[PATCH 1/4] arm: mediatek: add support of MT8189 SoC family

[David Lechner]

From: Chris-QJ Chen <chris-qj.chen at mediatek.com>

Add TARGET_MT8189 for MT8189 and similar SoCs.

Signed-off-by: Chris-QJ Chen <chris-qj.chen at mediatek.com>
Signed-off-by: Macpaul Lin <macpaul.lin at mediatek.com>
Signed-off-by: David Lechner <dlechner at baylibre.com>
---
 arch/arm/mach-mediatek/Kconfig         | 11 ++++++-
 arch/arm/mach-mediatek/Makefile        |  1 +
 arch/arm/mach-mediatek/mt8189/Makefile |  3 ++
 arch/arm/mach-mediatek/mt8189/init.c   | 58 ++++++++++++++++++++++++++++++++++
 4 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index 8da4ba5ceab..bdbc4233054 100644
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig
@@ -93,6 +93,15 @@ config TARGET_MT8188
           USB3.0 dual role, SD and MMC cards, UFS, PWM, I2C, I2S, S/PDIF, and
           several LPDDR3 and LPDDR4 options.
 
+config TARGET_MT8189
+	bool "MediaTek MT8189 SoC"
+	select ARM64
+	help
+	  The MediaTek MT8189 is a ARM64-based SoC with a dual-core Cortex-A78 and
+	  a six-core Cortex-A55. It is including UART, SPI, USB3.0 dual role,
+	  SD and MMC cards, UFS, PWM, I2C, I2S, S/PDIF, and several LPDDR4x
+	  and LPDDR5x options.
+
 config TARGET_MT8195
 	bool "MediaTek MT8195 SoC"
 	select ARM64
@@ -201,7 +210,7 @@ config SYS_CONFIG_NAME
 config MTK_BROM_HEADER_INFO
 	string
 	default "media=nor" if TARGET_MT8518 || TARGET_MT8512 || TARGET_MT7629
-	default "media=emmc" if TARGET_MT8516 || TARGET_MT8365 || TARGET_MT8183 || TARGET_MT8188 || TARGET_MT8195
+	default "media=emmc" if TARGET_MT8516 || TARGET_MT8365 || TARGET_MT8183 || TARGET_MT8188 || TARGET_MT8189 || TARGET_MT8195
 	default "lk=1" if TARGET_MT7623
 
 config MTK_TZ_MOVABLE
diff --git a/arch/arm/mach-mediatek/Makefile b/arch/arm/mach-mediatek/Makefile
index d1f64d61ab9..35f748a70d6 100644
--- a/arch/arm/mach-mediatek/Makefile
+++ b/arch/arm/mach-mediatek/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_TARGET_MT7987) += mt7987/
 obj-$(CONFIG_TARGET_MT7988) += mt7988/
 obj-$(CONFIG_TARGET_MT8183) += mt8183/
 obj-$(CONFIG_TARGET_MT8188) += mt8188/
+obj-$(CONFIG_TARGET_MT8189) += mt8189/
 obj-$(CONFIG_TARGET_MT8195) += mt8195/
 obj-$(CONFIG_TARGET_MT8365) += mt8365/
 obj-$(CONFIG_TARGET_MT8512) += mt8512/
diff --git a/arch/arm/mach-mediatek/mt8189/Makefile b/arch/arm/mach-mediatek/mt8189/Makefile
new file mode 100644
index 00000000000..886ab7e4eb9
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8189/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += init.o
diff --git a/arch/arm/mach-mediatek/mt8189/init.c b/arch/arm/mach-mediatek/mt8189/init.c
new file mode 100644
index 00000000000..56e852e2374
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8189/init.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2026 MediaTek Inc.
+ * Author: Chris-QJ Chen <chris-qj.chen at mediatek.com>
+ */
+
+#include <fdtdec.h>
+#include <stdio.h>
+#include <asm/global_data.h>
+#include <asm/system.h>
+#include <linux/sizes.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	int ret;
+
+	ret = fdtdec_setup_memory_banksize();
+	if (ret)
+		return ret;
+
+	fdtdec_setup_mem_size_base();
+
+	/*
+	 * Limit gd->ram_top not exceeding SZ_4G.
+	 * Because some periphals like mmc requires DMA buffer
+	 * allocated below SZ_4G.
+	 *
+	 * Note: SZ_1M is for adjusting gd->relocaddr,
+	 *       the reserved memory for u-boot itself.
+	 */
+	if (gd->ram_base + gd->ram_size >= SZ_4G)
+		gd->mon_len = (gd->ram_base + gd->ram_size + SZ_1M) - SZ_4G;
+
+	return 0;
+}
+
+int dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = gd->ram_base;
+	gd->bd->bi_dram[0].size = gd->ram_size;
+
+	return 0;
+}
+
+void reset_cpu(ulong addr)
+{
+	if (!CONFIG_IS_ENABLED(SYSRESET))
+		psci_system_reset();
+}
+
+int print_cpuinfo(void)
+{
+	printf("CPU:   MediaTek MT8391\n");
+
+	return 0;
+}

-- 
2.43.0