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

Le mar. 4 août 2026 à 01:21, David Lechner <[email protected]> a écrit :
>
> 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,

According to https://genio.mediatek.com/doc/android/hw/mt8366-soc.html
it's 5 Cortex-A55

> +         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
>