diff options
Diffstat (limited to 'drivers/char/hw_random/bcm2835-rng.c')
| -rw-r--r-- | drivers/char/hw_random/bcm2835-rng.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c index cbf5eaea662c..46ff253dc53a 100644 --- a/drivers/char/hw_random/bcm2835-rng.c +++ b/drivers/char/hw_random/bcm2835-rng.c @@ -102,8 +102,10 @@ static int bcm2835_rng_init(struct hwrng *rng) } /* set warm-up count & enable */ - rng_writel(priv, RNG_WARMUP_COUNT, RNG_STATUS); - rng_writel(priv, RNG_RBGEN, RNG_CTRL); + if (!(rng_readl(priv, RNG_CTRL) & RNG_RBGEN)) { + rng_writel(priv, RNG_WARMUP_COUNT, RNG_STATUS); + rng_writel(priv, RNG_RBGEN, RNG_CTRL); + } return ret; } |