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hwinfo_sam0.c
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hwinfo_sam0.c
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/*
* Copyright (c) 2019 ML!PA Consulting GmbH
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT atmel_sam0_id
#include <soc.h>
#include <zephyr/drivers/hwinfo.h>
#include <string.h>
#include <zephyr/sys/byteorder.h>
struct sam0_uid {
uint32_t id[4];
};
ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)
{
struct sam0_uid dev_id;
dev_id.id[0] = sys_cpu_to_be32(*(const uint32_t *)
DT_INST_REG_ADDR_BY_IDX(0, 0));
dev_id.id[1] = sys_cpu_to_be32(*(const uint32_t *)
DT_INST_REG_ADDR_BY_IDX(0, 1));
dev_id.id[2] = sys_cpu_to_be32(*(const uint32_t *)
DT_INST_REG_ADDR_BY_IDX(0, 2));
dev_id.id[3] = sys_cpu_to_be32(*(const uint32_t *)
DT_INST_REG_ADDR_BY_IDX(0, 3));
if (length > sizeof(dev_id.id)) {
length = sizeof(dev_id.id);
}
memcpy(buffer, dev_id.id, length);
return length;
}