Source of random32.c - linux-imx - PHYTEC BitBucket (Stash)

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        u32 weak_seed = (i + jiffies) ^ random_get_entropy();
​
        prandom_seed_early(state, weak_seed, true);
        prandom_warmup(state);
    }
​
    return 0;
}
core_initcall(prandom_init);
​
static void __prandom_timer(unsigned long dontcare);
static void __prandom_timer(struct timer_list *unused);
​
static DEFINE_TIMER(seed_timer, __prandom_timer);
​
static void __prandom_timer(unsigned long dontcare)
static void __prandom_timer(struct timer_list *unused)
{
    u32 entropy;
    unsigned long expires;
​
    get_random_bytes(&entropy, sizeof(entropy));
    prandom_seed(entropy);
​
    /* reseed every ~60 seconds, in [40 .. 80) interval with slack */
    expires = 40 + prandom_u32_max(40);
    seed_timer.expires = jiffies + msecs_to_jiffies(expires * MSEC_PER_SEC);