// SPDX-License-Identifier: GPL-2.0+ | |
/* | |
* (C) Copyright 2013 | |
* Heiko Schocher, DENX Software Engineering, hs@denx.de. | |
*/ | |
#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; | |
} |