arm: mediatek: add support for MediaTek MT8195 SoC

This adds basic support for MediaTek MT8195 SoC.

Add watchdog support by adding upstream compatible string.

Signed-off-by: Julien Stephan <jstephan@baylibre.com>

diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-mediatek/Kconfig
index d1d2605b2ccbe4fc34fea9d67e7d6852afe0dc76..69d6208b03d83d4d6539ce50f5bc2a2c5caf297a 100644 (file)
--- 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_MT8195
+       bool "MediaTek MT8195 SoC"
+       select ARM64
+       help
+         The MediaTek MT8195 is a ARM64-based SoC with a quad-core Cortex-A73 and
+         a quad-core Cortex-A53. It is including UART, SPI, USB3.0 dual role,
+         SD and MMC cards, UFS, PWM, I2C, I2S, S/PDIF, and several LPDDR3
+         and LPDDR4 options.
+
 config TARGET_MT8365
        bool "MediaTek MT8365 SoC"
        select ARM64
@@ -165,7 +174,7 @@ 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
+       default "media=emmc" if TARGET_MT8516 || TARGET_MT8365 || TARGET_MT8183 || TARGET_MT8188 || 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 44591bed6fa0c57a026fa0b71f5e46911ca18a50..723862722b122f8ae78de808d3cd6247b9d27105 100644 (file)
--- a/arch/arm/mach-mediatek/Makefile
+++ b/arch/arm/mach-mediatek/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_TARGET_MT7987) += mt7987/
 obj-$(CONFIG_TARGET_MT7988) += mt7988/
 obj-$(CONFIG_TARGET_MT8183) += mt8183/
 obj-$(CONFIG_TARGET_MT8188) += mt8188/
+obj-$(CONFIG_TARGET_MT8195) += mt8195/
 obj-$(CONFIG_TARGET_MT8365) += mt8365/
 obj-$(CONFIG_TARGET_MT8512) += mt8512/
 obj-$(CONFIG_TARGET_MT8516) += mt8516/

diff --git a/arch/arm/mach-mediatek/mt8195/Makefile b/arch/arm/mach-mediatek/mt8195/Makefile
new file mode 100644 (file)
index 0000000..886ab7e
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8195/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:     GPL-2.0
+
+obj-y += init.o

diff --git a/arch/arm/mach-mediatek/mt8195/init.c b/arch/arm/mach-mediatek/mt8195/init.c
new file mode 100644 (file)
index 0000000..c399550
--- /dev/null
+++ b/arch/arm/mach-mediatek/mt8195/init.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2026 MediaTek Inc.
+ * Copyright (C) 2026 BayLibre, SAS
+ * Author: Julien Stephan <jstephan@baylibre.com>
+ *         Chris-QJ Chen <chris-qj.chen@mediatek.com>
+ */
+
+#include <asm/armv8/mmu.h>
+#include <asm/system.h>
+#include <dm/uclass.h>
+#include <linux/sizes.h>
+#include <wdt.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.  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;
+}
+
+int mtk_soc_early_init(void)
+{
+       return 0;
+}
+
+void reset_cpu(void)
+{
+       struct udevice *wdt;
+
+       if (IS_ENABLED(CONFIG_PSCI_RESET)) {
+               psci_system_reset();
+       } else {
+               uclass_first_device(UCLASS_WDT, &wdt);
+               if (wdt)
+                       wdt_expire_now(wdt, 0);
+       }
+}
+
+int print_cpuinfo(void)
+{
+       printf("CPU:   MediaTek MT8195\n");
+       return 0;
+}
+
+static struct mm_region mt8195_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 = mt8195_mem_map;

diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 4d4ab4cbe903e867f834427dbff4d9ce44efe784..3c7e043c08e926f65a229a57b7cf61f72b02ee2e 100644 (file)
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -146,6 +146,7 @@ static const struct udevice_id mtk_wdt_ids[] = {
        { .compatible = "mediatek,mt6589-wdt"},
        { .compatible = "mediatek,mt7986-wdt" },
        { .compatible = "mediatek,mt8188-wdt" },
+       { .compatible = "mediatek,mt8195-wdt" },
        {}
 };