diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-08-21 10:54:34 +0200 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-08-21 19:07:07 +0200 |
| commit | 8299d1f057439f94c6a4412e2e5c5082b82a30c9 (patch) | |
| tree | 1bf678d61f11f7394493be464c7876e496f7faed /target/linux/bcm27xx/patches-5.10/950-0021-bcm2835-rng-Avoid-initialising-if-already-enabled.patch | |
| parent | 33b6885975ce376ff075362b7f0890326043111b (diff) | |
| download | upstream-8299d1f057439f94c6a4412e2e5c5082b82a30c9.tar.gz upstream-8299d1f057439f94c6a4412e2e5c5082b82a30c9.tar.bz2 upstream-8299d1f057439f94c6a4412e2e5c5082b82a30c9.zip | |
bcm27xx: add kernel 5.10 support
Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted
patches, wireless patches and defconfig patches.
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 4B v1.1 4G
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0021-bcm2835-rng-Avoid-initialising-if-already-enabled.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0021-bcm2835-rng-Avoid-initialising-if-already-enabled.patch | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0021-bcm2835-rng-Avoid-initialising-if-already-enabled.patch b/target/linux/bcm27xx/patches-5.10/950-0021-bcm2835-rng-Avoid-initialising-if-already-enabled.patch new file mode 100644 index 0000000000..bace3071d5 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0021-bcm2835-rng-Avoid-initialising-if-already-enabled.patch @@ -0,0 +1,25 @@ +From 102d9fbd0a8d762835a9f9a7917e9eace3a9d84e Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Tue, 6 Dec 2016 17:05:39 +0000 +Subject: [PATCH] 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(-) + +--- 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 + } + + /* 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; + } |