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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2017-02-07 21:07:54 +0100 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2017-02-07 23:00:16 +0100 |
| commit | 96aa0c6b0b179518e0c228362ea55f1c7793bb3a (patch) | |
| tree | 3244114239a7bbf380ee9fa76680b55e459e06c0 /target/linux/brcm2708/patches-4.9/0027-bcm2835-rng-Avoid-initialising-if-already-enabled.patch | |
| parent | 6b5c3fd055f64ce0f9d111820123caf33632a51f (diff) | |
| download | upstream-96aa0c6b0b179518e0c228362ea55f1c7793bb3a.tar.gz upstream-96aa0c6b0b179518e0c228362ea55f1c7793bb3a.tar.bz2 upstream-96aa0c6b0b179518e0c228362ea55f1c7793bb3a.zip | |
brcm2708: add linux 4.9 support
Patches from Raspberry Pi repo:
https://github.com/raspberrypi/linux/commits/rpi-4.9.y
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/0027-bcm2835-rng-Avoid-initialising-if-already-enabled.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/0027-bcm2835-rng-Avoid-initialising-if-already-enabled.patch | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/0027-bcm2835-rng-Avoid-initialising-if-already-enabled.patch b/target/linux/brcm2708/patches-4.9/0027-bcm2835-rng-Avoid-initialising-if-already-enabled.patch new file mode 100644 index 0000000000..1fb21843ba --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/0027-bcm2835-rng-Avoid-initialising-if-already-enabled.patch @@ -0,0 +1,26 @@ +From a195976d635c3672cae684d6338655aa25f6d98c 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 | 7 ++++--- + 1 file changed, 4 insertions(+), 3 deletions(-) + +--- a/drivers/char/hw_random/bcm2835-rng.c ++++ b/drivers/char/hw_random/bcm2835-rng.c +@@ -102,9 +102,10 @@ static int bcm2835_rng_probe(struct plat + rng_setup(rng_base); + + /* set warm-up count & enable */ +- __raw_writel(RNG_WARMUP_COUNT, rng_base + RNG_STATUS); +- __raw_writel(RNG_RBGEN, rng_base + RNG_CTRL); +- ++ if (!(__raw_readl(rng_base + RNG_CTRL) & RNG_RBGEN)) { ++ __raw_writel(RNG_WARMUP_COUNT, rng_base + RNG_STATUS); ++ __raw_writel(RNG_RBGEN, rng_base + RNG_CTRL); ++ } + /* register driver */ + err = hwrng_register(&bcm2835_rng_ops); + if (err) { |