crypto: caam - adjust RNG timing to support more devices

Adjust RNG timing parameters to support more i.MX6 devices.

Signed-off-by: Victoria Milhoan <vicki.milhoan@freescale.com>
Signed-off-by: Dan Douglass <dan.douglass@nxp.com>
Signed-off-by: Vipul Kumar <vipul_kumar@mentor.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Reviewed-by: Gaurav Jain <gaurav.jain@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index af0db18..ee6478e 100644 (file)
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -389,8 +389,8 @@ static void kick_trng(struct device *dev, int ent_delay)
        wr_reg32(&r4tst->rtsdctl, val);
        /* min. freq. count, equal to 1/4 of the entropy sample length */
        wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2);
-       /* disable maximum frequency count */
-       wr_reg32(&r4tst->rtfrqmax, RTFRQMAX_DISABLE);
+       /* max. freq. count, equal to 16 times the entropy sample length */
+       wr_reg32(&r4tst->rtfrqmax, ent_delay << 4);
        /* read the control register */
        val = rd_reg32(&r4tst->rtmctl);
 start_rng: