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/*
* (C) Copyright 2013
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <bootcount.h>
#include <linux/compiler.h>
#include <i2c.h>
#define BC_MAGIC 0xbc
void bootcount_store(ulong a)
{
unsigned char buf[3];
int ret;
buf[0] = BC_MAGIC;
buf[1] = (a & 0xff);
ret = i2c_write(CONFIG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
CONFIG_BOOTCOUNT_ALEN, buf, 2);
if (ret != 0)
puts("Error writing bootcount\n");
}
ulong bootcount_load(void)
{
unsigned char buf[3];
int ret;
ret = i2c_read(CONFIG_SYS_I2C_RTC_ADDR, CONFIG_SYS_BOOTCOUNT_ADDR,
CONFIG_BOOTCOUNT_ALEN, buf, 2);
if (ret != 0) {
puts("Error loading bootcount\n");
return 0;
}
if (buf[0] == BC_MAGIC)
return buf[1];
bootcount_store(0);
return 0;
}
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