net: dwc_eth_qos: use generic ethernet phy for stm32 variant

Use the generic ethernet phy which already manages the correct binding
for gpio reset, including the assert an deassert delays.
Reviewed-by: NRamon Fried <rfried.dev@gmail.com>
Signed-off-by: NPatrick Delaunay <patrick.delaunay@foss.st.com>

drivers/net/Kconfig

@@ -206,6 +206,7 @@ config DWC_ETH_QOS_IMX
 config DWC_ETH_QOS_STM32
 	bool "Synopsys DWC Ethernet QOS device support for STM32"
 	depends on DWC_ETH_QOS
+	select DM_ETH_PHY
 	default y if ARCH_STM32MP
 	help
 	  The Synopsys Designware Ethernet QOS IP block with the specific

drivers/net/dwc_eth_qos.c

@@ -696,29 +696,6 @@ static int eqos_start_resets_tegra186(struct udevice *dev)
 
 static int eqos_start_resets_stm32(struct udevice *dev)
 {
-	struct eqos_priv *eqos = dev_get_priv(dev);
-	int ret;
-
-	debug("%s(dev=%p):\n", __func__, dev);
-	if (dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
-		ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
-		if (ret < 0) {
-			pr_err("dm_gpio_set_value(phy_reset, assert) failed: %d",
-			       ret);
-			return ret;
-		}
-
-		udelay(2);
-
-		ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
-		if (ret < 0) {
-			pr_err("dm_gpio_set_value(phy_reset, deassert) failed: %d",
-			       ret);
-			return ret;
-		}
-	}
-	debug("%s: OK\n", __func__);
-
 	return 0;
 }
 
@@ -739,18 +716,6 @@ static int eqos_stop_resets_tegra186(struct udevice *dev)
 
 static int eqos_stop_resets_stm32(struct udevice *dev)
 {
-	struct eqos_priv *eqos = dev_get_priv(dev);
-	int ret;
-
-	if (dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
-		ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
-		if (ret < 0) {
-			pr_err("dm_gpio_set_value(phy_reset, assert) failed: %d",
-			       ret);
-			return ret;
-		}
-	}
-
 	return 0;
 }
 
@@ -1772,7 +1737,6 @@ static int eqos_probe_resources_stm32(struct udevice *dev)
 	struct eqos_priv *eqos = dev_get_priv(dev);
 	int ret;
 	phy_interface_t interface;
-	struct ofnode_phandle_args phandle_args;
 
 	debug("%s(dev=%p):\n", __func__, dev);
 
@@ -1812,20 +1776,6 @@ static int eqos_probe_resources_stm32(struct udevice *dev)
 	if (ret)
 		pr_warn("No phy clock provided %d", ret);
 
-	ret = dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
-					 &phandle_args);
-	if (!ret) {
-		/* search "reset-gpios" in phy node */
-		ret = gpio_request_by_name_nodev(phandle_args.node,
-						 "reset-gpios", 0,
-						 &eqos->phy_reset_gpio,
-						 GPIOD_IS_OUT |
-						 GPIOD_IS_OUT_ACTIVE);
-		if (ret)
-			pr_warn("gpio_request_by_name(phy reset) not provided %d",
-				ret);
-	}
-
 	debug("%s: OK\n", __func__);
 	return 0;