linux-kernel - [PATCH v2 3/5] ARM: dts: sunxi: add support for NetCube Systems Nagami SoM

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Message-Id: <20250706183601.157523-4-lukas.schmid@netcube.li>
Date: Sun,  6 Jul 2025 20:35:56 +0200
From: Lukas Schmid <lukas.schmid@...cube.li>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>,
	Maxime Ripard <mripard@...nel.org>
Cc: Lukas Schmid <lukas.schmid@...cube.li>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: [PATCH v2 3/5] ARM: dts: sunxi: add support for NetCube Systems Nagami SoM

NetCube Systems Nagami SoM is a module based around the Allwinner T113s
SoC. It includes the following features and interfaces:

- 128MB DDR3 included in SoC
- 10/100 Mbps Ethernet using LAN8720A phy
- One USB-OTG interface
- One USB-Host interface
- One I2S interface with in and output support
- Two CAN interfaces
- ESP32 over SDIO
- One SPI interface
- I2C EEPROM for MAC address
- One QWIIC I2C Interface with dedicated interrupt pin shared with EEPROM
- One external I2C interface
- SD interface for external SD-Card

Signed-off-by: Lukas Schmid <lukas.schmid@...cube.li>
---
 .../allwinner/sun8i-t113s-netcube-nagami.dtsi | 228 ++++++++++++++++++
 1 file changed, 228 insertions(+)
 create mode 100644 arch/arm/boot/dts/allwinner/sun8i-t113s-netcube-nagami.dtsi

diff --git a/arch/arm/boot/dts/allwinner/sun8i-t113s-netcube-nagami.dtsi b/arch/arm/boot/dts/allwinner/sun8i-t113s-netcube-nagami.dtsi
new file mode 100644
index 000000000..1b3e63196
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-t113s-netcube-nagami.dtsi
@@ -0,0 +1,228 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2025 Lukas Schmid <lukas.schmid@...cube.li>
+ */
+
+/dts-v1/;
+#include "sun8i-t113s.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	model = "NetCube Systems Nagami SoM";
+	compatible = "netcube,nagami", "allwinner,sun8i-t113s";
+
+	aliases {
+		serial1 = &uart1; // ESP32 Bootloader UART
+		serial3 = &uart3; // Console UART on Card Edge
+		ethernet0 = &emac;
+	};
+
+	chosen {
+		stdout-path = "serial3:115200n8";
+	};
+
+	/* module wide 3.3V supply directly from the card edge */
+	reg_vcc3v3: regulator-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc-3v3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	/* SY8008 DC/DC regulator on the board, also supplying VDD-SYS */
+	reg_vcc_core: regulator-core {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc-core";
+		regulator-min-microvolt = <880000>;
+		regulator-max-microvolt = <880000>;
+		vin-supply = <&reg_vcc3v3>;
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&reg_vcc_core>;
+};
+
+&cpu1 {
+	cpu-supply = <&reg_vcc_core>;
+};
+
+&emac {
+	nvmem-cells = <&eth0_macaddress>;
+	nvmem-cell-names = "mac-address";
+	phy-handle = <&lan8720a>;
+	phy-mode = "rmii";
+	pinctrl-0 = <&rmii_pe_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+/* Exposed as I2C on the card edge */
+&i2c2 {
+	pinctrl-0 = <&i2c2_pins>;
+	pinctrl-names = "default";
+};
+
+/* Exposed as the QWIIC connector and used by the internal EEPROM */
+&i2c3 {
+	pinctrl-0 = <&i2c3_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	eeprom0: eeprom@50 {
+		compatible = "atmel,24c02";		/* actually it's a 24AA02E48 */
+		reg = <0x50>;
+		pagesize = <16>;
+		read-only;
+		vcc-supply = <&reg_vcc3v3>;
+
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		eth0_macaddress: macaddress@fa {
+			reg = <0xfa 0x06>;
+		};
+	};
+};
+
+/* Exposed as I2S on the card edge */
+&i2s1 {
+	pinctrl-0 = <&i2s1_pins>, <&i2s1_din_pins>, <&i2s1_dout_pins>;
+	pinctrl-names = "default";
+};
+
+/* Phy is on SoM. MDI signals pre-magentics are on the card edge */
+&mdio {
+	lan8720a: ethernet-phy@0 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0>;
+	};
+};
+
+/* Exposed as SD on the card edge */
+&mmc0 {
+	pinctrl-0 = <&mmc0_pins>;
+	pinctrl-names = "default";
+	vmmc-supply = <&reg_vcc3v3>;
+	broken-cd;
+	disable-wp;
+	bus-width = <4>;
+};
+
+/* Connected to the on-board ESP32 */
+&mmc1 {
+	pinctrl-0 = <&mmc1_pins>;
+	pinctrl-names = "default";
+	vmmc-supply = <&reg_vcc3v3>;
+	bus-width = <4>;
+	non-removable;
+	status = "okay";
+};
+
+/* Connected to the on-board eMMC */
+&mmc2 {
+	pinctrl-0 = <&mmc2_pins>;
+	pinctrl-names = "default";
+	vmmc-supply = <&reg_vcc3v3>;
+	vqmmc-supply = <&reg_vcc3v3>;
+	bus-width = <4>;
+	non-removable;
+	status = "okay";
+};
+
+&pio {
+	vcc-pb-supply = <&reg_vcc3v3>;
+	vcc-pd-supply = <&reg_vcc3v3>;
+	vcc-pe-supply = <&reg_vcc3v3>;
+	vcc-pf-supply = <&reg_vcc3v3>;
+	vcc-pg-supply = <&reg_vcc3v3>;
+
+	gpio-line-names = "", "", "", "", // PA
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "CAN0_TX", "CAN0_RX", // PB
+					  "CAN1_TX", "CAN1_RX", "UART3_TX", "UART3_RX",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "eMMC_CLK", "eMMC_CMD", // PC
+					  "eMMC_D2", "eMMC_D1", "eMMC_D0", "eMMC_D3",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "", // PD
+					  "", "", "", "",
+					  "", "", "SPI1_CS", "SPI1_CLK",
+					  "SPI1_MOSI", "SPI1_MISO", "SPI1_HOLD", "SPI1_WP",
+					  "PD16", "", "", "",
+					  "I2C2_SCL", "I2C2_SDA", "PD22", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "ETH_CRSDV", "ETH_RXD0", "ETH_RXD1", "ETH_TXCK", // PE
+					  "ETH_TXD0", "ETH_TXD1", "ETH_TXEN", "",
+					  "ETH_MDC", "ETH_MDIO", "QWIIC_nINT", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "SD_D1", "SD_D0", "SD_CLK", "SD_CLK", // PF
+					  "SD_D3", "SD_D2", "PF6", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "ESP_CLK", "ESP_CMD", "ESP_D0", "ESP_D1", // PG
+					  "ESP_D2", "ESP_D3", "UART1_TXD", "UART1_RXD",
+					  "ESP_nBOOT", "ESP_nRST", "I2C3_SCL", "I2C3_SDA",
+					  "I2S1_WS", "I2S1_CLK", "I2S1_DIN0", "I2S1_DOUT0",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "",
+					  "", "", "", "";
+};
+
+/* Remove the unused CK pin from the pinctl as it is unconnected */
+&rmii_pe_pins {
+	pins = "PE0", "PE1", "PE2", "PE3", "PE4",
+		   "PE5", "PE6", "PE8", "PE9";
+};
+
+/* Exposed as SPI on the card-edge */
+&spi1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-0 = <&spi1_pins>;
+	pinctrl-names = "default";
+	cs-gpios = <0>;
+};
+
+/* Connected to the Bootloader/Console of the ESP32 */
+&uart1 {
+	pinctrl-0 = <&uart1_pg6_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+/* Exposed as the Console/Debug UART on the card-edge */
+&uart3 {
+	pinctrl-0 = <&uart3_pb_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
-- 
2.39.5