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imx95-a55-evk: add MBR/GPT partition table parsing on eMMC

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Parse the partition table on /dev/mmcsd0 during board bringup and
register each partition as /dev/mmcsd0pN. MBR partitions have no
name field so a custom handler is needed instead of the default
register_partition which skips unnamed entries.

Verify by i.mx95 FRDM
'mount -t vfat /dev/mmcsd0p0 /data'

Signed-off-by: buxiasen <buxiasen@xiaomi.com>
This commit is contained in:
buxiasen
2026-03-06 15:51:49 +08:00
committed by Xiang Xiao
parent 9e048af2c3
commit 0f3590fd19
1 changed files with 29 additions and 0 deletions
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boards/arm64/imx9/imx95-a55-evk/src/imx9_bringup.c
+29
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@@ -27,14 +27,31 @@
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <syslog.h>
#include <nuttx/fs/fs.h>
#include <nuttx/fs/partition.h>
#include "imx9_dma_alloc.h"
#include "imx95-evk.h"
#if defined(CONFIG_GPT_PARTITION) || defined(CONFIG_MBR_PARTITION)
static void mmcsd_partition_handler(FAR struct partition_s *part,
FAR void *arg)
{
char devname[32];
snprintf(devname, sizeof(devname), "/dev/mmcsd0p%zu", part->index);
register_blockpartition(devname, 0660, "/dev/mmcsd0",
part->firstblock, part->nblocks);
syslog(LOG_INFO, "Registered partition %s (start=%lu nblocks=%lu)\n",
devname, (unsigned long)part->firstblock,
(unsigned long)part->nblocks);
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
@@ -78,6 +95,18 @@ int imx9_bringup(void)
{
syslog(LOG_ERR, "Failed to init MMCSD driver: %d\n", ret);
}
#if defined(CONFIG_GPT_PARTITION) || defined(CONFIG_MBR_PARTITION)
else
{
ret = parse_block_partition("/dev/mmcsd0",
mmcsd_partition_handler, NULL);
if (ret < 0)
{
syslog(LOG_ERR, "Failed to parse partition table: %d\n", ret);
}
}
#endif
#endif
UNUSED(ret);