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[qcom-next] Improve serial number detection using SMEM interface #52

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[qcom-next] Improve serial number detection using SMEM interface #52

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31 changes: 31 additions & 0 deletions arch/arm/mach-snapdragon/board.c
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,8 @@
#include <usb.h>
#include <sort.h>
#include <time.h>
#include <smem.h>
#include <soc/qcom/socinfo.h>
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@b49020 b49020 May 4, 2026

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This dependency header is not part of the qcom-next.

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@balajiselvanathan balajiselvanathan May 4, 2026

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Yes, it is part of FIT DTB PR.


#include "qcom-priv.h"

Expand Down Expand Up @@ -363,10 +365,39 @@ static const char *get_cmdline(void)
return cmdline;
}

/**
* board_serial_num() - Retrieves the board serial number from SMEM
* @serial_num_ptr: Pointer to store the serial number
*
* Return: 0 on success, negative error code on failure.
*/
static int board_serial_num(u32 *serial_num_ptr)
{
struct socinfo *soc_info_ptr;
struct udevice *dev_ptr;
size_t total_size;

if (uclass_get_device(UCLASS_SMEM, 0, &dev_ptr) != 0)
return -ENODEV;

soc_info_ptr = smem_get(dev_ptr, 0, SMEM_HW_SW_BUILD_ID, &total_size);
if (!soc_info_ptr)
return -ENODATA;

*serial_num_ptr = soc_info_ptr->serial_num;
return 0;
}

void qcom_set_serialno(void)
{
const char *cmdline = get_cmdline();
char serial[32];
u32 serial_num;

if (board_serial_num(&serial_num) == 0) {
env_set_hex("serial#", serial_num);
return;
}

if (!cmdline) {
log_debug("Failed to get bootargs\n");
Expand Down