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hwrng: bcm2835 - Move enabling to hwrng::init 

We should be moving the enabling of the HWRNG into a hwrng::init
callback since we can be disabled and enabled every time a different
hwrng is selected in the system.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Florian Fainelli 2017-11-07 16:44:40 -08:00 committed by Herbert Xu
parent b788479f68
commit a815777553
1 changed files with 12 additions and 4 deletions
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16
drivers/char/hw_random/bcm2835-rng.c
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@ -72,6 +72,17 @@ static int bcm2835_rng_read(struct hwrng *rng, void *buf, size_t max,
return num_words * sizeof(u32);
}
static int bcm2835_rng_init(struct hwrng *rng)
{
struct bcm2835_rng_priv *priv = to_rng_priv(rng);
/* set warm-up count & enable */
__raw_writel(RNG_WARMUP_COUNT, priv->base + RNG_STATUS);
__raw_writel(RNG_RBGEN, priv->base + RNG_CTRL);
return 0;
}
static const struct of_device_id bcm2835_rng_of_match[] = {
{ .compatible = "brcm,bcm2835-rng"},
{ .compatible = "brcm,bcm-nsp-rng", .data = nsp_rng_init},
@ -105,6 +116,7 @@ static int bcm2835_rng_probe(struct platform_device *pdev)
}
priv->rng.name = "bcm2835-rng";
priv->rng.init = bcm2835_rng_init;
priv->rng.read = bcm2835_rng_read;
rng_id = of_match_node(bcm2835_rng_of_match, np);
@ -116,10 +128,6 @@ static int bcm2835_rng_probe(struct platform_device *pdev)
if (rng_setup)
rng_setup(priv->base);
/* set warm-up count & enable */
__raw_writel(RNG_WARMUP_COUNT, priv->base + RNG_STATUS);
__raw_writel(RNG_RBGEN, priv->base + RNG_CTRL);
/* register driver */
err = hwrng_register(&priv->rng);
if (err)