From: Victoria Milhoan <vicki.milhoan@freescale.com>
Date: Mon, 12 Jun 2023 08:26:15 +0000 (+0200)
Subject: crypto: caam - adjust RNG timing to support more devices
X-Git-Tag: v6.5-rc1~108^2~23
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef492d080302913e85122a2d92efa2ca174930f8;p=thirdparty%2Fkernel%2Fstable.git

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 af0db18b931e7..ee6478eea933f 100644
--- 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: