From: Chris-QJ Chen <[email protected]>

Add a basic .dtsi file for MediaTek MT8189. This will suffice until an
upstream devicetree is available from Linux.

Signed-off-by: Chris-QJ Chen <[email protected]>
Signed-off-by: David Lechner <[email protected]>
---
 arch/arm/dts/mt8189.dtsi | 243 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 243 insertions(+)

diff --git a/arch/arm/dts/mt8189.dtsi b/arch/arm/dts/mt8189.dtsi
new file mode 100644
index 00000000000..cbece7b89c7
--- /dev/null
+++ b/arch/arm/dts/mt8189.dtsi
@@ -0,0 +1,243 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2026 MediaTek Inc.
+ * Author: Macpaul Lin <[email protected]>
+ */
+
+#include <dt-bindings/clock/mediatek,mt8189-clk.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+       compatible = "mediatek,mt8189";
+       interrupt-parent = <&gic>;
+       #address-cells = <2>;
+       #size-cells = <2>;
+
+       aliases {
+               serial0 = &uart0;
+       };
+
+       clk26m: oscillator {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <26000000>;
+               clock-output-names = "clk26m";
+       };
+
+       cpus {
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               cpu0: cpu@0 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a55";
+                       reg = <0x000>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <282>;
+               };
+
+               cpu1: cpu@100 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a55";
+                       reg = <0x100>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <282>;
+               };
+
+               cpu2: cpu@200 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a55";
+                       reg = <0x200>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <282>;
+               };
+
+               cpu3: cpu@300 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a55";
+                       reg = <0x300>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <282>;
+               };
+
+               cpu4: cpu@400 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a55";
+                       reg = <0x400>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <282>;
+               };
+
+               cpu5: cpu@500 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a55";
+                       reg = <0x500>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <282>;
+               };
+
+               cpu6: cpu@600 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a78";
+                       reg = <0x600>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <1024>;
+               };
+
+               cpu7: cpu@700 {
+                       device_type = "cpu";
+                       compatible = "arm,cortex-a78";
+                       reg = <0x700>;
+                       enable-method = "psci";
+                       capacity-dmips-mhz = <1024>;
+               };
+
+               cpu-map {
+                       cluster0 {
+                               core0 {
+                                       cpu = <&cpu0>;
+                               };
+
+                               core1 {
+                                       cpu = <&cpu1>;
+                               };
+
+                               core2 {
+                                       cpu = <&cpu2>;
+                               };
+
+                               core3 {
+                                       cpu = <&cpu3>;
+                               };
+
+                               core4 {
+                                       cpu = <&cpu4>;
+                               };
+
+                               core5 {
+                                       cpu = <&cpu5>;
+                               };
+
+                               core6 {
+                                       cpu = <&cpu6>;
+                               };
+
+                               core7 {
+                                       cpu = <&cpu7>;
+                               };
+                       };
+               };
+       };
+
+       memory: memory@40000000 {
+               device_type = "memory";
+               /* This memory size is filled in by the bootloader */
+               reg = <0 0x40000000 0 0>;
+       };
+
+       soc {
+               #address-cells = <2>;
+               #size-cells = <2>;
+               compatible = "simple-bus";
+               ranges;
+
+               watchdog: watchdog@1c00a000 {
+                       compatible = "mediatek,mt8391-wdt",
+                                    "mediatek,wdt";
+                       reg = <0 0x1c00a000 0 0x100>;
+                       status = "disabled";
+               };
+
+               gic: interrupt-controller@c000000 {
+                       compatible = "arm,gic-v3";
+                       reg = <0 0xc000000 0 0x40000>, /* distributor */
+                             <0 0xc040000 0 0x200000>; /* redistributor */
+                       interrupt-parent = <&gic>;
+                       interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH 0>;
+                       interrupt-controller;
+                       #interrupt-cells = <4>;
+                       #redistributor-regions = <1>;
+
+                       ppi-partitions {
+                               ppi_cluster0: interrupt-partition-0 {
+                                       affinity = <&cpu0 &cpu1 &cpu2 &cpu3 
&cpu4 &cpu5>;
+                               };
+
+                               ppi_cluster1: interrupt-partition-1 {
+                                       affinity = <&cpu6 &cpu7>;
+                               };
+                       };
+               };
+
+               uart0: serial@11001000 {
+                       compatible = "mediatek,mt8189-uart", 
"mediatek,mt6577-uart";
+                       reg = <0 0x11001000 0 0x1000>;
+                       interrupts = <GIC_SPI 397 IRQ_TYPE_LEVEL_HIGH 0>;
+                       clocks = <&clk26m>, <&pericfg_ao_clk CLK_PERAO_UART0>;
+                       clock-names = "baud", "bus";
+                       status = "disabled";
+               };
+
+               mmc0: mmc@11230000 {
+                       compatible = "mediatek,mt8189-mmc";
+                       reg = <0 0x11230000 0 0x10000>,
+                             <0 0x11e70000 0 0x1000>;
+                       clocks = <&topckgen_clk CLK_TOP_MSDC50_0_SEL>,
+                                <&pericfg_ao_clk CLK_PERAO_MSDC0_H>,
+                                <&pericfg_ao_clk CLK_PERAO_MSDC0>;
+                       clock-names = "source", "hclk", "source_cg";
+                       interrupts = <GIC_SPI 387 IRQ_TYPE_LEVEL_HIGH 0>;
+                       status = "disabled";
+               };
+
+               clock-controller@1000c000 {
+                       compatible = "mediatek,mt8189-apmixedsys", "syscon";
+                       reg = <0 0x1000c000 0 0x1000>;
+                       #clock-cells = <1>;
+               };
+
+               clock-controller@14000000 {
+                       compatible = "mediatek,mt8189-dispsys", "syscon";
+                       reg = <0 0x14000000 0 0x1000>;
+                       #clock-cells = <1>;
+               };
+
+               clock-controller@1e980000 {
+                       compatible = "mediatek,mt8189-gce-d", "syscon";
+                       reg = <0 0x1e980000 0 0x1000>;
+                       #clock-cells = <1>;
+               };
+
+               clock-controller@1e990000 {
+                       compatible = "mediatek,mt8189-gce-m", "syscon";
+                       reg = <0 0x1e990000 0 0x1000>;
+                       #clock-cells = <1>;
+               };
+
+               clock-controller@1e800000 {
+                       compatible = "mediatek,mt8189-mm-infra", "syscon";
+                       reg = <0 0x1e800000 0 0x1000>;
+                       #clock-cells = <1>;
+               };
+
+               pericfg_ao_clk: clock-controller@11036000 {
+                       compatible = "mediatek,mt8189-peri-ao", "syscon";
+                       reg = <0 0x11036000 0 0x1000>;
+                       #clock-cells = <1>;
+                       #reset-cells = <1>;
+               };
+
+               topckgen_clk: clock-controller@10000000 {
+                       compatible = "mediatek,mt8189-topckgen", "syscon";
+                       reg = <0 0x10000000 0 0x1000>;
+                       #clock-cells = <1>;
+               };
+
+               clock-controller@1c00c000 {
+                       compatible = "mediatek,mt8189-vlpcfg-ao", "syscon";
+                       reg = <0 0x1c00c000 0 0x1000>;
+                       #clock-cells = <1>;
+               };
+       };
+};

-- 
2.43.0

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