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+From e6619c1d068dea0d4d29cf770a85bb8bfcfd104b Mon Sep 17 00:00:00 2001
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+From: Linus Walleij <[email protected]>
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+Date: Thu, 12 Feb 2026 00:17:53 +0100
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+Subject: [PATCH 1/2] ARM: dts: Add a Raidsonic IB-4210-B DTS
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+
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+This adds a device tree for the Raidsonic IB-4210-B NAS, a slightly
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+under-powered version of IB-4220-B with half the memory and
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+the cheaper version of the SoC.
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+
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+Signed-off-by: Linus Walleij <[email protected]>
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+---
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+ arch/arm/boot/dts/gemini/Makefile | 1 +
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+ arch/arm/boot/dts/gemini/gemini-nas4210b.dts | 205 +++++++++++++++++++
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+ 2 files changed, 206 insertions(+)
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+ create mode 100644 arch/arm/boot/dts/gemini/gemini-nas4210b.dts
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+
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+--- a/arch/arm/boot/dts/gemini/Makefile
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++++ b/arch/arm/boot/dts/gemini/Makefile
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+@@ -2,6 +2,7 @@
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+ dtb-$(CONFIG_ARCH_GEMINI) += \
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+ gemini-dlink-dir-685.dtb \
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+ gemini-dlink-dns-313.dtb \
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++ gemini-nas4210b.dtb \
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+ gemini-nas4220b.dtb \
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+ gemini-ns2502.dtb \
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+ gemini-rut1xx.dtb \
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+--- /dev/null
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++++ b/arch/arm/boot/dts/gemini/gemini-nas4210b.dts
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+@@ -0,0 +1,205 @@
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++// SPDX-License-Identifier: GPL-2.0
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++/*
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++ * Device Tree file for the Gemini-based Raidsonic NAS IB-4210-B
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++ * Based on the NAS Forum experiments by user "CptSpock".
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++ */
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++
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++/dts-v1/;
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++
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++#include "gemini.dtsi"
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++#include <dt-bindings/input/input.h>
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++
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++/ {
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++ model = "Raidsonic NAS IB-4210-B";
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++ compatible = "raidsonic,ib-4210-b", "cortina,gemini";
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++ #address-cells = <1>;
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++ #size-cells = <1>;
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++
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++ memory@0 { /* 64 MB */
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++ device_type = "memory";
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++ reg = <0x00000000 0x4000000>;
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++ };
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++
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++ chosen {
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++ bootargs = "console=ttyS0,19200n8 root=/dev/sda1 rw rootwait";
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++ stdout-path = &uart0;
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++ };
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++
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++ gpio_keys {
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++ compatible = "gpio-keys";
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++
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++ button-setup {
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++ debounce-interval = <100>;
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++ wakeup-source;
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++ linux,code = <KEY_SETUP>;
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++ label = "Backup button";
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++ /* Conflict with TVC */
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++ gpios = <&gpio1 29 GPIO_ACTIVE_LOW>;
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++ };
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++ button-restart {
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++ debounce-interval = <100>;
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++ wakeup-source;
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++ linux,code = <KEY_RESTART>;
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++ label = "Softreset button";
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++ /* Conflict with TVC */
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++ gpios = <&gpio1 31 GPIO_ACTIVE_LOW>;
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++ };
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++ };
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++
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++ leds {
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++ compatible = "gpio-leds";
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++ led-orange-hdd {
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++ label = "nas4220b:orange:hdd";
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++ /* Conflict with TVC */
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++ gpios = <&gpio1 28 GPIO_ACTIVE_HIGH>;
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++ default-state = "on";
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++ linux,default-trigger = "disk-activity";
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++ };
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++ led-green-os {
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++ label = "nas4220b:green:os";
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++ /* Conflict with TVC */
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++ gpios = <&gpio1 30 GPIO_ACTIVE_HIGH>;
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++ default-state = "on";
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++ linux,default-trigger = "heartbeat";
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++ };
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++ };
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++
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++ mdio0: mdio {
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++ compatible = "virtual,mdio-gpio";
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++ gpios = <&gpio0 22 GPIO_ACTIVE_HIGH>, /* MDC */
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++ <&gpio0 21 GPIO_ACTIVE_HIGH>; /* MDIO */
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++ #address-cells = <1>;
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++ #size-cells = <0>;
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++
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++ /* Realtek RTL8211B */
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++ phy0: ethernet-phy@1 {
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++ reg = <1>;
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++ device_type = "ethernet-phy";
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++ };
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++ };
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++
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++ soc {
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++ flash@30000000 {
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++ status = "okay";
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++ /* 16MB of flash */
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++ reg = <0x30000000 0x01000000>;
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++
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++ partitions {
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++ compatible = "redboot-fis";
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++ /* Eraseblock at 0xfe0000 */
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++ fis-index-block = <0x7f>;
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++ };
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++ };
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++
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++ syscon: syscon@40000000 {
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++ pinctrl {
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++ gpio0_default_pins: pinctrl-gpio0 {
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++ mux {
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++ function = "gpio0";
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++ groups =
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++ "gpio0egrp",
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++ /* Used by MDIO */
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++ "gpio0igrp";
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++ };
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++ };
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++ gpio1_default_pins: pinctrl-gpio1 {
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++ mux {
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++ function = "gpio1";
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++ /* Lines 28-31 used by LEDs and buttons */
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++ groups = "gpio1dgrp";
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++ };
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++ };
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++ pinctrl-gmii {
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++ mux {
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++ function = "gmii";
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++ groups = "gmii_gmac0_grp";
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++ };
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++ conf0 {
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++ pins = "R8 GMAC0 RXDV", "U11 GMAC1 RXDV";
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++ skew-delay = <0>;
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++ };
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++ conf1 {
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++ pins = "T8 GMAC0 RXC";
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++ skew-delay = <10>;
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++ };
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++ conf2 {
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++ pins = "T11 GMAC1 RXC";
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++ skew-delay = <15>;
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++ };
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++ conf3 {
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++ pins = "P8 GMAC0 TXEN", "V11 GMAC1 TXEN";
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++ skew-delay = <7>;
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++ };
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++ conf4 {
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++ pins = "V7 GMAC0 TXC", "P10 GMAC1 TXC";
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++ skew-delay = <10>;
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++ };
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++ conf5 {
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++ /* The data lines all have default skew */
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++ pins = "U8 GMAC0 RXD0", "V8 GMAC0 RXD1",
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++ "P9 GMAC0 RXD2", "R9 GMAC0 RXD3",
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++ "R11 GMAC1 RXD0", "P11 GMAC1 RXD1",
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++ "V12 GMAC1 RXD2", "U12 GMAC1 RXD3",
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++ "R10 GMAC1 TXD0", "T10 GMAC1 TXD1",
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++ "U10 GMAC1 TXD2", "V10 GMAC1 TXD3";
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++ skew-delay = <7>;
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++ };
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++ conf6 {
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++ pins = "U7 GMAC0 TXD0", "T7 GMAC0 TXD1",
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++ "R7 GMAC0 TXD2", "P7 GMAC0 TXD3";
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++ skew-delay = <5>;
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++ };
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++ /* Set up drive strength on GMAC0 to 16 mA */
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++ conf7 {
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++ groups = "gmii_gmac0_grp";
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++ drive-strength = <16>;
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++ };
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++ };
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++ };
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++ };
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++
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++ sata: sata@46000000 {
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++ cortina,gemini-ata-muxmode = <0>;
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++ cortina,gemini-enable-sata-bridge;
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++ status = "okay";
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++ };
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++
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++ gpio0: gpio@4d000000 {
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&gpio0_default_pins>;
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++ };
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++
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++ gpio1: gpio@4e000000 {
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&gpio1_default_pins>;
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++ };
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++
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++ ethernet@60000000 {
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++ status = "okay";
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++
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++ ethernet-port@0 {
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++ phy-mode = "rgmii";
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++ phy-handle = <&phy0>;
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++ };
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++ ethernet-port@1 {
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++ /* Not used in this platform */
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++ };
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++ };
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++
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++ ide@63000000 {
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++ status = "okay";
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++ };
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++
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++ ide@63400000 {
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++ status = "okay";
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++ };
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++
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++ usb@68000000 {
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++ status = "okay";
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++ };
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++
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++ usb@69000000 {
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++ status = "okay";
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++ };
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++ };
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++};
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Linus Walleij