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| author | Florian Fainelli <f.fainelli@gmail.com> | 2017-11-08 01:44:40 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2017-11-29 06:43:43 +0100 |
| commit | a815777553826079929e0910fcf3fda9a1e8438b (patch) | |
| tree | 9fba82203dfd0b081f17c68fb0b9c1a1b804e449 | |
| parent | hwrng: bcm2835 - Define a driver private context (diff) | |
| download | linux-a815777553826079929e0910fcf3fda9a1e8438b.tar.xz linux-a815777553826079929e0910fcf3fda9a1e8438b.zip | |
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>
| -rw-r--r-- | drivers/char/hw_random/bcm2835-rng.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c index 0d72147ab45b..82000a637504 100644 --- a/drivers/char/hw_random/bcm2835-rng.c +++ b/drivers/char/hw_random/bcm2835-rng.c @@ -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) |