Merge remote-tracking branch 'qcs404-ethernet/tracking-qcomlt-qcs404-ethernet' into integration-linux-qcomltintegration-linux-qcomlt-20190312-005717-v5.0-237-gef428ae55db4

12 files changed, 832 insertions, 25 deletions

diff --git a/Documentation/devicetree/bindings/net/qcom,ethqos.txt b/Documentation/devicetree/bindings/net/qcom,ethqos.txt
new file mode 100644
index 000000000000..fcf5035810b5
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/qcom,ethqos.txt
@@ -0,0 +1,64 @@
+Qualcomm Ethernet ETHQOS device
+
+This documents dwmmac based ethernet device which supports Gigabit
+ethernet for version v2.3.0 onwards.
+
+This device has following properties:
+
+Required properties:
+
+- compatible: Should be qcom,qcs404-ethqos"
+
+- reg: Address and length of the register set for the device
+
+- reg-names: Should contain register names "stmmaceth", "rgmii"
+
+- clocks: Should contain phandle to clocks
+
+- clock-names: Should contain clock names "stmmaceth", "pclk",
+		"ptp_ref", "rgmii"
+
+- interrupts: Should contain phandle to interrupts
+
+- interrupt-names: Should contain interrupt names "macirq", "eth_lpi"
+
+Rest of the properties are defined in stmmac.txt file in same directory
+
+
+Example:
+
+ethernet: ethernet@7a80000 {
+	compatible = "qcom,qcs404-ethqos";
+	reg = <0x07a80000 0x10000>,
+		<0x07a96000 0x100>;
+	reg-names = "stmmaceth", "rgmii";
+	clock-names = "stmmaceth", "pclk", "ptp_ref", "rgmii";
+	clocks = <&gcc GCC_ETH_AXI_CLK>,
+		<&gcc GCC_ETH_SLAVE_AHB_CLK>,
+		<&gcc GCC_ETH_PTP_CLK>,
+		<&gcc GCC_ETH_RGMII_CLK>;
+	interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
+			<GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
+	interrupt-names = "macirq", "eth_lpi";
+	snps,reset-gpio = <&tlmm 60 GPIO_ACTIVE_LOW>;
+	snps,reset-active-low;
+
+	snps,txpbl = <8>;
+	snps,rxpbl = <2>;
+	snps,aal;
+	snps,tso;
+
+	phy-handle = <&phy1>;
+	phy-mode = "rgmii";
+
+	mdio {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+		compatible = "snps,dwmac-mdio";
+		phy1: phy@4 {
+			device_type = "ethernet-phy";
+			reg = <0x4>;
+		};
+	};
+
+};
diff --git a/MAINTAINERS b/MAINTAINERS
index c688d87cf7ae..acced8739539 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12634,6 +12634,14 @@ L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/ethernet/qualcomm/emac/
 
+QUALCOMM ETHQOS ETHERNET DRIVER
+M:	Vinod Koul <vkoul@kernel.org>
+M:	Niklas Cassel <niklas.cassel@linaro.org>
+L:	netdev@vger.kernel.org
+S:	Maintained
+F:	drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
+F:	Documentation/devicetree/bindings/net/qcom,dwmac.txt
+
 QUALCOMM GENERIC INTERFACE I2C DRIVER
 M:	Alok Chauhan <alokc@codeaurora.org>
 M:	Karthikeyan Ramasubramanian <kramasub@codeaurora.org>
diff --git a/arch/arm64/boot/dts/qcom/qcs404-evb-4000.dts b/arch/arm64/boot/dts/qcom/qcs404-evb-4000.dts
index 11269ad3de0d..4dc26a783ac7 100644
--- a/arch/arm64/boot/dts/qcom/qcs404-evb-4000.dts
+++ b/arch/arm64/boot/dts/qcom/qcs404-evb-4000.dts
@@ -3,9 +3,155 @@
 
 /dts-v1/;
 
+#include <dt-bindings/gpio/gpio.h>
 #include "qcs404-evb.dtsi"
 
 / {
 	model = "Qualcomm Technologies, Inc. QCS404 EVB 4000";
 	compatible = "qcom,qcs404-evb";
 };
+
+#define AR8035
+
+&ethernet {
+	status = "ok";
+
+	snps,reset-gpio = <&tlmm 60 GPIO_ACTIVE_LOW>;
+	snps,reset-active-low;
+	snps,reset-delays-us = <0 10000 10000>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&ethernet_defaults>;
+
+#ifdef AR8035
+	phy-handle = <&phy1>;
+	phy-mode = "rgmii";
+	mdio {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+		compatible = "snps,dwmac-mdio";
+		phy1: phy@4 {
+			device_type = "ethernet-phy";
+			reg = <0x4>;
+		};
+	};
+#endif
+
+#ifdef QCA8K
+	phy-mode = "rgmii";
+
+	fixed-link {
+		speed = <1000>;
+		full-duplex;
+	};
+
+	mdio {
+		#address-cells = <0x1>;
+		#size-cells = <0x0>;
+		compatible = "snps,dwmac-mdio";
+
+		phy_port2: phy@1 {
+			reg = <1>;
+		};
+
+		phy_port3: phy@2 {
+			reg = <2>;
+		};
+
+		switch0@16 {
+			compatible = "qca,qca8334";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			reg = <16>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				cpu_port1: port@0 {
+					reg = <0>;
+					label = "cpu";
+					ethernet = <&ethernet>;
+					phy-mode = "rgmii";
+					fixed-link {
+						speed = <1000>;
+						full-duplex;
+					};
+				};
+
+				port@2 {
+					reg = <2>;
+					label = "top";
+					cpu = <&cpu_port1>;
+					phy-handle = <&phy_port2>;
+				};
+
+				port@3 {
+					reg = <3>;
+					label = "bottom";
+					cpu = <&cpu_port1>;
+					phy-handle = <&phy_port3>;
+				};
+			};
+		};
+	};
+#endif
+
+};
+
+&tlmm {
+	ethernet_defaults: ethernet-defaults {
+		int {
+			pins = "gpio61";
+			function = "rgmii_int";
+			bias-disable;
+			drive-strength = <2>;
+		};
+		mdc {
+			pins = "gpio76";
+			function = "rgmii_mdc";
+			bias-pull-up;
+		};
+		mdio {
+			pins = "gpio75";
+			function = "rgmii_mdio";
+			bias-pull-up;
+		};
+		tx {
+			pins = "gpio67", "gpio66", "gpio65", "gpio64";
+			function = "rgmii_tx";
+			bias-pull-up;
+			drive-strength = <16>;
+		};
+		rx {
+			pins = "gpio73", "gpio72", "gpio71", "gpio70";
+			function = "rgmii_rx";
+			bias-disable;
+			drive-strength = <2>;
+		};
+		tx-ctl {
+			pins = "gpio68";
+			function = "rgmii_ctl";
+			bias-pull-up;
+			drive-strength = <16>;
+		};
+		rx-ctl {
+			pins = "gpio74";
+			function = "rgmii_ctl";
+			bias-disable;
+			drive-strength = <2>;
+		};
+		tx-ck {
+			pins = "gpio63";
+			function = "rgmii_ck";
+			bias-pull-up;
+			drive-strength = <16>;
+		};
+		rx-ck {
+			pins = "gpio69";
+			function = "rgmii_ck";
+			bias-disable;
+			drive-strength = <2>;
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/qcom/qcs404.dtsi b/arch/arm64/boot/dts/qcom/qcs404.dtsi
index 8826a153702e..d27a2a579365 100644
--- a/arch/arm64/boot/dts/qcom/qcs404.dtsi
+++ b/arch/arm64/boot/dts/qcom/qcs404.dtsi
@@ -598,6 +598,30 @@
 			status = "okay";
 		};
 
+		ethernet: ethernet@7a80000 {
+			compatible = "qcom,qcs404-ethqos";
+			reg = <0x07a80000 0x10000>,
+				<0x07a96000 0x100>;
+			reg-names = "stmmaceth", "rgmii";
+			clock-names = "stmmaceth", "pclk", "ptp_ref", "rgmii";
+			clocks = <&gcc GCC_ETH_AXI_CLK>,
+				<&gcc GCC_ETH_SLAVE_AHB_CLK>,
+				<&gcc GCC_ETH_PTP_CLK>,
+				<&gcc GCC_ETH_RGMII_CLK>;
+			interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
+					<GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "macirq", "eth_lpi";
+
+			snps,txpbl = <8>;
+			snps,rxpbl = <2>;
+			snps,aal;
+			snps,tso;
+			rx-fifo-depth=<4096>;
+			tx-fifo-depth=<4096>;
+
+			status = "disabled";
+		};
+
 		intc: interrupt-controller@b000000 {
 			compatible = "qcom,msm-qgic2";
 			interrupt-controller;
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index c4ac938b107b..133939709b1c 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -148,7 +148,7 @@ CONFIG_IP_MULTICAST=y
 CONFIG_IP_PNP=y
 CONFIG_IP_PNP_DHCP=y
 CONFIG_IP_PNP_BOOTP=y
-CONFIG_IPV6=m
+CONFIG_IPV6=y
 CONFIG_NETFILTER=y
 CONFIG_NF_CONNTRACK=m
 CONFIG_NF_CONNTRACK_EVENTS=y
@@ -168,7 +168,7 @@ CONFIG_IP6_NF_TARGET_REJECT=m
 CONFIG_IP6_NF_MANGLE=m
 CONFIG_IP6_NF_NAT=m
 CONFIG_IP6_NF_TARGET_MASQUERADE=m
-CONFIG_BRIDGE=m
+CONFIG_BRIDGE=y
 CONFIG_BRIDGE_VLAN_FILTERING=y
 CONFIG_VLAN_8021Q=m
 CONFIG_VLAN_8021Q_GVRP=y
@@ -250,6 +250,9 @@ CONFIG_MACVTAP=m
 CONFIG_TUN=y
 CONFIG_VETH=m
 CONFIG_VIRTIO_NET=y
+CONFIG_NET_DSA=y
+CONFIG_NET_DSA_QCA8K=y
+CONFIG_ETHERNET=y
 CONFIG_AMD_XGBE=y
 CONFIG_NET_XGENE=y
 CONFIG_ATL1C=y
@@ -274,6 +277,8 @@ CONFIG_SMSC911X=y
 CONFIG_SNI_AVE=y
 CONFIG_SNI_NETSEC=y
 CONFIG_STMMAC_ETH=m
+CONFIG_STMMAC_PLATFORM=m
+CONFIG_DWMAC_QCOM_ETHQOS=m
 CONFIG_MDIO_BUS_MUX_MMIOREG=y
 CONFIG_AT803X_PHY=m
 CONFIG_MARVELL_PHY=m
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 7e97e620bd44..a4b6cda38016 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -420,7 +420,7 @@ qca8k_mib_init(struct qca8k_priv *priv)
 static int
 qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode)
 {
-	u32 reg;
+	u32 reg, val;
 
 	switch (port) {
 	case 0:
@@ -439,17 +439,9 @@ qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode)
 	 */
 	switch (mode) {
 	case PHY_INTERFACE_MODE_RGMII:
-		qca8k_write(priv, reg,
-			    QCA8K_PORT_PAD_RGMII_EN |
-			    QCA8K_PORT_PAD_RGMII_TX_DELAY(3) |
-			    QCA8K_PORT_PAD_RGMII_RX_DELAY(3));
-
-		/* According to the datasheet, RGMII delay is enabled through
-		 * PORT5_PAD_CTRL for all ports, rather than individual port
-		 * registers
-		 */
-		qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL,
-			    QCA8K_PORT_PAD_RGMII_RX_DELAY_EN);
+		/* RGMII mode means no delay so don't enable the delay */
+		val = QCA8K_PORT_PAD_RGMII_EN;
+		qca8k_write(priv, reg, val);
 		break;
 	case PHY_INTERFACE_MODE_SGMII:
 		qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN);
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 6209cc1fb305..f194235153f9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -105,6 +105,16 @@ config DWMAC_OXNAS
 	  This selects the Oxford Semiconductor OXNASSoC glue layer support for
 	  the stmmac device driver. This driver is used for OX820.
 
+config DWMAC_QCOM_ETHQOS
+	tristate "Qualcomm ETHQOS support"
+	default ARCH_QCOM
+	depends on OF && (ARCH_QCOM || COMPILE_TEST)
+	help
+	  Support for the Qualcomm ETHQOS core.
+
+	  This selects the Qualcomm ETHQOS glue layer support for the
+	  stmmac device driver.
+
 config DWMAC_ROCKCHIP
 	tristate "Rockchip dwmac support"
 	default ARCH_ROCKCHIP
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index bf09701d2623..c529c21e9bdd 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_DWMAC_LPC18XX)	+= dwmac-lpc18xx.o
 obj-$(CONFIG_DWMAC_MEDIATEK)	+= dwmac-mediatek.o
 obj-$(CONFIG_DWMAC_MESON)	+= dwmac-meson.o dwmac-meson8b.o
 obj-$(CONFIG_DWMAC_OXNAS)	+= dwmac-oxnas.o
+obj-$(CONFIG_DWMAC_QCOM_ETHQOS)	+= dwmac-qcom-ethqos.o
 obj-$(CONFIG_DWMAC_ROCKCHIP)	+= dwmac-rk.o
 obj-$(CONFIG_DWMAC_SOCFPGA)	+= dwmac-altr-socfpga.o
 obj-$(CONFIG_DWMAC_STI)		+= dwmac-sti.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
new file mode 100644
index 000000000000..30724bd330f4
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
@@ -0,0 +1,545 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018-19, Linaro Limited
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/phy.h>
+#include "stmmac.h"
+#include "stmmac_platform.h"
+
+#define RGMII_IO_MACRO_CONFIG		0x0
+#define SDCC_HC_REG_DLL_CONFIG		0x4
+#define SDCC_HC_REG_DDR_CONFIG		0xC
+#define SDCC_HC_REG_DLL_CONFIG2		0x10
+#define SDC4_STATUS			0x14
+#define SDCC_USR_CTL			0x18
+#define RGMII_IO_MACRO_CONFIG2		0x1C
+#define RGMII_IO_MACRO_DEBUG1		0x20
+#define EMAC_SYSTEM_LOW_POWER_DEBUG	0x28
+
+/* RGMII_IO_MACRO_CONFIG fields */
+#define RGMII_CONFIG_FUNC_CLK_EN		BIT(30)
+#define RGMII_CONFIG_POS_NEG_DATA_SEL		BIT(23)
+#define RGMII_CONFIG_GPIO_CFG_RX_INT		GENMASK(21, 20)
+#define RGMII_CONFIG_GPIO_CFG_TX_INT		GENMASK(19, 17)
+#define RGMII_CONFIG_MAX_SPD_PRG_9		GENMASK(16, 8)
+#define RGMII_CONFIG_MAX_SPD_PRG_2		GENMASK(7, 6)
+#define RGMII_CONFIG_INTF_SEL			GENMASK(5, 4)
+#define RGMII_CONFIG_BYPASS_TX_ID_EN		BIT(3)
+#define RGMII_CONFIG_LOOPBACK_EN		BIT(2)
+#define RGMII_CONFIG_PROG_SWAP			BIT(1)
+#define RGMII_CONFIG_DDR_MODE			BIT(0)
+
+/* SDCC_HC_REG_DLL_CONFIG fields */
+#define SDCC_DLL_CONFIG_DLL_RST			BIT(30)
+#define SDCC_DLL_CONFIG_PDN			BIT(29)
+#define SDCC_DLL_CONFIG_MCLK_FREQ		GENMASK(26, 24)
+#define SDCC_DLL_CONFIG_CDR_SELEXT		GENMASK(23, 20)
+#define SDCC_DLL_CONFIG_CDR_EXT_EN		BIT(19)
+#define SDCC_DLL_CONFIG_CK_OUT_EN		BIT(18)
+#define SDCC_DLL_CONFIG_CDR_EN			BIT(17)
+#define SDCC_DLL_CONFIG_DLL_EN			BIT(16)
+#define SDCC_DLL_MCLK_GATING_EN			BIT(5)
+#define SDCC_DLL_CDR_FINE_PHASE			GENMASK(3, 2)
+
+/* SDCC_HC_REG_DDR_CONFIG fields */
+#define SDCC_DDR_CONFIG_PRG_DLY_EN		BIT(31)
+#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY	GENMASK(26, 21)
+#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE	GENMASK(29, 27)
+#define SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN	BIT(30)
+#define SDCC_DDR_CONFIG_PRG_RCLK_DLY		GENMASK(8, 0)
+
+/* SDCC_HC_REG_DLL_CONFIG2 fields */
+#define SDCC_DLL_CONFIG2_DLL_CLOCK_DIS		BIT(21)
+#define SDCC_DLL_CONFIG2_MCLK_FREQ_CALC		GENMASK(17, 10)
+#define SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL	GENMASK(3, 2)
+#define SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW	BIT(1)
+#define SDCC_DLL_CONFIG2_DDR_CAL_EN		BIT(0)
+
+/* SDC4_STATUS bits */
+#define SDC4_STATUS_DLL_LOCK			BIT(7)
+
+/* RGMII_IO_MACRO_CONFIG2 fields */
+#define RGMII_CONFIG2_RSVD_CONFIG15		GENMASK(31, 17)
+#define RGMII_CONFIG2_RGMII_CLK_SEL_CFG		BIT(16)
+#define RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN	BIT(13)
+#define RGMII_CONFIG2_CLK_DIVIDE_SEL		BIT(12)
+#define RGMII_CONFIG2_RX_PROG_SWAP		BIT(7)
+#define RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL	BIT(6)
+#define RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN	BIT(5)
+
+struct ethqos_emac_por {
+	unsigned int offset;
+	unsigned int value;
+};
+
+struct qcom_ethqos {
+	struct platform_device *pdev;
+	void __iomem *rgmii_base;
+
+	unsigned int rgmii_clk_rate;
+	struct clk *rgmii_clk;
+	unsigned int speed;
+
+	const struct ethqos_emac_por *por;
+	unsigned int num_por;
+};
+
+static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset)
+{
+	return readl(ethqos->rgmii_base + offset);
+}
+
+static void rgmii_writel(struct qcom_ethqos *ethqos,
+			 int value, unsigned int offset)
+{
+	writel(value, ethqos->rgmii_base + offset);
+}
+
+static void rgmii_updatel(struct qcom_ethqos *ethqos,
+			  int mask, int val, unsigned int offset)
+{
+	unsigned int temp;
+
+	temp =  rgmii_readl(ethqos, offset);
+	temp = (temp & ~(mask)) | val;
+	rgmii_writel(ethqos, temp, offset);
+}
+
+static void rgmii_dump(struct qcom_ethqos *ethqos)
+{
+	dev_dbg(&ethqos->pdev->dev, "Rgmii register dump\n");
+	dev_dbg(&ethqos->pdev->dev, "RGMII_IO_MACRO_CONFIG: %x\n",
+		rgmii_readl(ethqos, RGMII_IO_MACRO_CONFIG));
+	dev_dbg(&ethqos->pdev->dev, "SDCC_HC_REG_DLL_CONFIG: %x\n",
+		rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG));
+	dev_dbg(&ethqos->pdev->dev, "SDCC_HC_REG_DDR_CONFIG: %x\n",
+		rgmii_readl(ethqos, SDCC_HC_REG_DDR_CONFIG));
+	dev_dbg(&ethqos->pdev->dev, "SDCC_HC_REG_DLL_CONFIG2: %x\n",
+		rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG2));
+	dev_dbg(&ethqos->pdev->dev, "SDC4_STATUS: %x\n",
+		rgmii_readl(ethqos, SDC4_STATUS));
+	dev_dbg(&ethqos->pdev->dev, "SDCC_USR_CTL: %x\n",
+		rgmii_readl(ethqos, SDCC_USR_CTL));
+	dev_dbg(&ethqos->pdev->dev, "RGMII_IO_MACRO_CONFIG2: %x\n",
+		rgmii_readl(ethqos, RGMII_IO_MACRO_CONFIG2));
+	dev_dbg(&ethqos->pdev->dev, "RGMII_IO_MACRO_DEBUG1: %x\n",
+		rgmii_readl(ethqos, RGMII_IO_MACRO_DEBUG1));
+	dev_dbg(&ethqos->pdev->dev, "EMAC_SYSTEM_LOW_POWER_DEBUG: %x\n",
+		rgmii_readl(ethqos, EMAC_SYSTEM_LOW_POWER_DEBUG));
+}
+
+/* Clock rates */
+#define RGMII_1000_NOM_CLK_FREQ			(250 * 1000 * 1000UL)
+#define RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ	 (50 * 1000 * 1000UL)
+#define RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ	  (5 * 1000 * 1000UL)
+
+static void
+ethqos_update_rgmii_clk(struct qcom_ethqos *ethqos, unsigned int speed)
+{
+	switch (speed) {
+	case SPEED_1000:
+		ethqos->rgmii_clk_rate =  RGMII_1000_NOM_CLK_FREQ;
+		break;
+
+	case SPEED_100:
+		ethqos->rgmii_clk_rate =  RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ;
+		break;
+
+	case SPEED_10:
+		ethqos->rgmii_clk_rate =  RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ;
+		break;
+	}
+
+	clk_set_rate(ethqos->rgmii_clk, ethqos->rgmii_clk_rate);
+}
+
+static void ethqos_set_func_clk_en(struct qcom_ethqos *ethqos)
+{
+	rgmii_updatel(ethqos, RGMII_CONFIG_FUNC_CLK_EN,
+		      RGMII_CONFIG_FUNC_CLK_EN, RGMII_IO_MACRO_CONFIG);
+}
+
+static const struct ethqos_emac_por emac_v2_3_0_por[] = {
+	{ .offset = RGMII_IO_MACRO_CONFIG,	.value = 0x00C01343 },
+	{ .offset = SDCC_HC_REG_DLL_CONFIG,	.value = 0x2004642C },
+	{ .offset = SDCC_HC_REG_DDR_CONFIG,	.value = 0x00000000 },
+	{ .offset = SDCC_HC_REG_DLL_CONFIG2,	.value = 0x00200000 },
+	{ .offset = SDCC_USR_CTL,		.value = 0x00010800 },
+	{ .offset = RGMII_IO_MACRO_CONFIG2,	.value = 0x00002060 },
+};
+
+static int ethqos_dll_configure(struct qcom_ethqos *ethqos)
+{
+	unsigned int val;
+	int retry = 1000;
+
+	/* Set CDR_EN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EN,
+		      SDCC_DLL_CONFIG_CDR_EN, SDCC_HC_REG_DLL_CONFIG);
+
+	/* Set CDR_EXT_EN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CDR_EXT_EN,
+		      SDCC_DLL_CONFIG_CDR_EXT_EN, SDCC_HC_REG_DLL_CONFIG);
+
+	/* Clear CK_OUT_EN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+		      0, SDCC_HC_REG_DLL_CONFIG);
+
+	/* Set DLL_EN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
+		      SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
+
+	rgmii_updatel(ethqos, SDCC_DLL_MCLK_GATING_EN,
+		      0, SDCC_HC_REG_DLL_CONFIG);
+
+	rgmii_updatel(ethqos, SDCC_DLL_CDR_FINE_PHASE,
+		      0, SDCC_HC_REG_DLL_CONFIG);
+
+	/* Wait for CK_OUT_EN clear */
+	do {
+		val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
+		val &= SDCC_DLL_CONFIG_CK_OUT_EN;
+		if (!val)
+			break;
+		mdelay(1);
+		retry--;
+	} while (retry > 0);
+	if (!retry)
+		dev_err(&ethqos->pdev->dev, "Clear CK_OUT_EN timedout\n");
+
+	/* Set CK_OUT_EN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+		      SDCC_DLL_CONFIG_CK_OUT_EN, SDCC_HC_REG_DLL_CONFIG);
+
+	/* Wait for CK_OUT_EN set */
+	retry = 1000;
+	do {
+		val = rgmii_readl(ethqos, SDCC_HC_REG_DLL_CONFIG);
+		val &= SDCC_DLL_CONFIG_CK_OUT_EN;
+		if (val)
+			break;
+		mdelay(1);
+		retry--;
+	} while (retry > 0);
+	if (!retry)
+		dev_err(&ethqos->pdev->dev, "Set CK_OUT_EN timedout\n");
+
+	/* Set DDR_CAL_EN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_CAL_EN,
+		      SDCC_DLL_CONFIG2_DDR_CAL_EN, SDCC_HC_REG_DLL_CONFIG2);
+
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DLL_CLOCK_DIS,
+		      0, SDCC_HC_REG_DLL_CONFIG2);
+
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_MCLK_FREQ_CALC,
+		      0x1A << 10, SDCC_HC_REG_DLL_CONFIG2);
+
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SEL,
+		      BIT(2), SDCC_HC_REG_DLL_CONFIG2);
+
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
+		      SDCC_DLL_CONFIG2_DDR_TRAFFIC_INIT_SW,
+		      SDCC_HC_REG_DLL_CONFIG2);
+
+	return 0;
+}
+
+static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos)
+{
+	/* Disable loopback mode */
+	rgmii_updatel(ethqos, RGMII_CONFIG2_TX_TO_RX_LOOPBACK_EN,
+		      0, RGMII_IO_MACRO_CONFIG2);
+
+	/* Select RGMII, write 0 to interface select */
+	rgmii_updatel(ethqos, RGMII_CONFIG_INTF_SEL,
+		      0, RGMII_IO_MACRO_CONFIG);
+
+	switch (ethqos->speed) {
+	case SPEED_1000:
+		rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
+			      RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      0, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
+			      RGMII_CONFIG_POS_NEG_DATA_SEL,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
+			      RGMII_CONFIG_PROG_SWAP, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+			      RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+			      RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+			      RGMII_CONFIG2_RX_PROG_SWAP,
+			      RGMII_IO_MACRO_CONFIG2);
+
+		/* Set PRG_RCLK_DLY to 57 for 1.8 ns delay */
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_RCLK_DLY,
+			      57, SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN,
+			      SDCC_DDR_CONFIG_PRG_DLY_EN,
+			      SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+			      RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
+		break;
+
+	case SPEED_100:
+		rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
+			      RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
+			      0, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
+			      0, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+			      RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+			      RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_2,
+			      BIT(6), RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		/* Write 0x5 to PRG_RCLK_DLY_CODE */
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
+			      (BIT(29) | BIT(27)), SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+			      SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+			      SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+			      RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
+		break;
+
+	case SPEED_10:
+		rgmii_updatel(ethqos, RGMII_CONFIG_DDR_MODE,
+			      RGMII_CONFIG_DDR_MODE, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      RGMII_CONFIG_BYPASS_TX_ID_EN,
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_POS_NEG_DATA_SEL,
+			      0, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_PROG_SWAP,
+			      0, RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_DATA_DIVIDE_CLK_SEL,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG_MAX_SPD_PRG_9,
+			      BIT(12) | GENMASK(9, 8),
+			      RGMII_IO_MACRO_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_RSVD_CONFIG15,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		rgmii_updatel(ethqos, RGMII_CONFIG2_RX_PROG_SWAP,
+			      0, RGMII_IO_MACRO_CONFIG2);
+		/* Write 0x5 to PRG_RCLK_DLY_CODE */
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_CODE,
+			      (BIT(29) | BIT(27)), SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY,
+			      SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+			      SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN,
+			      SDCC_HC_REG_DDR_CONFIG);
+		rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN,
+			      RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG);
+		break;
+	default:
+		dev_err(&ethqos->pdev->dev,
+			"Invalid speed %d\n", ethqos->speed);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ethqos_configure(struct qcom_ethqos *ethqos)
+{
+	volatile unsigned int dll_lock;
+	unsigned int i, retry = 1000;
+
+	/* Reset to POR values and enable clk */
+	for (i = 0; i < ethqos->num_por; i++)
+		rgmii_writel(ethqos, ethqos->por[i].value,
+			     ethqos->por[i].offset);
+	ethqos_set_func_clk_en(ethqos);
+
+	/* Initialize the DLL first */
+
+	/* Set DLL_RST */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_RST,
+		      SDCC_DLL_CONFIG_DLL_RST, SDCC_HC_REG_DLL_CONFIG);
+
+	/* Set PDN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_PDN,
+		      SDCC_DLL_CONFIG_PDN, SDCC_HC_REG_DLL_CONFIG);
+
+	/* Clear DLL_RST */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_RST, 0,
+		      SDCC_HC_REG_DLL_CONFIG);
+
+	/* Clear PDN */
+	rgmii_updatel(ethqos, SDCC_DLL_CONFIG_PDN, 0,
+		      SDCC_HC_REG_DLL_CONFIG);
+
+	if (ethqos->speed != SPEED_100 && ethqos->speed != SPEED_10) {
+		/* Set DLL_EN */
+		rgmii_updatel(ethqos, SDCC_DLL_CONFIG_DLL_EN,
+			      SDCC_DLL_CONFIG_DLL_EN, SDCC_HC_REG_DLL_CONFIG);
+
+		/* Set CK_OUT_EN */
+		rgmii_updatel(ethqos, SDCC_DLL_CONFIG_CK_OUT_EN,
+			      SDCC_DLL_CONFIG_CK_OUT_EN,
+			      SDCC_HC_REG_DLL_CONFIG);
+
+		/* Set USR_CTL bit 26 with mask of 3 bits */
+		rgmii_updatel(ethqos, GENMASK(26, 24), BIT(26), SDCC_USR_CTL);
+
+		/* wait for DLL LOCK */
+		do {
+			mdelay(1);
+			dll_lock = rgmii_readl(ethqos, SDC4_STATUS);
+			if (dll_lock & SDC4_STATUS_DLL_LOCK)
+				break;
+		} while (retry > 0);
+		if (!retry)
+			dev_err(&ethqos->pdev->dev,
+				"Timeout while waiting for DLL lock\n");
+	}
+
+	if (ethqos->speed == SPEED_1000)
+		ethqos_dll_configure(ethqos);
+
+	ethqos_rgmii_macro_init(ethqos);
+
+	return 0;
+}
+
+static void ethqos_fix_mac_speed(void *priv, unsigned int speed)
+{
+	struct qcom_ethqos *ethqos = priv;
+
+	ethqos->speed = speed;
+	ethqos_update_rgmii_clk(ethqos, speed);
+	ethqos_configure(ethqos);
+}
+
+static int qcom_ethqos_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct plat_stmmacenet_data *plat_dat;
+	struct stmmac_resources stmmac_res;
+	struct qcom_ethqos *ethqos;
+	struct resource *res;
+	int ret;
+
+	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
+	if (ret)
+		return ret;
+
+	plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
+	if (IS_ERR(plat_dat)) {
+		dev_err(&pdev->dev, "dt configuration failed\n");
+		return PTR_ERR(plat_dat);
+	}
+
+	ethqos = devm_kzalloc(&pdev->dev, sizeof(*ethqos), GFP_KERNEL);
+	if (!ethqos) {
+		ret = -ENOMEM;
+		goto err_mem;
+	}
+
+	ethqos->pdev = pdev;
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rgmii");
+	ethqos->rgmii_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(ethqos->rgmii_base)) {
+		dev_err(&pdev->dev, "Can't get rgmii base\n");
+		ret = PTR_ERR(ethqos->rgmii_base);
+		goto err_mem;
+	}
+
+	ethqos->por = of_device_get_match_data(&pdev->dev);
+
+	ethqos->rgmii_clk = devm_clk_get(&pdev->dev, "rgmii");
+	if (!ethqos->rgmii_clk) {
+		ret = -ENOMEM;
+		goto err_mem;
+	}
+
+	ret = clk_prepare_enable(ethqos->rgmii_clk);
+	if (ret)
+		goto err_mem;
+
+	ethqos->speed = SPEED_1000;
+	ethqos_update_rgmii_clk(ethqos, SPEED_1000);
+	ethqos_set_func_clk_en(ethqos);
+
+	plat_dat->bsp_priv = ethqos;
+	plat_dat->fix_mac_speed = ethqos_fix_mac_speed;
+	plat_dat->has_gmac4 = 1;
+	plat_dat->pmt = 1;
+	plat_dat->tso_en = of_property_read_bool(np, "snps,tso");
+
+	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+	if (ret)
+		goto err_clk;
+
+	rgmii_dump(ethqos);
+
+	return ret;
+
+err_clk:
+	clk_disable_unprepare(ethqos->rgmii_clk);
+
+err_mem:
+	stmmac_remove_config_dt(pdev, plat_dat);
+
+	return ret;
+}
+
+static int qcom_ethqos_remove(struct platform_device *pdev)
+{
+	struct qcom_ethqos *ethqos;
+	int ret;
+
+	ethqos = get_stmmac_bsp_priv(&pdev->dev);
+	if (!ethqos)
+		return -ENODEV;
+
+	ret = stmmac_pltfr_remove(pdev);
+	clk_disable_unprepare(ethqos->rgmii_clk);
+
+	return ret;
+}
+
+static const struct of_device_id qcom_ethqos_match[] = {
+	{ .compatible = "qcom,qcs404-ethqos", .data = &emac_v2_3_0_por},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, qcom_ethqos_match);
+
+static struct platform_driver qcom_ethqos_driver = {
+	.probe  = qcom_ethqos_probe,
+	.remove = qcom_ethqos_remove,
+	.driver = {
+		.name           = "qcom-ethqos",
+		.pm		= &stmmac_pltfr_pm_ops,
+		.of_match_table = of_match_ptr(qcom_ethqos_match),
+	},
+};
+module_platform_driver(qcom_ethqos_driver);
+
+MODULE_DESCRIPTION("Qualcomm ETHQOS driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 685d20472358..8929b5743c63 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -159,6 +159,13 @@ static void stmmac_disable_all_queues(struct stmmac_priv *priv)
 	}
 }
 
+static u16 stmmac_select_queue(struct net_device *dev, struct sk_buff *skb,
+			       struct net_device *sb_dev,
+			       select_queue_fallback_t fallback)
+{
+	return 0;
+}
+
 /**
  * stmmac_enable_all_queues - Enable all queues
  * @priv: driver private structure
@@ -4058,6 +4065,7 @@ static const struct net_device_ops stmmac_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller = stmmac_poll_controller,
 #endif
+	.ndo_select_queue = stmmac_select_queue,
 	.ndo_set_mac_address = stmmac_set_mac_address,
 };
 
diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index f9432d053a22..8ff12938ab47 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -110,16 +110,16 @@ static int at803x_debug_reg_mask(struct phy_device *phydev, u16 reg,
 	return phy_write(phydev, AT803X_DEBUG_DATA, val);
 }
 
-static inline int at803x_enable_rx_delay(struct phy_device *phydev)
+static inline int at803x_disable_rx_delay(struct phy_device *phydev)
 {
-	return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0, 0,
-					AT803X_DEBUG_RX_CLK_DLY_EN);
+	return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0,
+				     AT803X_DEBUG_RX_CLK_DLY_EN, 0);
 }
 
-static inline int at803x_enable_tx_delay(struct phy_device *phydev)
+static inline int at803x_disable_tx_delay(struct phy_device *phydev)
 {
-	return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5, 0,
-					AT803X_DEBUG_TX_CLK_DLY_EN);
+	return at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_5,
+				     AT803X_DEBUG_TX_CLK_DLY_EN, 0);
 }
 
 /* save relevant PHY registers to private copy */
@@ -256,15 +256,17 @@ static int at803x_config_init(struct phy_device *phydev)
 		return ret;
 
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID ||
-			phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
-		ret = at803x_enable_rx_delay(phydev);
+			phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+			phydev->interface == PHY_INTERFACE_MODE_RGMII) {
+		ret = at803x_disable_rx_delay(phydev);
 		if (ret < 0)
 			return ret;
 	}
 
 	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID ||
-			phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
-		ret = at803x_enable_tx_delay(phydev);
+			phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+			phydev->interface == PHY_INTERFACE_MODE_RGMII) {
+		ret = at803x_disable_tx_delay(phydev);
 		if (ret < 0)
 			return ret;
 	}
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index a1c9fe155057..115edd4ffe12 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -77,7 +77,9 @@ static int dsa_slave_open(struct net_device *dev)
 	if (!(master->flags & IFF_UP))
 		return -ENETDOWN;
 
-	if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
+	if (!is_valid_ether_addr(dev->dev_addr)) {
+		eth_hw_addr_inherit(dev, master);
+	} else if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
 		err = dev_uc_add(master, dev->dev_addr);
 		if (err < 0)
 			goto out;