linux-kernel - [PATCH 2/2] arm64: dts: ti: k3-j7200: Add overlay to enable CPSW5G ports in QSGMII mode

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Message-ID: <20230310101407.722334-3-s-vadapalli@ti.com>
Date:   Fri, 10 Mar 2023 15:44:07 +0530
From:   Siddharth Vadapalli <s-vadapalli@...com>
To:     <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski@...aro.org>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        <s-vadapalli@...com>
Subject: [PATCH 2/2] arm64: dts: ti: k3-j7200: Add overlay to enable CPSW5G ports in QSGMII mode

The J7 Quad Port Add-On Ethernet Card for J7200 Common-Proc-Board supports
QSGMII mode. Use the overlay to configure CPSW5G ports in QSGMII mode.

Add support to reset the PHY from kernel by using gpio-hog and gpio-reset.

Add aliases for CPSW5G ports to enable kernel to fetch MAC addresses
directly from U-Boot.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
 arch/arm64/boot/dts/ti/Makefile               |   2 +
 .../dts/ti/k3-j7200-quad-port-eth-exp.dtso    | 100 ++++++++++++++++++
 2 files changed, 102 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-j7200-quad-port-eth-exp.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 167bcd9b09b7..04e95377a72a 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -45,7 +45,9 @@ dtb-$(CONFIG_ARCH_K3) += k3-j784s4-evm.dtb
 
 # Enable support for device-tree overlays
 DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
+DTC_FLAGS_k3-j7200-common-proc-board += -@
 DTC_FLAGS_k3-j721e-common-proc-board += -@
 
 # Device-tree overlays
+dtb-$(CONFIG_ARCH_K3) += k3-j7200-quad-port-eth-exp.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-quad-port-eth-exp.dtbo
diff --git a/arch/arm64/boot/dts/ti/k3-j7200-quad-port-eth-exp.dtso b/arch/arm64/boot/dts/ti/k3-j7200-quad-port-eth-exp.dtso
new file mode 100644
index 000000000000..b84f185c0a31
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-j7200-quad-port-eth-exp.dtso
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * DT Overlay for CPSW5G in QSGMII mode using J7 Quad Port ETH EXP Add-On Ethernet Card with
+ * J7200 board.
+ *
+ * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/mux/ti-serdes.h>
+#include <dt-bindings/pinctrl/k3.h>
+
+/ {
+	fragment@101 {
+		target-path = "/";
+		__overlay__ {
+			aliases {
+				ethernet1 = "/bus@...000/ethernet@...0000/ethernet-ports/port@1";
+				ethernet2 = "/bus@...000/ethernet@...0000/ethernet-ports/port@2";
+				ethernet3 = "/bus@...000/ethernet@...0000/ethernet-ports/port@3";
+				ethernet4 = "/bus@...000/ethernet@...0000/ethernet-ports/port@4";
+			};
+		};
+	};
+};
+
+&cpsw0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mdio0_pins_default>;
+};
+
+&cpsw0_port1 {
+	phy-handle = <&cpsw5g_phy0>;
+	phy-mode = "qsgmii";
+	mac-address = [00 00 00 00 00 00];
+	phys = <&cpsw0_phy_gmii_sel 1>;
+};
+
+&cpsw0_port2 {
+	phy-handle = <&cpsw5g_phy1>;
+	phy-mode = "qsgmii";
+	mac-address = [00 00 00 00 00 00];
+	phys = <&cpsw0_phy_gmii_sel 2>;
+};
+
+&cpsw0_port3 {
+	phy-handle = <&cpsw5g_phy2>;
+	phy-mode = "qsgmii";
+	mac-address = [00 00 00 00 00 00];
+	phys = <&cpsw0_phy_gmii_sel 3>;
+};
+
+&cpsw0_port4 {
+	phy-handle = <&cpsw5g_phy3>;
+	phy-mode = "qsgmii";
+	mac-address = [00 00 00 00 00 00];
+	phys = <&cpsw0_phy_gmii_sel 4>;
+};
+
+&cpsw5g_mdio {
+	reset-gpios = <&exp2 17 GPIO_ACTIVE_LOW>;
+	reset-post-delay-us = <120000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	cpsw5g_phy0: ethernet-phy@16 {
+		reg = <16>;
+	};
+	cpsw5g_phy1: ethernet-phy@17 {
+		reg = <17>;
+	};
+	cpsw5g_phy2: ethernet-phy@18 {
+		reg = <18>;
+	};
+	cpsw5g_phy3: ethernet-phy@19 {
+		reg = <19>;
+	};
+};
+
+&exp2 {
+	qsgmii-line-hog {
+		gpio-hog;
+		gpios = <16 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "qsgmii-pwrdn-line";
+	};
+};
+
+&main_pmx0 {
+	mdio0_pins_default: mdio0-pins-default {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x00a8, PIN_OUTPUT, 5) /* (W19) UART8_TXD.MDIO0_MDC */
+			J721E_IOPAD(0x00a4, PIN_INPUT, 5) /* (W14) UART8_RXD.MDIO0_MDIO */
+		>;
+	};
+};
-- 
2.25.1