1 /*
2  * Copyright (c) 2019 Alexander Wachter
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  */
6 
7 #include <soc.h>
8 #include <drivers/hwinfo.h>
9 #include <string.h>
10 #include <sys/byteorder.h>
11 
12 struct imxrt_uid {
13 	uint32_t id[2];
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 imxrt_uid dev_id;
19 
20 #ifdef CONFIG_SOC_SERIES_IMX_RT11XX
21 	dev_id.id[0] = sys_cpu_to_be32(OCOTP->FUSEN[17].FUSE);
22 	dev_id.id[1] = sys_cpu_to_be32(OCOTP->FUSEN[16].FUSE);
23 #else
24 	dev_id.id[0] = sys_cpu_to_be32(OCOTP->CFG2);
25 	dev_id.id[1] = sys_cpu_to_be32(OCOTP->CFG1);
26 #endif
27 
28 	if (length > sizeof(dev_id.id)) {
29 		length = sizeof(dev_id.id);
30 	}
31 
32 	memcpy(buffer, dev_id.id, length);
33 
34 	return length;
35 }
36