mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-03-09 15:40:20 +00:00
30 lines
995 B
Diff
30 lines
995 B
Diff
From 15e66aad9ff3bf9978221f8f261c2bfce1238687 Mon Sep 17 00:00:00 2001
|
|
From: popcornmix <popcornmix@gmail.com>
|
|
Date: Tue, 6 Dec 2016 17:05:39 +0000
|
|
Subject: [PATCH 021/432] bcm2835-rng: Avoid initialising if already enabled
|
|
|
|
Avoids the 0x40000 cycles of warmup again if firmware has already used it
|
|
---
|
|
drivers/char/hw_random/bcm2835-rng.c | 6 ++++--
|
|
1 file changed, 4 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c
|
|
index 6767d965c36c..186fe2fcfeac 100644
|
|
--- a/drivers/char/hw_random/bcm2835-rng.c
|
|
+++ b/drivers/char/hw_random/bcm2835-rng.c
|
|
@@ -105,8 +105,10 @@ 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;
|
|
}
|
|
--
|
|
2.19.1
|
|
|