1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright 2022 Google LLC
4 */
5#include <net.h>
6#include <dm/device.h>
7#include <dm/uclass.h>
8#include <atsha204a-i2c.h>
9#include "mercury_aa1.h"
10
11#define MERCURY_AA1_ATSHA204A_OTP_MAC0 4
12#define MERCURY_AA1_ATSHA204A_OTP_MAC1 5
13
14int mercury_aa1_read_mac(u8 *mac)
15{
16	struct udevice *dev;
17	u8 buf[8];
18	int ret;
19
20	ret = uclass_get_device_by_name(UCLASS_MISC, "atsha204a@64", &dev);
21	if (ret)
22		return ret;
23
24	ret = atsha204a_wakeup(dev);
25	if (ret)
26		return ret;
27
28	ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false,
29			     MERCURY_AA1_ATSHA204A_OTP_MAC0, buf);
30	if (ret)
31		goto sleep;
32
33	ret = atsha204a_read(dev, ATSHA204A_ZONE_OTP, false,
34			     MERCURY_AA1_ATSHA204A_OTP_MAC1, buf + 4);
35	if (ret)
36		goto sleep;
37
38	memcpy(mac, buf, ARP_HLEN);
39
40sleep:
41	atsha204a_sleep(dev);
42	return ret;
43}
44