board: mediatek: add MT8390 EVK board support

This adds support for the MT8390 EVK board with the following
features enabled/tested: Boot, UART, Watchdog and MMC.

MT8390 is based on MT8188.

Signed-off-by: Julien Masson <[email protected]>
Signed-off-by: Julien Stephan <[email protected]>
Reviewed-by: Mattijs Korpershoek <[email protected]>

3 files changed, 43 insertions, 0 deletions

diff --git a/board/mediatek/mt8390_evk/MAINTAINERS b/board/mediatek/mt8390_evk/MAINTAINERS
new file mode 100644
index 00000000000..d46b8b2e156
--- /dev/null
+++ b/board/mediatek/mt8390_evk/MAINTAINERS
@@ -0,0 +1,6 @@
+MT8390 EVK
+M:	Julien Masson <[email protected]>
+M:	Macpaul Lin <[email protected]>
+S:	Maintained
+F:	board/mediatek/mt8390_evk/
+F:	configs/mt8390_evk_defconfig
diff --git a/board/mediatek/mt8390_evk/Makefile b/board/mediatek/mt8390_evk/Makefile
new file mode 100644
index 00000000000..a26d46838c4
--- /dev/null
+++ b/board/mediatek/mt8390_evk/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += mt8390_evk.o
diff --git a/board/mediatek/mt8390_evk/mt8390_evk.c b/board/mediatek/mt8390_evk/mt8390_evk.c
new file mode 100644
index 00000000000..1ca40366a55
--- /dev/null
+++ b/board/mediatek/mt8390_evk/mt8390_evk.c
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2026 BayLibre SAS
+ * Author: Julien Masson <[email protected]>
+ */
+
+#include <linux/types.h>
+#include <asm/armv8/mmu.h>
+
+int board_init(void)
+{
+	return 0;
+}
+
+static struct mm_region mt8390_evk_mem_map[] = {
+	{
+		/* DDR */
+		.virt = 0x40000000UL,
+		.phys = 0x40000000UL,
+		.size = 0x200000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_OUTER_SHARE,
+	}, {
+		.virt = 0x00000000UL,
+		.phys = 0x00000000UL,
+		.size = 0x20000000UL,
+		.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+			 PTE_BLOCK_NON_SHARE |
+			 PTE_BLOCK_PXN | PTE_BLOCK_UXN
+	}, {
+		0,
+	}
+};
+
+struct mm_region *mem_map = mt8390_evk_mem_map;