drivers/net/phy/qcom/qca808x.c

// SPDX-License-Identifier: GPL-2.0+

#include <linux/phy.h>
#include <linux/module.h>

#include "qcom.h"

/* ADC threshold */
#define QCA808X_PHY_DEBUG_ADC_THRESHOLD		0x2c80
#define QCA808X_ADC_THRESHOLD_MASK		GENMASK(7, 0)
#define QCA808X_ADC_THRESHOLD_80MV		0
#define QCA808X_ADC_THRESHOLD_100MV		0xf0
#define QCA808X_ADC_THRESHOLD_200MV		0x0f
#define QCA808X_ADC_THRESHOLD_300MV		0xff

/* CLD control */
#define QCA808X_PHY_MMD3_ADDR_CLD_CTRL7		0x8007
#define QCA808X_8023AZ_AFE_CTRL_MASK		GENMASK(8, 4)
#define QCA808X_8023AZ_AFE_EN			0x90

/* AZ control */
#define QCA808X_PHY_MMD3_AZ_TRAINING_CTRL	0x8008
#define QCA808X_MMD3_AZ_TRAINING_VAL		0x1c32

#define QCA808X_PHY_MMD1_MSE_THRESHOLD_20DB	0x8014
#define QCA808X_MSE_THRESHOLD_20DB_VALUE	0x529

#define QCA808X_PHY_MMD1_MSE_THRESHOLD_17DB	0x800E
#define QCA808X_MSE_THRESHOLD_17DB_VALUE	0x341

#define QCA808X_PHY_MMD1_MSE_THRESHOLD_27DB	0x801E
#define QCA808X_MSE_THRESHOLD_27DB_VALUE	0x419

#define QCA808X_PHY_MMD1_MSE_THRESHOLD_28DB	0x8020
#define QCA808X_MSE_THRESHOLD_28DB_VALUE	0x341

#define QCA808X_PHY_MMD7_TOP_OPTION1		0x901c
#define QCA808X_TOP_OPTION1_DATA		0x0

#define QCA808X_PHY_MMD3_DEBUG_1		0xa100
#define QCA808X_MMD3_DEBUG_1_VALUE		0x9203
#define QCA808X_PHY_MMD3_DEBUG_2		0xa101
#define QCA808X_MMD3_DEBUG_2_VALUE		0x48ad
#define QCA808X_PHY_MMD3_DEBUG_3		0xa103
#define QCA808X_MMD3_DEBUG_3_VALUE		0x1698
#define QCA808X_PHY_MMD3_DEBUG_4		0xa105
#define QCA808X_MMD3_DEBUG_4_VALUE		0x8001
#define QCA808X_PHY_MMD3_DEBUG_5		0xa106
#define QCA808X_MMD3_DEBUG_5_VALUE		0x1111
#define QCA808X_PHY_MMD3_DEBUG_6		0xa011
#define QCA808X_MMD3_DEBUG_6_VALUE		0x5f85

/* master/slave seed config */
#define QCA808X_PHY_DEBUG_LOCAL_SEED		9
#define QCA808X_MASTER_SLAVE_SEED_ENABLE	BIT(1)
#define QCA808X_MASTER_SLAVE_SEED_CFG		GENMASK(12, 2)
#define QCA808X_MASTER_SLAVE_SEED_RANGE		0x32

/* Hibernation yields lower power consumpiton in contrast with normal operation mode.
 * when the copper cable is unplugged, the PHY enters into hibernation mode in about 10s.
 */
#define QCA808X_DBG_AN_TEST			0xb
#define QCA808X_HIBERNATION_EN			BIT(15)

#define QCA808X_MMD7_LED2_CTRL			0x8074
#define QCA808X_MMD7_LED2_FORCE_CTRL		0x8075
#define QCA808X_MMD7_LED1_CTRL			0x8076
#define QCA808X_MMD7_LED1_FORCE_CTRL		0x8077
#define QCA808X_MMD7_LED0_CTRL			0x8078
#define QCA808X_MMD7_LED_CTRL(x)		(0x8078 - ((x) * 2))

#define QCA808X_MMD7_LED0_FORCE_CTRL		0x8079
#define QCA808X_MMD7_LED_FORCE_CTRL(x)		(0x8079 - ((x) * 2))

#define QCA808X_MMD7_LED_POLARITY_CTRL		0x901a
/* QSDK sets by default 0x46 to this reg that sets BIT 6 for
 * LED to active high. It's not clear what BIT 3 and BIT 4 does.
 */
#define QCA808X_LED_ACTIVE_HIGH			BIT(6)

/* QCA808X 1G chip type */
#define QCA808X_PHY_MMD7_CHIP_TYPE		0x901d
#define QCA808X_PHY_CHIP_TYPE_1G		BIT(0)

#define QCA8081_PHY_SERDES_MMD1_FIFO_CTRL	0x9072
#define QCA8081_PHY_FIFO_RSTN			BIT(11)

#define QCA8081_PHY_ID				0x004dd101

MODULE_DESCRIPTION("Qualcomm Atheros QCA808X PHY driver");
MODULE_AUTHOR("Matus Ujhelyi");
MODULE_LICENSE("GPL");

struct qca808x_priv {
	int led_polarity_mode;
	struct qcom_phy_hw_stats hw_stats;
};

static int qca808x_phy_fast_retrain_config(struct phy_device *phydev)
{
	int ret;

	/* Enable fast retrain */
	ret = genphy_c45_fast_retrain(phydev, true);
	if (ret)
		return ret;

	phy_write_mmd(phydev, MDIO_MMD_AN, QCA808X_PHY_MMD7_TOP_OPTION1,
		      QCA808X_TOP_OPTION1_DATA);
	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, QCA808X_PHY_MMD1_MSE_THRESHOLD_20DB,
		      QCA808X_MSE_THRESHOLD_20DB_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, QCA808X_PHY_MMD1_MSE_THRESHOLD_17DB,
		      QCA808X_MSE_THRESHOLD_17DB_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, QCA808X_PHY_MMD1_MSE_THRESHOLD_27DB,
		      QCA808X_MSE_THRESHOLD_27DB_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, QCA808X_PHY_MMD1_MSE_THRESHOLD_28DB,
		      QCA808X_MSE_THRESHOLD_28DB_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PCS, QCA808X_PHY_MMD3_DEBUG_1,
		      QCA808X_MMD3_DEBUG_1_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PCS, QCA808X_PHY_MMD3_DEBUG_4,
		      QCA808X_MMD3_DEBUG_4_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PCS, QCA808X_PHY_MMD3_DEBUG_5,
		      QCA808X_MMD3_DEBUG_5_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PCS, QCA808X_PHY_MMD3_DEBUG_3,
		      QCA808X_MMD3_DEBUG_3_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PCS, QCA808X_PHY_MMD3_DEBUG_6,
		      QCA808X_MMD3_DEBUG_6_VALUE);
	phy_write_mmd(phydev, MDIO_MMD_PCS, QCA808X_PHY_MMD3_DEBUG_2,
		      QCA808X_MMD3_DEBUG_2_VALUE);

	return 0;
}

static int qca808x_phy_ms_seed_enable(struct phy_device *phydev, bool enable)
{
	u16 seed_value;

	if (!enable)
		return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED,
				QCA808X_MASTER_SLAVE_SEED_ENABLE, 0);

	seed_value = get_random_u32_below(QCA808X_MASTER_SLAVE_SEED_RANGE);
	return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED,
			QCA808X_MASTER_SLAVE_SEED_CFG | QCA808X_MASTER_SLAVE_SEED_ENABLE,
			FIELD_PREP(QCA808X_MASTER_SLAVE_SEED_CFG, seed_value) |
			QCA808X_MASTER_SLAVE_SEED_ENABLE);
}

static bool qca808x_is_prefer_master(struct phy_device *phydev)
{
	return (phydev->master_slave_get == MASTER_SLAVE_CFG_MASTER_FORCE) ||
		(phydev->master_slave_get == MASTER_SLAVE_CFG_MASTER_PREFERRED);
}

static bool qca808x_has_fast_retrain_or_slave_seed(struct phy_device *phydev)
{
	return linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->supported);
}

static bool qca808x_is_1g_only(struct phy_device *phydev)
{
	int ret;

	ret = phy_read_mmd(phydev, MDIO_MMD_AN, QCA808X_PHY_MMD7_CHIP_TYPE);
	if (ret < 0)
		return true;

	return !!(QCA808X_PHY_CHIP_TYPE_1G & ret);
}

static void qca808x_fill_possible_interfaces(struct phy_device *phydev)
{
	unsigned long *possible = phydev->possible_interfaces;

	__set_bit(PHY_INTERFACE_MODE_SGMII, possible);

	if (!qca808x_is_1g_only(phydev))
		__set_bit(PHY_INTERFACE_MODE_2500BASEX, possible);
}

static int qca808x_probe(struct phy_device *phydev)
{
	struct device *dev = &phydev->mdio.dev;
	struct qca808x_priv *priv;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	/* Init LED polarity mode to -1 */
	priv->led_polarity_mode = -1;

	phydev->priv = priv;

	return 0;
}

static int qca808x_config_init(struct phy_device *phydev)
{
	struct qca808x_priv *priv = phydev->priv;
	int ret;

	/* Default to LED Active High if active-low not in DT */
	if (priv->led_polarity_mode == -1) {
		ret = phy_set_bits_mmd(phydev, MDIO_MMD_AN,
				       QCA808X_MMD7_LED_POLARITY_CTRL,
				       QCA808X_LED_ACTIVE_HIGH);
		if (ret)
			return ret;
	}

	/* Active adc&vga on 802.3az for the link 1000M and 100M */
	ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, QCA808X_PHY_MMD3_ADDR_CLD_CTRL7,
			     QCA808X_8023AZ_AFE_CTRL_MASK, QCA808X_8023AZ_AFE_EN);
	if (ret)
		return ret;

	/* Adjust the threshold on 802.3az for the link 1000M */
	ret = phy_write_mmd(phydev, MDIO_MMD_PCS,
			    QCA808X_PHY_MMD3_AZ_TRAINING_CTRL,
			    QCA808X_MMD3_AZ_TRAINING_VAL);
	if (ret)
		return ret;

	if (qca808x_has_fast_retrain_or_slave_seed(phydev)) {
		/* Config the fast retrain for the link 2500M */
		ret = qca808x_phy_fast_retrain_config(phydev);
		if (ret)
			return ret;

		ret = genphy_read_master_slave(phydev);
		if (ret < 0)
			return ret;

		if (!qca808x_is_prefer_master(phydev)) {
			/* Enable seed and configure lower ramdom seed to make phy
			 * linked as slave mode.
			 */
			ret = qca808x_phy_ms_seed_enable(phydev, true);
			if (ret)
				return ret;
		}
	}

	qca808x_fill_possible_interfaces(phydev);

	ret = qcom_phy_counter_config(phydev);
	if (ret)
		return ret;

	/* Configure adc threshold as 100mv for the link 10M */
	return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_ADC_THRESHOLD,
				     QCA808X_ADC_THRESHOLD_MASK,
				     QCA808X_ADC_THRESHOLD_100MV);
}

static int qca808x_read_status(struct phy_device *phydev)
{
	struct at803x_ss_mask ss_mask = { 0 };
	int ret;

	ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
	if (ret < 0)
		return ret;

	linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->lp_advertising,
			 ret & MDIO_AN_10GBT_STAT_LP2_5G);

	ret = genphy_read_status(phydev);
	if (ret)
		return ret;

	/* qca8081 takes the different bits for speed value from at803x */
	ss_mask.speed_mask = QCA808X_SS_SPEED_MASK;
	ss_mask.speed_shift = __bf_shf(QCA808X_SS_SPEED_MASK);
	ret = at803x_read_specific_status(phydev, ss_mask);
	if (ret < 0)
		return ret;

	if (phydev->link) {
		if (phydev->speed == SPEED_2500)
			phydev->interface = PHY_INTERFACE_MODE_2500BASEX;
		else
			phydev->interface = PHY_INTERFACE_MODE_SGMII;
	} else {
		/* generate seed as a lower random value to make PHY linked as SLAVE easily,
		 * except for master/slave configuration fault detected or the master mode
		 * preferred.
		 *
		 * the reason for not putting this code into the function link_change_notify is
		 * the corner case where the link partner is also the qca8081 PHY and the seed
		 * value is configured as the same value, the link can't be up and no link change
		 * occurs.
		 */
		if (qca808x_has_fast_retrain_or_slave_seed(phydev)) {
			if (phydev->master_slave_state == MASTER_SLAVE_STATE_ERR ||
			    qca808x_is_prefer_master(phydev)) {
				qca808x_phy_ms_seed_enable(phydev, false);
			} else {
				qca808x_phy_ms_seed_enable(phydev, true);
			}
		}
	}

	return 0;
}

static int qca808x_soft_reset(struct phy_device *phydev)
{
	int ret;

	ret = genphy_soft_reset(phydev);
	if (ret < 0)
		return ret;

	if (qca808x_has_fast_retrain_or_slave_seed(phydev))
		ret = qca808x_phy_ms_seed_enable(phydev, true);

	return ret;
}

static int qca808x_cable_test_start(struct phy_device *phydev)
{
	int ret;

	/* perform CDT with the following configs:
	 * 1. disable hibernation.
	 * 2. force PHY working in MDI mode.
	 * 3. for PHY working in 1000BaseT.
	 * 4. configure the threshold.
	 */

	ret = at803x_debug_reg_mask(phydev, QCA808X_DBG_AN_TEST, QCA808X_HIBERNATION_EN, 0);
	if (ret < 0)
		return ret;

	ret = at803x_config_mdix(phydev, ETH_TP_MDI);
	if (ret < 0)
		return ret;

	/* Force 1000base-T needs to configure PMA/PMD and MII_BMCR */
	phydev->duplex = DUPLEX_FULL;
	phydev->speed = SPEED_1000;
	ret = genphy_c45_pma_setup_forced(phydev);
	if (ret < 0)
		return ret;

	ret = genphy_setup_forced(phydev);
	if (ret < 0)
		return ret;

	/* configure the thresholds for open, short, pair ok test */
	phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8074, 0xc040);
	phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8076, 0xc040);
	phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8077, 0xa060);
	phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8078, 0xc050);
	phy_write_mmd(phydev, MDIO_MMD_PCS, 0x807a, 0xc060);
	phy_write_mmd(phydev, MDIO_MMD_PCS, 0x807e, 0xb060);

	return 0;
}

static int qca808x_get_features(struct phy_device *phydev)
{
	int ret;

	ret = genphy_c45_pma_read_abilities(phydev);
	if (ret)
		return ret;

	/* The autoneg ability is not existed in bit3 of MMD7.1,
	 * but it is supported by qca808x PHY, so we add it here
	 * manually.
	 */
	linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);

	/* As for the qca8081 1G version chip, the 2500baseT ability is also
	 * existed in the bit0 of MMD1.21, we need to remove it manually if
	 * it is the qca8081 1G chip according to the bit0 of MMD7.0x901d.
	 */
	if (qca808x_is_1g_only(phydev))
		linkmode_clear_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->supported);

	return 0;
}

static int qca808x_config_aneg(struct phy_device *phydev)
{
	int phy_ctrl = 0;
	int ret;

	ret = at803x_prepare_config_aneg(phydev);
	if (ret)
		return ret;

	/* The reg MII_BMCR also needs to be configured for force mode, the
	 * genphy_config_aneg is also needed.
	 */
	if (phydev->autoneg == AUTONEG_DISABLE)
		genphy_c45_pma_setup_forced(phydev);

	if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, phydev->advertising))
		phy_ctrl = MDIO_AN_10GBT_CTRL_ADV2_5G;

	ret = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
				     MDIO_AN_10GBT_CTRL_ADV2_5G, phy_ctrl);
	if (ret < 0)
		return ret;

	return __genphy_config_aneg(phydev, ret);
}

static void qca808x_link_change_notify(struct phy_device *phydev)
{
	/* Assert interface sgmii fifo on link down, deassert it on link up,
	 * the interface device address is always phy address added by 1.
	 */
	mdiobus_c45_modify_changed(phydev->mdio.bus, phydev->mdio.addr + 1,
				   MDIO_MMD_PMAPMD, QCA8081_PHY_SERDES_MMD1_FIFO_CTRL,
				   QCA8081_PHY_FIFO_RSTN,
				   phydev->link ? QCA8081_PHY_FIFO_RSTN : 0);
}

static int qca808x_led_parse_netdev(struct phy_device *phydev, unsigned long rules,
				    u16 *offload_trigger)
{
	/* Parsing specific to netdev trigger */
	if (test_bit(TRIGGER_NETDEV_TX, &rules))
		*offload_trigger |= QCA808X_LED_TX_BLINK;
	if (test_bit(TRIGGER_NETDEV_RX, &rules))
		*offload_trigger |= QCA808X_LED_RX_BLINK;
	if (test_bit(TRIGGER_NETDEV_LINK_10, &rules))
		*offload_trigger |= QCA808X_LED_SPEED10_ON;
	if (test_bit(TRIGGER_NETDEV_LINK_100, &rules))
		*offload_trigger |= QCA808X_LED_SPEED100_ON;
	if (test_bit(TRIGGER_NETDEV_LINK_1000, &rules))
		*offload_trigger |= QCA808X_LED_SPEED1000_ON;
	if (test_bit(TRIGGER_NETDEV_LINK_2500, &rules))
		*offload_trigger |= QCA808X_LED_SPEED2500_ON;
	if (test_bit(TRIGGER_NETDEV_HALF_DUPLEX, &rules))
		*offload_trigger |= QCA808X_LED_HALF_DUPLEX_ON;
	if (test_bit(TRIGGER_NETDEV_FULL_DUPLEX, &rules))
		*offload_trigger |= QCA808X_LED_FULL_DUPLEX_ON;

	if (rules && !*offload_trigger)
		return -EOPNOTSUPP;

	/* Enable BLINK_CHECK_BYPASS by default to make the LED
	 * blink even with duplex or speed mode not enabled.
	 */
	*offload_trigger |= QCA808X_LED_BLINK_CHECK_BYPASS;

	return 0;
}

static int qca808x_led_hw_control_enable(struct phy_device *phydev, u8 index)
{
	u16 reg;

	if (index > 2)
		return -EINVAL;

	reg = QCA808X_MMD7_LED_FORCE_CTRL(index);
	return qca808x_led_reg_hw_control_enable(phydev, reg);
}

static int qca808x_led_hw_is_supported(struct phy_device *phydev, u8 index,
				       unsigned long rules)
{
	u16 offload_trigger = 0;

	if (index > 2)
		return -EINVAL;

	return qca808x_led_parse_netdev(phydev, rules, &offload_trigger);
}

static int qca808x_led_hw_control_set(struct phy_device *phydev, u8 index,
				      unsigned long rules)
{
	u16 reg, offload_trigger = 0;
	int ret;

	if (index > 2)
		return -EINVAL;

	reg = QCA808X_MMD7_LED_CTRL(index);

	ret = qca808x_led_parse_netdev(phydev, rules, &offload_trigger);
	if (ret)
		return ret;

	ret = qca808x_led_hw_control_enable(phydev, index);
	if (ret)
		return ret;

	return phy_modify_mmd(phydev, MDIO_MMD_AN, reg,
			      QCA808X_LED_PATTERN_MASK,
			      offload_trigger);
}

static bool qca808x_led_hw_control_status(struct phy_device *phydev, u8 index)
{
	u16 reg;

	if (index > 2)
		return false;

	reg = QCA808X_MMD7_LED_FORCE_CTRL(index);
	return qca808x_led_reg_hw_control_status(phydev, reg);
}

static int qca808x_led_hw_control_get(struct phy_device *phydev, u8 index,
				      unsigned long *rules)
{
	u16 reg;
	int val;

	if (index > 2)
		return -EINVAL;

	/* Check if we have hw control enabled */
	if (qca808x_led_hw_control_status(phydev, index))
		return -EINVAL;

	reg = QCA808X_MMD7_LED_CTRL(index);

	val = phy_read_mmd(phydev, MDIO_MMD_AN, reg);
	if (val & QCA808X_LED_TX_BLINK)
		set_bit(TRIGGER_NETDEV_TX, rules);
	if (val & QCA808X_LED_RX_BLINK)
		set_bit(TRIGGER_NETDEV_RX, rules);
	if (val & QCA808X_LED_SPEED10_ON)
		set_bit(TRIGGER_NETDEV_LINK_10, rules);
	if (val & QCA808X_LED_SPEED100_ON)
		set_bit(TRIGGER_NETDEV_LINK_100, rules);
	if (val & QCA808X_LED_SPEED1000_ON)
		set_bit(TRIGGER_NETDEV_LINK_1000, rules);
	if (val & QCA808X_LED_SPEED2500_ON)
		set_bit(TRIGGER_NETDEV_LINK_2500, rules);
	if (val & QCA808X_LED_HALF_DUPLEX_ON)
		set_bit(TRIGGER_NETDEV_HALF_DUPLEX, rules);
	if (val & QCA808X_LED_FULL_DUPLEX_ON)
		set_bit(TRIGGER_NETDEV_FULL_DUPLEX, rules);

	return 0;
}

static int qca808x_led_hw_control_reset(struct phy_device *phydev, u8 index)
{
	u16 reg;

	if (index > 2)
		return -EINVAL;

	reg = QCA808X_MMD7_LED_CTRL(index);

	return phy_clear_bits_mmd(phydev, MDIO_MMD_AN, reg,
				  QCA808X_LED_PATTERN_MASK);
}

static int qca808x_led_brightness_set(struct phy_device *phydev,
				      u8 index, enum led_brightness value)
{
	u16 reg;
	int ret;

	if (index > 2)
		return -EINVAL;

	if (!value) {
		ret = qca808x_led_hw_control_reset(phydev, index);
		if (ret)
			return ret;
	}

	reg = QCA808X_MMD7_LED_FORCE_CTRL(index);
	return qca808x_led_reg_brightness_set(phydev, reg, value);
}

static int qca808x_led_blink_set(struct phy_device *phydev, u8 index,
				 unsigned long *delay_on,
				 unsigned long *delay_off)
{
	u16 reg;

	if (index > 2)
		return -EINVAL;

	reg = QCA808X_MMD7_LED_FORCE_CTRL(index);
	return qca808x_led_reg_blink_set(phydev, reg, delay_on, delay_off);
}

static int qca808x_led_polarity_set(struct phy_device *phydev, int index,
				    unsigned long modes)
{
	struct qca808x_priv *priv = phydev->priv;
	bool active_low = false;
	u32 mode;

	for_each_set_bit(mode, &modes, __PHY_LED_MODES_NUM) {
		switch (mode) {
		case PHY_LED_ACTIVE_LOW:
			active_low = true;
			break;
		default:
			return -EINVAL;
		}
	}

	/* PHY polarity is global and can't be set per LED.
	 * To detect this, check if last requested polarity mode
	 * match the new one.
	 */
	if (priv->led_polarity_mode >= 0 &&
	    priv->led_polarity_mode != active_low) {
		phydev_err(phydev, "PHY polarity is global. Mismatched polarity on different LED\n");
		return -EINVAL;
	}

	/* Save the last PHY polarity mode */
	priv->led_polarity_mode = active_low;

	return phy_modify_mmd(phydev, MDIO_MMD_AN,
			      QCA808X_MMD7_LED_POLARITY_CTRL,
			      QCA808X_LED_ACTIVE_HIGH,
			      active_low ? 0 : QCA808X_LED_ACTIVE_HIGH);
}

static int qca808x_update_stats(struct phy_device *phydev)
{
	struct qca808x_priv *priv = phydev->priv;

	return qcom_phy_update_stats(phydev, &priv->hw_stats);
}

static void qca808x_get_phy_stats(struct phy_device *phydev,
				  struct ethtool_eth_phy_stats *eth_stats,
				  struct ethtool_phy_stats *stats)
{
	struct qca808x_priv *priv = phydev->priv;

	qcom_phy_get_stats(stats, priv->hw_stats);
}

static struct phy_driver qca808x_driver[] = {
{
	/* Qualcomm QCA8081 */
	PHY_ID_MATCH_EXACT(QCA8081_PHY_ID),
	.name			= "Qualcomm QCA8081",
	.flags			= PHY_POLL_CABLE_TEST,
	.probe			= qca808x_probe,
	.config_intr		= at803x_config_intr,
	.handle_interrupt	= at803x_handle_interrupt,
	.get_tunable		= at803x_get_tunable,
	.set_tunable		= at803x_set_tunable,
	.set_wol		= at8031_set_wol,
	.get_wol		= at803x_get_wol,
	.get_features		= qca808x_get_features,
	.config_aneg		= qca808x_config_aneg,
	.suspend		= genphy_suspend,
	.resume			= genphy_resume,
	.read_status		= qca808x_read_status,
	.config_init		= qca808x_config_init,
	.soft_reset		= qca808x_soft_reset,
	.cable_test_start	= qca808x_cable_test_start,
	.cable_test_get_status	= qca808x_cable_test_get_status,
	.link_change_notify	= qca808x_link_change_notify,
	.led_brightness_set	= qca808x_led_brightness_set,
	.led_blink_set		= qca808x_led_blink_set,
	.led_hw_is_supported	= qca808x_led_hw_is_supported,
	.led_hw_control_set	= qca808x_led_hw_control_set,
	.led_hw_control_get	= qca808x_led_hw_control_get,
	.led_polarity_set	= qca808x_led_polarity_set,
	.update_stats		= qca808x_update_stats,
	.get_phy_stats		= qca808x_get_phy_stats,
}, };

module_phy_driver(qca808x_driver);

static const struct mdio_device_id __maybe_unused qca808x_tbl[] = {
	{ PHY_ID_MATCH_EXACT(QCA8081_PHY_ID) },
	{ }
};

MODULE_DEVICE_TABLE(mdio, qca808x_tbl);