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@netcube.li>
Link: https://patch.msgid.link/20250831162536.2380589-4-lukas.schmid@netcube.li
[wens@csie.org: fix up pinctrl names for i2c* and i2s_d*;
		fix indentation for gpio-line-names and rmii_pe_pins;
		fix "pre-magnetics" typo in comment]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

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 (file)
index 0000000..544d60c
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-t113s-netcube-nagami.dtsi
@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2025 Lukas Schmid <lukas.schmid@netcube.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>;
+       };
+
+       /* USB0 MUX to switch connect to Card-Edge only after BootROM */
+       usb0_sec_mux: mux-controller{
+               compatible = "gpio-mux";
+               #mux-control-cells = <0>;
+               mux-gpios = <&pio 3 9 GPIO_ACTIVE_HIGH>; /* PD9 */
+               idle-state = <1>; /* USB connected to Card-Edge by default */
+       };
+
+       /* Reset of ESP32 */
+       wifi_pwrseq: wifi-pwrseq {
+               compatible = "mmc-pwrseq-simple";
+               reset-gpios = <&pio 6 9 GPIO_ACTIVE_LOW>; /* PG9 */
+               post-power-on-delay-ms = <1500>;
+               power-off-delay-us = <200>;
+       };
+};
+
+&cpu0 {
+       cpu-supply = <&reg_vcc_core>;
+};
+
+&cpu1 {
+       cpu-supply = <&reg_vcc_core>;
+};
+
+&dcxo {
+       clock-frequency = <24000000>;
+};
+
+&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";
+};
+
+/* Default I2C Interface on Card-Edge */
+&i2c2 {
+       pinctrl-0 = <&i2c2_pd_pins>;
+       pinctrl-names = "default";
+       status = "disabled";
+};
+
+/* Exposed as the QWIIC connector and used by the internal EEPROM */
+&i2c3 {
+       pinctrl-0 = <&i2c3_pg_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>;
+               };
+       };
+};
+
+/* Default I2S Interface on Card-Edge */
+&i2s1 {
+       pinctrl-0 = <&i2s1_pins>, <&i2s1_din0_pin>, <&i2s1_dout0_pin>;
+       pinctrl-names = "default";
+       status = "disabled";
+};
+
+/* Phy is on SoM. MDI signals pre-magnetics are on the card edge */
+&mdio {
+       lan8720a: ethernet-phy@0 {
+               compatible = "ethernet-phy-ieee802.3-c22";
+               reg = <0>;
+       };
+};
+
+/* Default SD Interface on Card-Edge */
+&mmc0 {
+       pinctrl-0 = <&mmc0_pins>;
+       pinctrl-names = "default";
+       status = "disabled";
+};
+
+/* Connected to the on-board ESP32 */
+&mmc1 {
+       pinctrl-0 = <&mmc1_pins>;
+       pinctrl-names = "default";
+       vmmc-supply = <&reg_vcc3v3>;
+       bus-width = <4>;
+       non-removable;
+       mmc-pwrseq = <&wifi_pwrseq>;
+       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-pc-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
+                         "", "", "", "",
+                         "", "USB_SEC_EN", "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";
+};
+
+/* Default SPI Interface on Card-Edge */
+&spi1 {
+       #address-cells = <1>;
+       #size-cells = <0>;
+       pinctrl-0 = <&spi1_pins>, <&spi1_hold_pin>, <&spi1_wp_pin>;
+       pinctrl-names = "default";
+       cs-gpios = <0>;
+       status = "disabled";
+};
+
+/* Connected to the Bootloader/Console of the ESP32 */
+&uart1 {
+       pinctrl-0 = <&uart1_pg6_pins>;
+       pinctrl-names = "default";
+       status = "okay";
+};
+
+/* Console/Debug UART on Card-Edge */
+&uart3 {
+       pinctrl-0 = <&uart3_pb_pins>;
+       pinctrl-names = "default";
+       status = "okay";
+};