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board: st: stm32mp2: add mmc_get_env_dev()

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Use the boot instance to select the correct mmc device identifier,
this patch only to save the environment on eMMC = MMC(1) on
STMicroelectronics boards.

Set the CONFIG_SYS_MMC_ENV_DEV to -1 to select the mmc boot instance
by default.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrice Chotard 2025-04-22 17:33:42 +02:00
parent 1b343e2603
commit a3be0ccc47
2 changed files with 38 additions and 1 deletions
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37
board/st/stm32mp2/stm32mp2.c
View File

@ -10,6 +10,7 @@
#include <fdt_support.h>
#include <log.h>
#include <misc.h>
#include <mmc.h>
#include <asm/global_data.h>
#include <asm/arch/sys_proto.h>
#include <dm/device.h>
@ -78,6 +79,42 @@ enum env_location env_get_location(enum env_operation op, int prio)
}
}
int mmc_get_boot(void)
{
struct udevice *dev;
u32 boot_mode = get_bootmode();
unsigned int instance = (boot_mode & TAMP_BOOT_INSTANCE_MASK) - 1;
char cmd[20];
const u32 sdmmc_addr[] = {
STM32_SDMMC1_BASE,
STM32_SDMMC2_BASE,
STM32_SDMMC3_BASE
};
if (instance > ARRAY_SIZE(sdmmc_addr))
return 0;
/* search associated sdmmc node in devicetree */
snprintf(cmd, sizeof(cmd), "mmc@%x", sdmmc_addr[instance]);
if (uclass_get_device_by_name(UCLASS_MMC, cmd, &dev)) {
log_err("mmc%d = %s not found in device tree!\n", instance, cmd);
return 0;
}
return dev_seq(dev);
};
int mmc_get_env_dev(void)
{
const int mmc_env_dev = CONFIG_IS_ENABLED(ENV_IS_IN_MMC, (CONFIG_SYS_MMC_ENV_DEV), (-1));
if (mmc_env_dev >= 0)
return mmc_env_dev;
/* use boot instance to select the correct mmc device identifier */
return mmc_get_boot();
}
int board_late_init(void)
{
const void *fdt_compat;

2
configs/stm32mp25_defconfig
View File

@ -36,7 +36,7 @@ CONFIG_CMD_LOG=y
CONFIG_OF_LIVE=y
CONFIG_ENV_IS_NOWHERE=y
CONFIG_ENV_IS_IN_MMC=y
CONFIG_SYS_MMC_ENV_DEV=1
CONFIG_SYS_MMC_ENV_DEV=-1
CONFIG_NO_NET=y
CONFIG_SYS_64BIT_LBA=y
CONFIG_GPIO_HOG=y