mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 18:19:02 +00:00
4a81b00a05
Rename and reorganize backported patches. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
79 lines
2.7 KiB
Diff
79 lines
2.7 KiB
Diff
From e5f9f41d5e62004c913bfd4ddf06abe032f5ce1c Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
|
|
Date: Fri, 5 Mar 2021 08:01:32 +0100
|
|
Subject: [PATCH 3/3] hwrng: bcm2835 - add reset support
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
BCM6368 devices need to reset the IPSEC controller in order to generate true
|
|
random numbers.
|
|
|
|
This is what BCM6368 produces without a reset:
|
|
root@OpenWrt:/# cat /dev/hwrng | rngtest -c 1000
|
|
rngtest 6.10
|
|
Copyright (c) 2004 by Henrique de Moraes Holschuh
|
|
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
rngtest: starting FIPS tests...
|
|
rngtest: bits received from input: 20000032
|
|
rngtest: FIPS 140-2 successes: 0
|
|
rngtest: FIPS 140-2 failures: 1000
|
|
rngtest: FIPS 140-2(2001-10-10) Monobit: 2
|
|
rngtest: FIPS 140-2(2001-10-10) Poker: 1000
|
|
rngtest: FIPS 140-2(2001-10-10) Runs: 1000
|
|
rngtest: FIPS 140-2(2001-10-10) Long run: 30
|
|
rngtest: FIPS 140-2(2001-10-10) Continuous run: 0
|
|
rngtest: input channel speed: (min=37.253; avg=320.827; max=635.783)Mibits/s
|
|
rngtest: FIPS tests speed: (min=12.141; avg=15.034; max=16.428)Mibits/s
|
|
rngtest: Program run time: 1336176 microseconds
|
|
|
|
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
|
|
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
|
|
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
|
|
---
|
|
drivers/char/hw_random/bcm2835-rng.c | 10 ++++++++++
|
|
1 file changed, 10 insertions(+)
|
|
|
|
--- a/drivers/char/hw_random/bcm2835-rng.c
|
|
+++ b/drivers/char/hw_random/bcm2835-rng.c
|
|
@@ -13,6 +13,7 @@
|
|
#include <linux/platform_device.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/clk.h>
|
|
+#include <linux/reset.h>
|
|
|
|
#define RNG_CTRL 0x0
|
|
#define RNG_STATUS 0x4
|
|
@@ -32,6 +33,7 @@ struct bcm2835_rng_priv {
|
|
void __iomem *base;
|
|
bool mask_interrupts;
|
|
struct clk *clk;
|
|
+ struct reset_control *reset;
|
|
};
|
|
|
|
static inline struct bcm2835_rng_priv *to_rng_priv(struct hwrng *rng)
|
|
@@ -94,6 +96,10 @@ static int bcm2835_rng_init(struct hwrng
|
|
return ret;
|
|
}
|
|
|
|
+ ret = reset_control_reset(priv->reset);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
if (priv->mask_interrupts) {
|
|
/* mask the interrupt */
|
|
val = rng_readl(priv, RNG_INT_MASK);
|
|
@@ -159,6 +165,10 @@ static int bcm2835_rng_probe(struct plat
|
|
if (PTR_ERR(priv->clk) == -EPROBE_DEFER)
|
|
return -EPROBE_DEFER;
|
|
|
|
+ priv->reset = devm_reset_control_get_optional_exclusive(dev, NULL);
|
|
+ if (IS_ERR(priv->reset))
|
|
+ return PTR_ERR(priv->reset);
|
|
+
|
|
priv->rng.name = pdev->name;
|
|
priv->rng.init = bcm2835_rng_init;
|
|
priv->rng.read = bcm2835_rng_read;
|