drivers/net/dwc_eth_qos_stm32.c - github/trini/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2024, Marek Vasut <marex@denx.de>
  *
  * This is code moved from drivers/net/dwc_eth_qos.c , which is:
  * Copyright (c) 2016, NVIDIA CORPORATION.
  */

 #include <asm/cache.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
 #include <clk.h>
 #include <cpu_func.h>
 #include <dm.h>
 #include <dm/device_compat.h>
 #include <errno.h>
 #include <eth_phy.h>
 #include <log.h>
 #include <malloc.h>
 #include <memalign.h>
 #include <miiphy.h>
 #include <net.h>
 #include <netdev.h>
 #include <phy.h>
 #include <regmap.h>
 #include <reset.h>
 #include <syscon.h>
 #include <wait_bit.h>
 #include <linux/bitfield.h>
 #include <linux/delay.h>

 #include "dwc_eth_qos.h"

 /* SYSCFG registers */
 #define SYSCFG_PMCSETR		0x04
 #define SYSCFG_PMCCLRR_MP13	0x08
 #define SYSCFG_PMCCLRR_MP15	0x44

 #define SYSCFG_PMCSETR_ETH1_MASK	GENMASK(23, 16)
 #define SYSCFG_PMCSETR_ETH2_MASK	GENMASK(31, 24)

 #define SYSCFG_PMCSETR_ETH_CLK_SEL	BIT(16)
 #define SYSCFG_PMCSETR_ETH_REF_CLK_SEL	BIT(17)

 /* STM32MP15xx specific bit */
 #define SYSCFG_PMCSETR_ETH_SELMII	BIT(20)

 #define SYSCFG_PMCSETR_ETH_SEL_MASK	GENMASK(23, 21)
 #define SYSCFG_PMCSETR_ETH_SEL_GMII_MII	0x0
 #define SYSCFG_PMCSETR_ETH_SEL_RGMII	0x1
 #define SYSCFG_PMCSETR_ETH_SEL_RMII	0x4

 static ulong eqos_get_tick_clk_rate_stm32(struct udevice *dev)
 {
 	struct eqos_priv __maybe_unused *eqos = dev_get_priv(dev);

 	if (!CONFIG_IS_ENABLED(CLK))
 		return 0;

 	return clk_get_rate(&eqos->clk_master_bus);
 }

 static int eqos_start_clks_stm32(struct udevice *dev)
 {
 	struct eqos_priv __maybe_unused *eqos = dev_get_priv(dev);
 	int ret;

 	if (!CONFIG_IS_ENABLED(CLK))
 		return 0;

 	dev_dbg(dev, "%s:\n", __func__);

 	ret = clk_enable(&eqos->clk_master_bus);
 	if (ret < 0) {
 		dev_err(dev, "clk_enable(clk_master_bus) failed: %d\n", ret);
 		goto err;
 	}

 	ret = clk_enable(&eqos->clk_rx);
 	if (ret < 0) {
 		dev_err(dev, "clk_enable(clk_rx) failed: %d\n", ret);
 		goto err_disable_clk_master_bus;
 	}

 	ret = clk_enable(&eqos->clk_tx);
 	if (ret < 0) {
 		dev_err(dev, "clk_enable(clk_tx) failed: %d\n", ret);
 		goto err_disable_clk_rx;
 	}

 	if (clk_valid(&eqos->clk_ck) && !eqos->clk_ck_enabled) {
 		ret = clk_enable(&eqos->clk_ck);
 		if (ret < 0) {
 			dev_err(dev, "clk_enable(clk_ck) failed: %d\n", ret);
 			goto err_disable_clk_tx;
 		}
 		eqos->clk_ck_enabled = true;
 	}

 	dev_dbg(dev, "%s: OK\n", __func__);
 	return 0;

 err_disable_clk_tx:
 	clk_disable(&eqos->clk_tx);
 err_disable_clk_rx:
 	clk_disable(&eqos->clk_rx);
 err_disable_clk_master_bus:
 	clk_disable(&eqos->clk_master_bus);
 err:
 	dev_dbg(dev, "%s: FAILED: %d\n", __func__, ret);

 	return ret;
 }

 static int eqos_stop_clks_stm32(struct udevice *dev)
 {
 	struct eqos_priv __maybe_unused *eqos = dev_get_priv(dev);

 	if (!CONFIG_IS_ENABLED(CLK))
 		return 0;

 	dev_dbg(dev, "%s:\n", __func__);

 	clk_disable(&eqos->clk_tx);
 	clk_disable(&eqos->clk_rx);
 	clk_disable(&eqos->clk_master_bus);

 	dev_dbg(dev, "%s: OK\n", __func__);

 	return 0;
 }

 static int eqos_probe_syscfg_stm32(struct udevice *dev,
 				   phy_interface_t interface_type)
 {
 	/* Ethernet 50MHz RMII clock selection. */
 	const bool eth_ref_clk_sel = dev_read_bool(dev, "st,eth-ref-clk-sel");
 	/* SoC is STM32MP13xx with two ethernet MACs */
 	const bool is_mp13 = device_is_compatible(dev, "st,stm32mp13-dwmac");
 	/* Gigabit Ethernet 125MHz clock selection. */
 	const bool eth_clk_sel = dev_read_bool(dev, "st,eth-clk-sel");
 	/* Ethernet clock source is RCC. */
 	const bool ext_phyclk = dev_read_bool(dev, "st,ext-phyclk");
 	struct regmap *regmap;
 	u32 regmap_mask;
 	u32 value;

 	regmap = syscon_regmap_lookup_by_phandle(dev, "st,syscon");
 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);

 	regmap_mask = dev_read_u32_index_default(dev, "st,syscon", 2,
 						 SYSCFG_PMCSETR_ETH1_MASK);

 	switch (interface_type) {
 	case PHY_INTERFACE_MODE_MII:
 		dev_dbg(dev, "PHY_INTERFACE_MODE_MII\n");
 		value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
 				   SYSCFG_PMCSETR_ETH_SEL_GMII_MII);
 		/*
 		 * STM32MP15xx supports both MII and GMII, STM32MP13xx MII only.
 		 * SYSCFG_PMCSETR ETH_SELMII is present only on STM32MP15xx and
 		 * acts as a selector between 0:GMII and 1:MII. As STM32MP13xx
 		 * supports only MII, ETH_SELMII is not present.
 		 */
 		if (!is_mp13)	/* Select MII mode on STM32MP15xx */
 			value |= SYSCFG_PMCSETR_ETH_SELMII;
 		break;
 	case PHY_INTERFACE_MODE_GMII:	/* STM32MP15xx only */
 		dev_dbg(dev, "PHY_INTERFACE_MODE_GMII\n");
 		value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
 				   SYSCFG_PMCSETR_ETH_SEL_GMII_MII);
 		/*
 		 * If eth_clk_sel is set, use internal ETH_CLKx clock from RCC,
 		 * otherwise use external clock from IO pin (requires matching
 		 * GPIO block AF setting of that pin).
 		 */
 		if (eth_clk_sel || ext_phyclk)
 			value |= SYSCFG_PMCSETR_ETH_CLK_SEL;
 		break;
 	case PHY_INTERFACE_MODE_RMII:
 		dev_dbg(dev, "PHY_INTERFACE_MODE_RMII\n");
 		value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
 				   SYSCFG_PMCSETR_ETH_SEL_RMII);
 		/*
 		 * If eth_ref_clk_sel is set, use internal clock from RCC,
 		 * otherwise use external clock from ETHn_RX_CLK/ETHn_REF_CLK
 		 * IO pin (requires matching GPIO block AF setting of that
 		 * pin).
 		 */
 		if (eth_ref_clk_sel || ext_phyclk)
 			value |= SYSCFG_PMCSETR_ETH_REF_CLK_SEL;
 		break;
 	case PHY_INTERFACE_MODE_RGMII:
 	case PHY_INTERFACE_MODE_RGMII_ID:
 	case PHY_INTERFACE_MODE_RGMII_RXID:
 	case PHY_INTERFACE_MODE_RGMII_TXID:
 		dev_dbg(dev, "PHY_INTERFACE_MODE_RGMII\n");
 		value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
 				   SYSCFG_PMCSETR_ETH_SEL_RGMII);
 		/*
 		 * If eth_clk_sel is set, use internal ETH_CLKx clock from RCC,
 		 * otherwise use external clock from ETHx_CLK125 pin (requires
 		 * matching GPIO block AF setting of that pin).
 		 */
 		if (eth_clk_sel || ext_phyclk)
 			value |= SYSCFG_PMCSETR_ETH_CLK_SEL;
 		break;
 	default:
 		dev_dbg(dev, "Do not manage %d interface\n",
 			interface_type);
 		/* Do not manage others interfaces */
 		return -EINVAL;
 	}

 	/* Shift value at correct ethernet MAC offset in SYSCFG_PMCSETR */
 	value <<= ffs(regmap_mask) - ffs(SYSCFG_PMCSETR_ETH1_MASK);

 	/* Update PMCCLRR (clear register) */
 	regmap_write(regmap, is_mp13 ?
 			     SYSCFG_PMCCLRR_MP13 : SYSCFG_PMCCLRR_MP15,
 			     regmap_mask);

 	return regmap_update_bits(regmap, SYSCFG_PMCSETR, regmap_mask, value);
 }

 static int eqos_probe_resources_stm32(struct udevice *dev)
 {
 	struct eqos_priv *eqos = dev_get_priv(dev);
 	phy_interface_t interface;
 	int ret;

 	dev_dbg(dev, "%s:\n", __func__);

 	interface = eqos->config->interface(dev);

 	if (interface == PHY_INTERFACE_MODE_NA) {
 		dev_err(dev, "Invalid PHY interface\n");
 		return -EINVAL;
 	}

 	ret = eqos_probe_syscfg_stm32(dev, interface);
 	if (ret)
 		return -EINVAL;

 	ret = clk_get_by_name(dev, "stmmaceth", &eqos->clk_master_bus);
 	if (ret) {
 		dev_err(dev, "clk_get_by_name(master_bus) failed: %d\n", ret);
 		goto err_probe;
 	}

 	ret = clk_get_by_name(dev, "mac-clk-rx", &eqos->clk_rx);
 	if (ret) {
 		dev_err(dev, "clk_get_by_name(rx) failed: %d\n", ret);
 		goto err_probe;
 	}

 	ret = clk_get_by_name(dev, "mac-clk-tx", &eqos->clk_tx);
 	if (ret) {
 		dev_err(dev, "clk_get_by_name(tx) failed: %d\n", ret);
 		goto err_probe;
 	}

 	/*  Get ETH_CLK clocks (optional) */
 	ret = clk_get_by_name(dev, "eth-ck", &eqos->clk_ck);
 	if (ret)
 		dev_warn(dev, "No phy clock provided %d\n", ret);

 	/* Get reset gpio pin (optional) */
 	ret = gpio_request_by_name(dev, "phy-reset-gpios", 0,
 				   &eqos->phy_reset_gpio, GPIOD_IS_OUT);
 	if (ret)
 		pr_warn("No phy reset gpio provided: %d\n", ret);

 	dev_dbg(dev, "%s: OK\n", __func__);

 	return 0;

 err_probe:

 	dev_dbg(dev, "%s: returns %d\n", __func__, ret);

 	return ret;
 }

 static int eqos_start_resets_stm32(struct udevice *dev)
 {
 	struct eqos_priv *eqos = dev_get_priv(dev);

 	debug("%s(dev=%p):\n", __func__, dev);

 	if (dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
 		dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
 		udelay(2);
 		dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
 	}

 	return 0;
 }

 static int eqos_remove_resources_stm32(struct udevice *dev)
 {
 	dev_dbg(dev, "%s:\n", __func__);

 	return 0;
 }

 static struct eqos_ops eqos_stm32_ops = {
 	.eqos_inval_desc = eqos_inval_desc_generic,
 	.eqos_flush_desc = eqos_flush_desc_generic,
 	.eqos_inval_buffer = eqos_inval_buffer_generic,
 	.eqos_flush_buffer = eqos_flush_buffer_generic,
 	.eqos_probe_resources = eqos_probe_resources_stm32,
 	.eqos_remove_resources = eqos_remove_resources_stm32,
 	.eqos_stop_resets = eqos_null_ops,
 	.eqos_start_resets = eqos_start_resets_stm32,
 	.eqos_stop_clks = eqos_stop_clks_stm32,
 	.eqos_start_clks = eqos_start_clks_stm32,
 	.eqos_calibrate_pads = eqos_null_ops,
 	.eqos_disable_calibration = eqos_null_ops,
 	.eqos_set_tx_clk_speed = eqos_null_ops,
 	.eqos_get_enetaddr = eqos_null_ops,
 	.eqos_get_tick_clk_rate = eqos_get_tick_clk_rate_stm32
 };

 struct eqos_config __maybe_unused eqos_stm32mp13_config = {
 	.reg_access_always_ok = false,
 	.mdio_wait = 10000,
 	.swr_wait = 50,
 	.config_mac = EQOS_MAC_RXQ_CTRL0_RXQ0EN_ENABLED_DCB,
 	.config_mac_mdio = EQOS_MAC_MDIO_ADDRESS_CR_250_300,
 	.axi_bus_width = EQOS_AXI_WIDTH_32,
 	.interface = dev_read_phy_mode,
 	.ops = &eqos_stm32_ops
 };

 struct eqos_config __maybe_unused eqos_stm32mp15_config = {
 	.reg_access_always_ok = false,
 	.mdio_wait = 10000,
 	.swr_wait = 50,
 	.config_mac = EQOS_MAC_RXQ_CTRL0_RXQ0EN_ENABLED_AV,
 	.config_mac_mdio = EQOS_MAC_MDIO_ADDRESS_CR_250_300,
 	.axi_bus_width = EQOS_AXI_WIDTH_64,
 	.interface = dev_read_phy_mode,
 	.ops = &eqos_stm32_ops
 };
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright (C) 2024, Marek Vasut <marex@denx.de>
	*
	* This is code moved from drivers/net/dwc_eth_qos.c , which is:
	* Copyright (c) 2016, NVIDIA CORPORATION.
	*/

	#include <asm/cache.h>
	#include <asm/gpio.h>
	#include <asm/io.h>
	#include <clk.h>
	#include <cpu_func.h>
	#include <dm.h>
	#include <dm/device_compat.h>
	#include <errno.h>
	#include <eth_phy.h>
	#include <log.h>
	#include <malloc.h>
	#include <memalign.h>
	#include <miiphy.h>
	#include <net.h>
	#include <netdev.h>
	#include <phy.h>
	#include <regmap.h>
	#include <reset.h>
	#include <syscon.h>
	#include <wait_bit.h>
	#include <linux/bitfield.h>
	#include <linux/delay.h>

	#include "dwc_eth_qos.h"

	/* SYSCFG registers */
	#define SYSCFG_PMCSETR 0x04
	#define SYSCFG_PMCCLRR_MP13 0x08
	#define SYSCFG_PMCCLRR_MP15 0x44

	#define SYSCFG_PMCSETR_ETH1_MASK GENMASK(23, 16)
	#define SYSCFG_PMCSETR_ETH2_MASK GENMASK(31, 24)

	#define SYSCFG_PMCSETR_ETH_CLK_SEL BIT(16)
	#define SYSCFG_PMCSETR_ETH_REF_CLK_SEL BIT(17)

	/* STM32MP15xx specific bit */
	#define SYSCFG_PMCSETR_ETH_SELMII BIT(20)

	#define SYSCFG_PMCSETR_ETH_SEL_MASK GENMASK(23, 21)
	#define SYSCFG_PMCSETR_ETH_SEL_GMII_MII 0x0
	#define SYSCFG_PMCSETR_ETH_SEL_RGMII 0x1
	#define SYSCFG_PMCSETR_ETH_SEL_RMII 0x4

	static ulong eqos_get_tick_clk_rate_stm32(struct udevice *dev)
	{
	struct eqos_priv __maybe_unused *eqos = dev_get_priv(dev);

	if (!CONFIG_IS_ENABLED(CLK))
	return 0;

	return clk_get_rate(&eqos->clk_master_bus);
	}

	static int eqos_start_clks_stm32(struct udevice *dev)
	{
	struct eqos_priv __maybe_unused *eqos = dev_get_priv(dev);
	int ret;

	if (!CONFIG_IS_ENABLED(CLK))
	return 0;

	dev_dbg(dev, "%s:\n", __func__);

	ret = clk_enable(&eqos->clk_master_bus);
	if (ret < 0) {
	dev_err(dev, "clk_enable(clk_master_bus) failed: %d\n", ret);
	goto err;
	}

	ret = clk_enable(&eqos->clk_rx);
	if (ret < 0) {
	dev_err(dev, "clk_enable(clk_rx) failed: %d\n", ret);
	goto err_disable_clk_master_bus;
	}

	ret = clk_enable(&eqos->clk_tx);
	if (ret < 0) {
	dev_err(dev, "clk_enable(clk_tx) failed: %d\n", ret);
	goto err_disable_clk_rx;
	}

	if (clk_valid(&eqos->clk_ck) && !eqos->clk_ck_enabled) {
	ret = clk_enable(&eqos->clk_ck);
	if (ret < 0) {
	dev_err(dev, "clk_enable(clk_ck) failed: %d\n", ret);
	goto err_disable_clk_tx;
	}
	eqos->clk_ck_enabled = true;
	}

	dev_dbg(dev, "%s: OK\n", __func__);
	return 0;

	err_disable_clk_tx:
	clk_disable(&eqos->clk_tx);
	err_disable_clk_rx:
	clk_disable(&eqos->clk_rx);
	err_disable_clk_master_bus:
	clk_disable(&eqos->clk_master_bus);
	err:
	dev_dbg(dev, "%s: FAILED: %d\n", __func__, ret);

	return ret;
	}

	static int eqos_stop_clks_stm32(struct udevice *dev)
	{
	struct eqos_priv __maybe_unused *eqos = dev_get_priv(dev);

	if (!CONFIG_IS_ENABLED(CLK))
	return 0;

	dev_dbg(dev, "%s:\n", __func__);

	clk_disable(&eqos->clk_tx);
	clk_disable(&eqos->clk_rx);
	clk_disable(&eqos->clk_master_bus);

	dev_dbg(dev, "%s: OK\n", __func__);

	return 0;
	}

	static int eqos_probe_syscfg_stm32(struct udevice *dev,
	phy_interface_t interface_type)
	{
	/* Ethernet 50MHz RMII clock selection. */
	const bool eth_ref_clk_sel = dev_read_bool(dev, "st,eth-ref-clk-sel");
	/* SoC is STM32MP13xx with two ethernet MACs */
	const bool is_mp13 = device_is_compatible(dev, "st,stm32mp13-dwmac");
	/* Gigabit Ethernet 125MHz clock selection. */
	const bool eth_clk_sel = dev_read_bool(dev, "st,eth-clk-sel");
	/* Ethernet clock source is RCC. */
	const bool ext_phyclk = dev_read_bool(dev, "st,ext-phyclk");
	struct regmap *regmap;
	u32 regmap_mask;
	u32 value;

	regmap = syscon_regmap_lookup_by_phandle(dev, "st,syscon");
	if (IS_ERR(regmap))
	return PTR_ERR(regmap);

	regmap_mask = dev_read_u32_index_default(dev, "st,syscon", 2,
	SYSCFG_PMCSETR_ETH1_MASK);

	switch (interface_type) {
	case PHY_INTERFACE_MODE_MII:
	dev_dbg(dev, "PHY_INTERFACE_MODE_MII\n");
	value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
	SYSCFG_PMCSETR_ETH_SEL_GMII_MII);
	/*
	* STM32MP15xx supports both MII and GMII, STM32MP13xx MII only.
	* SYSCFG_PMCSETR ETH_SELMII is present only on STM32MP15xx and
	* acts as a selector between 0:GMII and 1:MII. As STM32MP13xx
	* supports only MII, ETH_SELMII is not present.
	*/
	if (!is_mp13) /* Select MII mode on STM32MP15xx */
	value \|= SYSCFG_PMCSETR_ETH_SELMII;
	break;
	case PHY_INTERFACE_MODE_GMII: /* STM32MP15xx only */
	dev_dbg(dev, "PHY_INTERFACE_MODE_GMII\n");
	value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
	SYSCFG_PMCSETR_ETH_SEL_GMII_MII);
	/*
	* If eth_clk_sel is set, use internal ETH_CLKx clock from RCC,
	* otherwise use external clock from IO pin (requires matching
	* GPIO block AF setting of that pin).
	*/
	if (eth_clk_sel \|\| ext_phyclk)
	value \|= SYSCFG_PMCSETR_ETH_CLK_SEL;
	break;
	case PHY_INTERFACE_MODE_RMII:
	dev_dbg(dev, "PHY_INTERFACE_MODE_RMII\n");
	value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
	SYSCFG_PMCSETR_ETH_SEL_RMII);
	/*
	* If eth_ref_clk_sel is set, use internal clock from RCC,
	* otherwise use external clock from ETHn_RX_CLK/ETHn_REF_CLK
	* IO pin (requires matching GPIO block AF setting of that
	* pin).
	*/
	if (eth_ref_clk_sel \|\| ext_phyclk)
	value \|= SYSCFG_PMCSETR_ETH_REF_CLK_SEL;
	break;
	case PHY_INTERFACE_MODE_RGMII:
	case PHY_INTERFACE_MODE_RGMII_ID:
	case PHY_INTERFACE_MODE_RGMII_RXID:
	case PHY_INTERFACE_MODE_RGMII_TXID:
	dev_dbg(dev, "PHY_INTERFACE_MODE_RGMII\n");
	value = FIELD_PREP(SYSCFG_PMCSETR_ETH_SEL_MASK,
	SYSCFG_PMCSETR_ETH_SEL_RGMII);
	/*
	* If eth_clk_sel is set, use internal ETH_CLKx clock from RCC,
	* otherwise use external clock from ETHx_CLK125 pin (requires
	* matching GPIO block AF setting of that pin).
	*/
	if (eth_clk_sel \|\| ext_phyclk)
	value \|= SYSCFG_PMCSETR_ETH_CLK_SEL;
	break;
	default:
	dev_dbg(dev, "Do not manage %d interface\n",
	interface_type);
	/* Do not manage others interfaces */
	return -EINVAL;
	}

	/* Shift value at correct ethernet MAC offset in SYSCFG_PMCSETR */
	value <<= ffs(regmap_mask) - ffs(SYSCFG_PMCSETR_ETH1_MASK);

	/* Update PMCCLRR (clear register) */
	regmap_write(regmap, is_mp13 ?
	SYSCFG_PMCCLRR_MP13 : SYSCFG_PMCCLRR_MP15,
	regmap_mask);

	return regmap_update_bits(regmap, SYSCFG_PMCSETR, regmap_mask, value);
	}

	static int eqos_probe_resources_stm32(struct udevice *dev)
	{
	struct eqos_priv *eqos = dev_get_priv(dev);
	phy_interface_t interface;
	int ret;

	dev_dbg(dev, "%s:\n", __func__);

	interface = eqos->config->interface(dev);

	if (interface == PHY_INTERFACE_MODE_NA) {
	dev_err(dev, "Invalid PHY interface\n");
	return -EINVAL;
	}

	ret = eqos_probe_syscfg_stm32(dev, interface);
	if (ret)
	return -EINVAL;

	ret = clk_get_by_name(dev, "stmmaceth", &eqos->clk_master_bus);
	if (ret) {
	dev_err(dev, "clk_get_by_name(master_bus) failed: %d\n", ret);
	goto err_probe;
	}

	ret = clk_get_by_name(dev, "mac-clk-rx", &eqos->clk_rx);
	if (ret) {
	dev_err(dev, "clk_get_by_name(rx) failed: %d\n", ret);
	goto err_probe;
	}

	ret = clk_get_by_name(dev, "mac-clk-tx", &eqos->clk_tx);
	if (ret) {
	dev_err(dev, "clk_get_by_name(tx) failed: %d\n", ret);
	goto err_probe;
	}

	/* Get ETH_CLK clocks (optional) */
	ret = clk_get_by_name(dev, "eth-ck", &eqos->clk_ck);
	if (ret)
	dev_warn(dev, "No phy clock provided %d\n", ret);

	/* Get reset gpio pin (optional) */
	ret = gpio_request_by_name(dev, "phy-reset-gpios", 0,
	&eqos->phy_reset_gpio, GPIOD_IS_OUT);
	if (ret)
	pr_warn("No phy reset gpio provided: %d\n", ret);

	dev_dbg(dev, "%s: OK\n", __func__);

	return 0;

	err_probe:

	dev_dbg(dev, "%s: returns %d\n", __func__, ret);

	return ret;
	}

	static int eqos_start_resets_stm32(struct udevice *dev)
	{
	struct eqos_priv *eqos = dev_get_priv(dev);

	debug("%s(dev=%p):\n", __func__, dev);

	if (dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
	dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
	udelay(2);
	dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
	}

	return 0;
	}

	static int eqos_remove_resources_stm32(struct udevice *dev)
	{
	dev_dbg(dev, "%s:\n", __func__);

	return 0;
	}

	static struct eqos_ops eqos_stm32_ops = {
	.eqos_inval_desc = eqos_inval_desc_generic,
	.eqos_flush_desc = eqos_flush_desc_generic,
	.eqos_inval_buffer = eqos_inval_buffer_generic,
	.eqos_flush_buffer = eqos_flush_buffer_generic,
	.eqos_probe_resources = eqos_probe_resources_stm32,
	.eqos_remove_resources = eqos_remove_resources_stm32,
	.eqos_stop_resets = eqos_null_ops,
	.eqos_start_resets = eqos_start_resets_stm32,
	.eqos_stop_clks = eqos_stop_clks_stm32,
	.eqos_start_clks = eqos_start_clks_stm32,
	.eqos_calibrate_pads = eqos_null_ops,
	.eqos_disable_calibration = eqos_null_ops,
	.eqos_set_tx_clk_speed = eqos_null_ops,
	.eqos_get_enetaddr = eqos_null_ops,
	.eqos_get_tick_clk_rate = eqos_get_tick_clk_rate_stm32
	};

	struct eqos_config __maybe_unused eqos_stm32mp13_config = {
	.reg_access_always_ok = false,
	.mdio_wait = 10000,
	.swr_wait = 50,
	.config_mac = EQOS_MAC_RXQ_CTRL0_RXQ0EN_ENABLED_DCB,
	.config_mac_mdio = EQOS_MAC_MDIO_ADDRESS_CR_250_300,
	.axi_bus_width = EQOS_AXI_WIDTH_32,
	.interface = dev_read_phy_mode,
	.ops = &eqos_stm32_ops
	};

	struct eqos_config __maybe_unused eqos_stm32mp15_config = {
	.reg_access_always_ok = false,
	.mdio_wait = 10000,
	.swr_wait = 50,
	.config_mac = EQOS_MAC_RXQ_CTRL0_RXQ0EN_ENABLED_AV,
	.config_mac_mdio = EQOS_MAC_MDIO_ADDRESS_CR_250_300,
	.axi_bus_width = EQOS_AXI_WIDTH_64,
	.interface = dev_read_phy_mode,
	.ops = &eqos_stm32_ops
	};