diff options
| author | Matthias Brugger <mbrugger@suse.com> | 2020-12-18 11:57:08 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-01-03 08:41:37 +1100 |
| commit | 256693a36203f51b0a3659c8b215a7026a03a3f1 (patch) | |
| tree | 1b65fcf85bae09bed8c1e98974876097725eab05 /drivers/char/hw_random | |
| parent | 96a6af540396ed93ba231d0ae2e6fe196dc22032 (diff) | |
hwrng: iproc-rng200 - Move enable/disable in separate function
We are calling the same code for enable and disable the block in various
parts of the driver. Put that code into a new function to reduce code
duplication.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random')
| -rw-r--r-- | drivers/char/hw_random/iproc-rng200.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/drivers/char/hw_random/iproc-rng200.c b/drivers/char/hw_random/iproc-rng200.c index 70cd818a0f31..a43743887db1 100644 --- a/drivers/char/hw_random/iproc-rng200.c +++ b/drivers/char/hw_random/iproc-rng200.c @@ -53,14 +53,24 @@ struct iproc_rng200_dev { #define to_rng_priv(rng) container_of(rng, struct iproc_rng200_dev, rng) -static void iproc_rng200_restart(void __iomem *rng_base) +static void iproc_rng200_enable_set(void __iomem *rng_base, bool enable) { - uint32_t val; + u32 val; - /* Disable RBG */ val = ioread32(rng_base + RNG_CTRL_OFFSET); val &= ~RNG_CTRL_RNG_RBGEN_MASK; + + if (enable) + val |= RNG_CTRL_RNG_RBGEN_ENABLE; + iowrite32(val, rng_base + RNG_CTRL_OFFSET); +} + +static void iproc_rng200_restart(void __iomem *rng_base) +{ + uint32_t val; + + iproc_rng200_enable_set(rng_base, false); /* Clear all interrupt status */ iowrite32(0xFFFFFFFFUL, rng_base + RNG_INT_STATUS_OFFSET); @@ -82,11 +92,7 @@ static void iproc_rng200_restart(void __iomem *rng_base) val &= ~RBG_SOFT_RESET; iowrite32(val, rng_base + RBG_SOFT_RESET_OFFSET); - /* Enable RBG */ - val = ioread32(rng_base + RNG_CTRL_OFFSET); - val &= ~RNG_CTRL_RNG_RBGEN_MASK; - val |= RNG_CTRL_RNG_RBGEN_ENABLE; - iowrite32(val, rng_base + RNG_CTRL_OFFSET); + iproc_rng200_enable_set(rng_base, true); } static int iproc_rng200_read(struct hwrng *rng, void *buf, size_t max, @@ -153,13 +159,8 @@ static int iproc_rng200_read(struct hwrng *rng, void *buf, size_t max, static int iproc_rng200_init(struct hwrng *rng) { struct iproc_rng200_dev *priv = to_rng_priv(rng); - uint32_t val; - /* Setup RNG. */ - val = ioread32(priv->base + RNG_CTRL_OFFSET); - val &= ~RNG_CTRL_RNG_RBGEN_MASK; - val |= RNG_CTRL_RNG_RBGEN_ENABLE; - iowrite32(val, priv->base + RNG_CTRL_OFFSET); + iproc_rng200_enable_set(priv->base, true); return 0; } @@ -167,12 +168,8 @@ static int iproc_rng200_init(struct hwrng *rng) static void iproc_rng200_cleanup(struct hwrng *rng) { struct iproc_rng200_dev *priv = to_rng_priv(rng); - uint32_t val; - /* Disable RNG hardware */ - val = ioread32(priv->base + RNG_CTRL_OFFSET); - val &= ~RNG_CTRL_RNG_RBGEN_MASK; - iowrite32(val, priv->base + RNG_CTRL_OFFSET); + iproc_rng200_enable_set(priv->base, false); } static int iproc_rng200_probe(struct platform_device *pdev) |