diff options
| author | Victoria Milhoan <vicki.milhoan@freescale.com> | 2015-08-05 11:28:48 -0700 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-08-10 23:19:04 +0800 |
| commit | bf83490ee4207de3af59b63870eb9f72f1e523f1 (patch) | |
| tree | e150894338ef2e9fda858a8d35ae46570dbdffed /drivers/crypto/caam/caamrng.c | |
| parent | 350cdfeba888c21341ad2989c5930a2708def579 (diff) | |
crypto: caam - Detect hardware features during algorithm registration
Register only algorithms supported by CAAM hardware, using the CHA
version and instantiation registers to identify hardware capabilities.
Signed-off-by: Victoria Milhoan <vicki.milhoan@freescale.com>
Tested-by: Horia Geantă <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/caam/caamrng.c')
| -rw-r--r-- | drivers/crypto/caam/caamrng.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c index a1d21d5fb2ff..345024c22467 100644 --- a/drivers/crypto/caam/caamrng.c +++ b/drivers/crypto/caam/caamrng.c @@ -315,7 +315,7 @@ static int __init caam_rng_init(void) struct device_node *dev_node; struct platform_device *pdev; struct device *ctrldev; - void *priv; + struct caam_drv_private *priv; int err; dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0"); @@ -342,6 +342,10 @@ static int __init caam_rng_init(void) if (!priv) return -ENODEV; + /* Check for an instantiated RNG before registration */ + if (!(rd_reg32(&priv->ctrl->perfmon.cha_num_ls) & CHA_ID_LS_RNG_MASK)) + return -ENODEV; + dev = caam_jr_alloc(); if (IS_ERR(dev)) { pr_err("Job Ring Device allocation for transform failed\n"); |