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/*
* Copyright (C) 2018 Intel Corporation
* Copyright (c) 2020 Toradex
*/
#include <linux/hrtimer.h>
/*
* Before the commit 8b618628b2b the ktime_divns was non-exported function.
* Add the simple implementation of ktime_divns() to use in
* ktime_get_boottime_seconds().
*/
#if LINUX_VERSION_IS_LESS(3,19,0)
#include <linux/ktime.h>
#if BITS_PER_LONG < 64
/*
* Divide a ktime value by a nanosecond value
*/
u64 ktime_divns(const ktime_t kt, s64 div)
{
int sft = 0;
s64 dclc;
u64 tmp;
dclc = ktime_to_ns(kt);
tmp = dclc < 0 ? -dclc : dclc;
/* Make sure the divisor is less than 2^32: */
while (div >> 32) {
sft++;
div >>= 1;
}
tmp >>= sft;
do_div(tmp, (unsigned long) div);
return dclc < 0 ? -tmp : tmp;
}
#endif /* BITS_PER_LONG >= 64 */
#endif /* < 3.19 */
time64_t ktime_get_boottime_seconds(void)
{
return ktime_divns(ktime_get_boottime(), NSEC_PER_SEC);
}
EXPORT_SYMBOL_GPL(ktime_get_boottime_seconds);
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