[PATCH 9/9] board: stm32: add stm32h747-discovery board support
Lukasz Majewski
lukma at denx.de
Mon Jun 9 10:07:27 CEST 2025
Hi Patrice,
> On 6/7/25 11:37, Dario Binacchi wrote:
> > The board includes an STM32H747XI SoC with the following resources:
> > - 2 Mbytes Flash
> > - 1 Mbyte SRAM
> > - LCD-TFT controller
> > - MIPI-DSI interface
> > - FD-CAN
> > - USB 2.0 high-speed/full-speed
> > - Ethernet MAC
> > - camera interface
> >
> > Detailed information can be found at:
> > https://www.st.com/en/evaluation-tools/stm32h747i-disco.html
> >
> > Signed-off-by: Dario Binacchi <dario.binacchi at amarulasolutions.com>
> >
> > ---
> >
> > arch/arm/mach-stm32/stm32h7/Kconfig | 4 +++
> > board/st/stm32h747-disco/Kconfig | 15 ++++++++
> > board/st/stm32h747-disco/MAINTAINERS | 7 ++++
> > board/st/stm32h747-disco/Makefile | 6 ++++
> > board/st/stm32h747-disco/stm32h747-disco.c | 42
> > ++++++++++++++++++++++ configs/stm32h747-disco_defconfig |
> > 35 ++++++++++++++++++ drivers/clk/stm32/clk-stm32h7.c |
> > 5 +++ include/configs/stm32h747-disco.h | 32
> > +++++++++++++++++ 8 files changed, 146 insertions(+)
> > create mode 100644 board/st/stm32h747-disco/Kconfig
> > create mode 100644 board/st/stm32h747-disco/MAINTAINERS
> > create mode 100644 board/st/stm32h747-disco/Makefile
> > create mode 100644 board/st/stm32h747-disco/stm32h747-disco.c
> > create mode 100644 configs/stm32h747-disco_defconfig
> > create mode 100644 include/configs/stm32h747-disco.h
> >
> > diff --git a/arch/arm/mach-stm32/stm32h7/Kconfig
> > b/arch/arm/mach-stm32/stm32h7/Kconfig index
> > 70233a4b23cd..72f20c477d04 100644 ---
> > a/arch/arm/mach-stm32/stm32h7/Kconfig +++
> > b/arch/arm/mach-stm32/stm32h7/Kconfig @@ -6,11 +6,15 @@ config
> > TARGET_STM32H743_DISCO config TARGET_STM32H743_EVAL
> > bool "STM32H743 Evaluation board"
> >
> > +config TARGET_STM32H747_DISCO
> > + bool "STM32H747 Discovery board"
> > +
> > config TARGET_STM32H750_ART_PI
> > bool "STM32H750 ART Pi board"
> >
> > source "board/st/stm32h743-eval/Kconfig"
> > source "board/st/stm32h743-disco/Kconfig"
> > +source "board/st/stm32h747-disco/Kconfig"
> > source "board/st/stm32h750-art-pi/Kconfig"
> >
> > endif
> > diff --git a/board/st/stm32h747-disco/Kconfig
> > b/board/st/stm32h747-disco/Kconfig new file mode 100644
> > index 000000000000..a7b2c09a327f
> > --- /dev/null
> > +++ b/board/st/stm32h747-disco/Kconfig
> > @@ -0,0 +1,15 @@
> > +if TARGET_STM32H747_DISCO
> > +
> > +config SYS_BOARD
> > + default "stm32h747-disco"
> > +
> > +config SYS_VENDOR
> > + default "st"
> > +
> > +config SYS_SOC
> > + default "stm32h7"
> > +
> > +config SYS_CONFIG_NAME
> > + default "stm32h747-disco"
> > +
> > +endif
> > diff --git a/board/st/stm32h747-disco/MAINTAINERS
> > b/board/st/stm32h747-disco/MAINTAINERS new file mode 100644
> > index 000000000000..d48649f773f3
> > --- /dev/null
> > +++ b/board/st/stm32h747-disco/MAINTAINERS
> > @@ -0,0 +1,7 @@
> > +STM32H747 DISCOVERY BOARD
> > +M: Dario Binacchi <dario.binacchi at amarulasolutions.com>
> > +S: Maintained
> > +F: board/st/stm32h747-disco
> > +F: include/configs/stm32h747-disco.h
> > +F: configs/stm32h747-disco_defconfig
> > +F: arch/arm/dts/stm32h747*
> > diff --git a/board/st/stm32h747-disco/Makefile
> > b/board/st/stm32h747-disco/Makefile new file mode 100644
> > index 000000000000..e11f052cc88f
> > --- /dev/null
> > +++ b/board/st/stm32h747-disco/Makefile
> > @@ -0,0 +1,6 @@
> > +# SPDX-License-Identifier: GPL-2.0+
> > +#
> > +# Copyright (c) 2025 Dario Binacchi
> > <dario.binacchi at amarulasolutions.com> +#
> > +
> > +obj-y := stm32h747-disco.o
> > diff --git a/board/st/stm32h747-disco/stm32h747-disco.c
> > b/board/st/stm32h747-disco/stm32h747-disco.c new file mode 100644
> > index 000000000000..be0884bdeb4d
> > --- /dev/null
> > +++ b/board/st/stm32h747-disco/stm32h747-disco.c
> > @@ -0,0 +1,42 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * stm32h747i-disco support
> > + *
> > + * Copyright (C) 2025 Dario Binacchi
> > <dario.binacchi at amarulasolutions.com>
> > + */
> > +
> > +#include <dm.h>
> > +#include <init.h>
> > +#include <log.h>
> > +#include <asm/global_data.h>
> > +
> > +DECLARE_GLOBAL_DATA_PTR;
> > +
> > +int dram_init(void)
> > +{
> > + struct udevice *dev;
> > + int ret;
> > +
> > + ret = uclass_get_device(UCLASS_RAM, 0, &dev);
> > + if (ret) {
> > + debug("DRAM init failed: %d\n", ret);
> > + return ret;
> > + }
> > +
> > + if (fdtdec_setup_mem_size_base() != 0)
> > + ret = -EINVAL;
> > +
> > + return ret;
> > +}
> > +
> > +int dram_init_banksize(void)
> > +{
> > + fdtdec_setup_memory_banksize();
> > +
> > + return 0;
> > +}
> > +
> > +int board_init(void)
> > +{
> > + return 0;
> > +}
> > diff --git a/configs/stm32h747-disco_defconfig
> > b/configs/stm32h747-disco_defconfig new file mode 100644
> > index 000000000000..8a0c72450d1e
> > --- /dev/null
> > +++ b/configs/stm32h747-disco_defconfig
> > @@ -0,0 +1,35 @@
> > +CONFIG_ARM=y
> > +CONFIG_ARCH_STM32=y
> > +CONFIG_TEXT_BASE=0x08000000
> > +CONFIG_SYS_MALLOC_LEN=0x100000
> > +CONFIG_NR_DRAM_BANKS=1
> > +CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
> > +CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x24040000
> > +CONFIG_ENV_SIZE=0x2000
> > +CONFIG_DEFAULT_DEVICE_TREE="st/stm32h747i-disco"
> > +CONFIG_OF_LIBFDT_OVERLAY=y
> > +CONFIG_SYS_LOAD_ADDR=0xd0400000
> > +CONFIG_STM32H7=y
> > +CONFIG_TARGET_STM32H747_DISCO=y
> > +CONFIG_DISTRO_DEFAULTS=y
I'm just wondering if there is any plan to move forward to use the new
approach?
As fair as I remember this is the "deprecated" option...
> > +CONFIG_BOOTDELAY=3
> > +CONFIG_AUTOBOOT_KEYED=y
> > +CONFIG_AUTOBOOT_PROMPT="Hit SPACE in %d seconds to stop
> > autoboot.\n" +CONFIG_AUTOBOOT_STOP_STR=" "
> > +CONFIG_DEFAULT_FDT_FILE="stm32h747i-disco"
> > +CONFIG_SYS_CBSIZE=256
> > +CONFIG_SYS_PBSIZE=282
> > +# CONFIG_DISPLAY_CPUINFO is not set
> > +CONFIG_SYS_PROMPT="U-Boot > "
> > +CONFIG_CMD_GPT=y
> > +CONFIG_CMD_MMC=y
> > +# CONFIG_CMD_SETEXPR is not set
> > +CONFIG_CMD_CACHE=y
> > +CONFIG_CMD_TIMER=y
> > +CONFIG_CMD_EXT4_WRITE=y
> > +# CONFIG_ISO_PARTITION is not set
> > +CONFIG_OF_CONTROL=y
> > +CONFIG_SYS_RELOC_GD_ENV_ADDR=y
> > +CONFIG_NO_NET=y
> > +CONFIG_STM32_SDMMC2=y
> > +# CONFIG_PINCTRL_FULL is not set
> > diff --git a/drivers/clk/stm32/clk-stm32h7.c
> > b/drivers/clk/stm32/clk-stm32h7.c index 6acf2ff0a8fb..aa3be414a29f
> > 100644 --- a/drivers/clk/stm32/clk-stm32h7.c
> > +++ b/drivers/clk/stm32/clk-stm32h7.c
> > @@ -114,6 +114,7 @@
> > #define QSPISRC_PER_CK 3
> >
> > #define PWR_CR3 0x0c
> > +#define PWR_CR3_LDOEN BIT(1)
> > #define PWR_CR3_SCUEN BIT(2)
> > #define PWR_D3CR 0x18
> > #define PWR_D3CR_VOS_MASK GENMASK(15, 14)
> > @@ -375,7 +376,11 @@ int configure_clocks(struct udevice *dev)
> > clrsetbits_le32(pwr_base + PWR_D3CR, PWR_D3CR_VOS_MASK,
> > VOS_SCALE_1 << PWR_D3CR_VOS_SHIFT);
> > /* Lock supply configuration update */
> > +#if IS_ENABLED(CONFIG_TARGET_STM32H747_DISCO)
> > + clrbits_le32(pwr_base + PWR_CR3, PWR_CR3_LDOEN);
> > +#else
> > clrbits_le32(pwr_base + PWR_CR3, PWR_CR3_SCUEN);
> > +#endif
> > while (!(readl(pwr_base + PWR_D3CR) & PWR_D3CR_VOSREADY))
> > ;
> >
> > diff --git a/include/configs/stm32h747-disco.h
> > b/include/configs/stm32h747-disco.h new file mode 100644
> > index 000000000000..393445a8ae1f
> > --- /dev/null
> > +++ b/include/configs/stm32h747-disco.h
> > @@ -0,0 +1,32 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */
> > +/*
> > + * Copyright (C) 2025 Dario Binacchi
> > <dario.binacchi at amarulasolutions.com>
> > + */
> > +
> > +#ifndef __CONFIG_H
> > +#define __CONFIG_H
> > +
> > +#include <config.h>
> > +#include <linux/sizes.h>
> > +
> > +/* For booting Linux, use the first 16MB of memory */
> > +#define CFG_SYS_BOOTMAPSZ SZ_16M
> > +
> > +#define CFG_SYS_FLASH_BASE 0x08000000
> > +
> > +#define CFG_SYS_HZ_CLOCK 1000000
> > +
> > +#define BOOT_TARGET_DEVICES(func) \
> > + func(MMC, mmc, 0)
> > +
> > +#include <config_distro_bootcmd.h>
> > +#define CFG_EXTRA_ENV_SETTINGS \
> > + "kernel_addr_r=0xD0008000\0"
> > \
> > + "fdtfile=stm32h747i-disco.dtb\0" \
> > + "fdt_addr_r=0xD0408000\0" \
> > + "scriptaddr=0xD0418000\0" \
> > + "pxefile_addr_r=0xD0428000\0" \
> > + "ramdisk_addr_r=0xD0438000\0"
> > \
> > + BOOTENV
> > +
> > +#endif /* __CONFIG_H */
> Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>
>
> Thanks
> Patrice
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Erika Unter
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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