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