[PATCH 4/6] arm: mediatek: add MT8366 application processor

From: Chris Chen <[email protected]>

Add basic support for the MT8366 application processor including init
Kconfig target.

Signed-off-by: Chris Chen <[email protected]>
Co-developed-by: David Lechner <[email protected]>
Signed-off-by: David Lechner <[email protected]>
---
 arch/arm/mach-mediatek/Kconfig         | 12 ++++++-
 arch/arm/mach-mediatek/Makefile        |  1 +
 arch/arm/mach-mediatek/cpu.c           |  3 +-
 arch/arm/mach-mediatek/mt8366/Makefile |  3 ++
 arch/arm/mach-mediatek/mt8366/init.c   | 58 ++++++++++++++++++++++++++++++++++
 5 files changed, 75 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index 9ff7e7a7f5e..a9ef1f1e314 100644
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig
@@ -120,6 +120,15 @@ config TARGET_MT8365
 	  It is including UART, SPI, USB2.0 dual role, SD and MMC cards, NAND, PWM,
 	  I2C, I2S, S/PDIF, and several LPDDR3 and LPDDR4 options.
 
+config TARGET_MT8366
+	bool "MediaTek MT8366 SoC"
+	select ARM64
+	help
+	  The MediaTek MT8366 is a ARM64-based SoC with a single-core Cortex-A76 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
+	  options.
+
 config TARGET_MT8512
 	bool "MediaTek MT8512 SoC"
 	select ARM64
@@ -160,6 +169,7 @@ config MTK_MEM_MAP_DDR_BASE_PHY
 config MTK_MEM_MAP_DDR_SIZE
 	hex "DDR .size in mem_map"
 	default 0x200000000 if TARGET_MT7987 || TARGET_MT7988 || TARGET_MT8188 || TARGET_MT8195
+	default 0x100000000 if TARGET_MT8366
 	default 0xc0000000 if TARGET_MT8365
 	default 0x80000000 if TARGET_MT7981 || TARGET_MT7986 || TARGET_MT8183
 	default 0x40000000 if TARGET_MT7622 || TARGET_MT8512
@@ -208,7 +218,7 @@ 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_MT8189 || TARGET_MT8195
+	default "media=emmc" if TARGET_MT8516 || TARGET_MT8365 || TARGET_MT8366 || 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 35f748a70d6..51bf5789bb5 100644
--- a/arch/arm/mach-mediatek/Makefile
+++ b/arch/arm/mach-mediatek/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_TARGET_MT8188) += mt8188/
 obj-$(CONFIG_TARGET_MT8189) += mt8189/
 obj-$(CONFIG_TARGET_MT8195) += mt8195/
 obj-$(CONFIG_TARGET_MT8365) += mt8365/
+obj-$(CONFIG_TARGET_MT8366) += mt8366/
 obj-$(CONFIG_TARGET_MT8512) += mt8512/
 obj-$(CONFIG_TARGET_MT8516) += mt8516/
 obj-$(CONFIG_TARGET_MT8518) += mt8518/
diff --git a/arch/arm/mach-mediatek/cpu.c b/arch/arm/mach-mediatek/cpu.c
index 56a41e42df6..04ede8823b0 100644
--- a/arch/arm/mach-mediatek/cpu.c
+++ b/arch/arm/mach-mediatek/cpu.c
@@ -39,7 +39,8 @@ void enable_caches(void)
 u32 mediatek_sip_part_name(void)
 {
 	if (CONFIG_IS_ENABLED(TARGET_MT8188) || CONFIG_IS_ENABLED(TARGET_MT8189) ||
-	    CONFIG_IS_ENABLED(TARGET_MT8195) || CONFIG_IS_ENABLED(TARGET_MT8365)) {
+	    CONFIG_IS_ENABLED(TARGET_MT8195) || CONFIG_IS_ENABLED(TARGET_MT8365) ||
+	    CONFIG_IS_ENABLED(TARGET_MT8366)) {
 		struct arm_smccc_res res __maybe_unused;
 
 		arm_smccc_smc(MTK_SIP_PLAT_BINFO, 0, 0, 0, 0, 0, 0, 0, &res);
diff --git a/arch/arm/mach-mediatek/mt8366/Makefile b/arch/arm/mach-mediatek/mt8366/Makefile
new file mode 100644
index 00000000000..661744a4398
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8366/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-y += init.o
diff --git a/arch/arm/mach-mediatek/mt8366/init.c b/arch/arm/mach-mediatek/mt8366/init.c
new file mode 100644
index 00000000000..13123be068e
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8366/init.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2026 Baylibre, SAS
+ * Copyright (C) 2026 MediaTek Inc.
+ * Author: Chris Chen <[email protected]>
+ */
+
+#include <fdtdec.h>
+#include <stdio.h>
+#include <asm/global_data.h>
+#include <asm/system.h>
+#include <dm/uclass.h>
+#include <linux/kernel.h>
+#include <linux/sizes.h>
+#include <wdt.h>
+
+#include "../cpu.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
+{
+	/*
+	 * Limit gd->ram_top not exceeding SZ_4G. Because some peripherals like
+	 * MMC requires DMA buffer allocated below SZ_4G.
+	 */
+	return min(gd->ram_top, SZ_4G);
+}
+
+void reset_cpu(void)
+{
+	if (CONFIG_IS_ENABLED(PSCI_RESET)) {
+		psci_system_reset();
+	} else {
+		struct udevice *wdt;
+
+		uclass_first_device(UCLASS_WDT, &wdt);
+		if (wdt)
+			wdt_expire_now(wdt, 0);
+	}
+}
+
+int print_cpuinfo(void)
+{
+	u32 part = mediatek_sip_part_name();
+
+	if (part)
+		printf("CPU:   MediaTek MT%.4x\n", part);
+	else
+		printf("CPU:   MediaTek MT8366 series\n");
+
+	return 0;
+}

-- 
2.43.0