		ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_clk_dis,
+					    0x1, sc_reg->mdio_clk_st, 0x1,
+					    MDIO_CHECK_CLR_ST);
+		if (ret) {
+			dev_err(&bus->dev, "MDIO dis clk fail\n");
+			return ret;
+		}
+
+		/* 3. reset dreq, and read reset st check */
+		ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_reset_dreq,
+					    0x1, sc_reg->mdio_reset_st, 0x1,
+					    MDIO_CHECK_CLR_ST);
+		if (ret) {
+			dev_err(&bus->dev, "MDIO dis clk fail\n");
+			return ret;
+		}
+
+		/* 4. en clk, and read clk st check */
+		ret = mdio_sc_cfg_reg_write(mdio_dev, sc_reg->mdio_clk_en,
+					    0x1, sc_reg->mdio_clk_st, 0x1,
+					    MDIO_CHECK_SET_ST);
+		if (ret)
+			dev_err(&bus->dev, "MDIO en clk fail\n");
+	} else if (is_acpi_node(bus->parent->fwnode)) {
+		acpi_status s;
+
+		s = acpi_evaluate_object(ACPI_HANDLE(bus->parent),
+					 "_RST", NULL, NULL);
+		if (ACPI_FAILURE(s)) {
+			dev_err(&bus->dev, "Reset failed, return:%#x\n", s);
+			ret = -EBUSY;
+		} else {
+			ret = 0;
+		}
+	} else {
+		dev_err(&bus->dev, "Can not get cfg data from DT or ACPI\n");
+		ret = -ENXIO;
+	}
+	return ret;
+}
+
+/**
+ * hns_mdio_probe - probe mdio device
+ * @pdev: mdio platform device
+ *
+ * Return 0 on success, negative on failure
+ */
+static int hns_mdio_probe(struct platform_device *pdev)
+{
+	struct hns_mdio_device *mdio_dev;
+	struct mii_bus *new_bus;
+	int ret;
+
+	if (!pdev) {
+		dev_err(NULL, "pdev is NULL!\r\n");
+		return -ENODEV;
+	}
+
+	mdio_dev = devm_kzalloc(&pdev->dev, sizeof(*mdio_dev), GFP_KERNEL);
+	if (!mdio_dev)
+		return -ENOMEM;
+
+	new_bus = devm_mdiobus_alloc(&pdev->dev);
+	if (!new_bus) {
+		dev_err(&pdev->dev, "mdiobus_alloc fail!\n");
+		return -ENOMEM;
+	}
+
+	new_bus->name = MDIO_BUS_NAME;
+	new_bus->read = hns_mdio_read_c22;
+	new_bus->write = hns_mdio_write_c22;
+	new_bus->read_c45 = hns_mdio_read_c45;
+	new_bus->write_c45 = hns_mdio_write_c45;
+	new_bus->reset = hns_mdio_reset;
+	new_bus->priv = mdio_dev;
+	new_bus->parent = &pdev->dev;
+
+	mdio_dev->vbase = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(mdio_dev->vbase)) {
+		ret = PTR_ERR(mdio_dev->vbase);
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, new_bus);
+	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%s-%s", "Mii",
+		 dev_name(&pdev->dev));
+	if (dev_of_node(&pdev->dev)) {
+		struct of_phandle_args reg_args;
+
+		ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
+						       "subctrl-vbase",
+						       4,
+						       0,
+						       &reg_args);
+		if (!ret) {
+			mdio_dev->subctrl_vbase =
+				syscon_node_to_regmap(reg_args.np);
+			if (IS_ERR(mdio_dev->subctrl_vbase)) {
+				dev_warn(&pdev->dev, "syscon_node_to_regmap error\n");
+				mdio_dev->subctrl_vbase = NULL;
+			} else {
+				if (reg_args.args_count == 4) {
+					mdio_dev->sc_reg.mdio_clk_en =
+						(u16)reg_args.args[0];
+					mdio_dev->sc_reg.mdio_clk_dis =
+						(u16)reg_args.args[0] + 4;
+					mdio_dev->sc_reg.mdio_reset_req =
+						(u16)reg_args.args[1];
+					mdio_dev->sc_reg.mdio_reset_dreq =
+						(u16)reg_args.args[1] + 4;
+					mdio_dev->sc_reg.mdio_clk_st =
+						(u16)reg_args.args[2];
+					mdio_dev->sc_reg.mdio_reset_st =
+						(u16)reg_args.args[3];
+				} else {
+					/* for compatible */
+					mdio_dev->sc_reg.mdio_clk_en =
+						MDIO_SC_CLK_EN;
+					mdio_dev->sc_reg.mdio_clk_dis =
+						MDIO_SC_CLK_DIS;
+					mdio_dev->sc_reg.mdio_reset_req =
+						MDIO_SC_RESET_REQ;
+					mdio_dev->sc_reg.mdio_reset_dreq =
+						MDIO_SC_RESET_DREQ;
+					mdio_dev->sc_reg.mdio_clk_st =
+						MDIO_SC_CLK_ST;
+					mdio_dev->sc_reg.mdio_reset_st =
+						MDIO_SC_RESET_ST;
+				}
+			}
+		} else {
+			dev_warn(&pdev->dev, "find syscon ret = %#x\n", ret);
+			mdio_dev->subctrl_vbase = NULL;
+		}
+
+		ret = of_mdiobus_register(new_bus, pdev->dev.of_node);
+	} else if (is_acpi_node(pdev->dev.fwnode)) {
+		/* Clear all the IRQ properties */
+		memset(new_bus->irq, PHY_POLL, 4 * PHY_MAX_ADDR);
+
+		/* Mask out all PHYs from auto probing. */
+		new_bus->phy_mask = ~0;
+
+		/* Register the MDIO bus */
+		ret = mdiobus_register(new_bus);
+	} else {
+		dev_err(&pdev->dev, "Can not get cfg data from DT or ACPI\n");
+		ret = -ENXIO;
+	}
+
+	if (ret) {
+		dev_err(&pdev->dev, "Cannot register as MDIO bus!\n");
+		platform_set_drvdata(pdev, NULL);
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * hns_mdio_remove - remove mdio device
+ * @pdev: mdio platform device
+ *
+ * Return 0 on success, negative on failure
+ */
+static int hns_mdio_remove(struct platform_device *pdev)
+{
+	struct mii_bus *bus;
+
+	bus = platform_get_drvdata(pdev);
+
+	mdiobus_unregister(bus);
+	platform_set_drvdata(pdev, NULL);
+	return 0;
+}
+
+static const struct of_device_id hns_mdio_match[] = {
+	{.compatible = "hisilicon,mdio"},
+	{.compatible = "hisilicon,hns-mdio"},
+	{}
+};
+MODULE_DEVICE_TABLE(of, hns_mdio_match);
+
+static const struct acpi_device_id hns_mdio_acpi_match[] = {
+	{ "HISI0141", 0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, hns_mdio_acpi_match);
+
+static struct platform_driver hns_mdio_driver = {
+	.probe = hns_mdio_probe,
+	.remove = hns_mdio_remove,
+	.driver = {
+		   .name = MDIO_DRV_NAME,
+		   .of_match_table = hns_mdio_match,
+		   .acpi_match_table = ACPI_PTR(hns_mdio_acpi_match),
+		   },
+};
+
+module_platform_driver(hns_mdio_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
+MODULE_DESCRIPTION("Hisilicon HNS MDIO driver");
+MODULE_ALIAS("platform:" MDIO_DRV_NAME);