diff options
| -rw-r--r-- | drivers/char/hw_random/bcm2835-rng.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c index 99b56fd5482c..3a607472687d 100644 --- a/drivers/char/hw_random/bcm2835-rng.c +++ b/drivers/char/hw_random/bcm2835-rng.c @@ -42,6 +42,17 @@ static inline struct bcm2835_rng_priv *to_rng_priv(struct hwrng *rng) return container_of(rng, struct bcm2835_rng_priv, rng); } +static inline u32 rng_readl(struct bcm2835_rng_priv *priv, u32 offset) +{ + return readl(priv->base + offset); +} + +static inline void rng_writel(struct bcm2835_rng_priv *priv, u32 val, + u32 offset) +{ + writel(val, priv->base + offset); +} + static int bcm2835_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait) { @@ -49,18 +60,18 @@ static int bcm2835_rng_read(struct hwrng *rng, void *buf, size_t max, u32 max_words = max / sizeof(u32); u32 num_words, count; - while ((__raw_readl(priv->base + RNG_STATUS) >> 24) == 0) { + while ((rng_readl(priv, RNG_STATUS) >> 24) == 0) { if (!wait) return 0; cpu_relax(); } - num_words = readl(priv->base + RNG_STATUS) >> 24; + num_words = rng_readl(priv, RNG_STATUS) >> 24; if (num_words > max_words) num_words = max_words; for (count = 0; count < num_words; count++) - ((u32 *)buf)[count] = readl(priv->base + RNG_DATA); + ((u32 *)buf)[count] = rng_readl(priv, RNG_DATA); return num_words * sizeof(u32); } @@ -79,14 +90,14 @@ static int bcm2835_rng_init(struct hwrng *rng) if (priv->mask_interrupts) { /* mask the interrupt */ - val = readl(priv->base + RNG_INT_MASK); + val = rng_readl(priv, RNG_INT_MASK); val |= RNG_INT_OFF; - writel(val, priv->base + RNG_INT_MASK); + rng_writel(priv, val, RNG_INT_MASK); } /* set warm-up count & enable */ - __raw_writel(RNG_WARMUP_COUNT, priv->base + RNG_STATUS); - __raw_writel(RNG_RBGEN, priv->base + RNG_CTRL); + rng_writel(priv, RNG_WARMUP_COUNT, RNG_STATUS); + rng_writel(priv, RNG_RBGEN, RNG_CTRL); return ret; } @@ -96,7 +107,7 @@ static void bcm2835_rng_cleanup(struct hwrng *rng) struct bcm2835_rng_priv *priv = to_rng_priv(rng); /* disable rng hardware */ - __raw_writel(0, priv->base + RNG_CTRL); + rng_writel(priv, 0, RNG_CTRL); if (!IS_ERR(priv->clk)) clk_disable_unprepare(priv->clk); |