Move the code to check if RNG block is instantitated into a shared
function. This will be used by commits that follow.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
Cc: Chris Healy <cphealy@xxxxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: Horia Geantă <horia.geanta@xxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Iuliana Prodan <iuliana.prodan@xxxxxxx>
Cc: linux-imx@xxxxxxx
Cc: linux-crypto@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
drivers/crypto/caam/caamrng.c | 10 +---------
drivers/crypto/caam/intern.h | 14 ++++++++++++++
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index 6dde8ae3cd9b..70ddfbf90ac7 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -314,19 +314,11 @@ void caam_rng_exit(void)
int caam_rng_init(struct device *ctrldev)
{
struct device *dev;
- u32 rng_inst;
struct caam_drv_private *priv = dev_get_drvdata(ctrldev);
int err;
init_done = false;
- /* Check for an instantiated RNG before registration */
- if (priv->era < 10)
- rng_inst = (rd_reg32(&priv->ctrl->perfmon.cha_num_ls) &
- CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT;
- else
- rng_inst = rd_reg32(&priv->ctrl->vreg.rng) & CHA_VER_NUM_MASK;
-
- if (!rng_inst)
+ if (!caam_has_rng(priv))
return 0;
dev = caam_jr_alloc();
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index c7c10c90464b..f815e1ad4608 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -104,6 +104,20 @@ struct caam_drv_private {
#endif
};
+static inline bool caam_has_rng(struct caam_drv_private *priv)
+{
+ u32 rng_inst;
+
+ /* Check for an instantiated RNG before registration */
+ if (priv->era < 10)
+ rng_inst = (rd_reg32(&priv->ctrl->perfmon.cha_num_ls) &
+ CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT;
+ else
+ rng_inst = rd_reg32(&priv->ctrl->vreg.rng) & CHA_VER_NUM_MASK;
+
+ return rng_inst;
+}
+
#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API
int caam_algapi_init(struct device *dev);
--
2.21.0
