1 /*
2  * Copyright (c) 2024 Nuvoton Technology Corporation.
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  */
6 
7 #include <soc.h>
8 #include <zephyr/drivers/hwinfo.h>
9 #include <zephyr/sys/byteorder.h>
10 #include <string.h>
11 
12 struct numaker_uid {
13 	uint32_t id[3];
14 };
15 
z_impl_hwinfo_get_device_id(uint8_t * buffer,size_t length)16 ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)
17 {
18 	struct numaker_uid dev_id;
19 
20 	SYS_UnlockReg();
21 	RMC_Open();
22 
23 	dev_id.id[0] = sys_cpu_to_be32(RMC_ReadUID(0));
24 	dev_id.id[1] = sys_cpu_to_be32(RMC_ReadUID(1));
25 	dev_id.id[2] = sys_cpu_to_be32(RMC_ReadUID(2));
26 
27 	length = MIN(length, sizeof(dev_id.id));
28 	memcpy(buffer, dev_id.id, length);
29 
30 	RMC_Close();
31 	SYS_LockReg();
32 
33 	return length;
34 }
35