From: Herbert Xu Date: Fri, 18 Aug 2023 08:47:02 +0000 (+0800) Subject: Revert "crypto: caam - adjust RNG timing to support more devices" X-Git-Tag: v6.6.7~2162^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=83874b8e97f895e62d9ab03223318176d5e78203;p=platform%2Fkernel%2Flinux-starfive.git Revert "crypto: caam - adjust RNG timing to support more devices" This reverts commit ef492d080302913e85122a2d92efa2ca174930f8. This patch breaks the RNG on i.MX8MM. Reported-by: Bastian Krause Link: https://lore.kernel.org/all/e1f3f073-9d5e-1bae-f4f8-08dc48adad62@pengutronix.de/ Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index ff9ddbb..68e7377 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -382,8 +382,8 @@ static void kick_trng(struct device *dev, int ent_delay) val = ent_delay; /* min. freq. count, equal to 1/4 of the entropy sample length */ wr_reg32(&r4tst->rtfrqmin, val >> 2); - /* max. freq. count, equal to 16 times the entropy sample length */ - wr_reg32(&r4tst->rtfrqmax, val << 4); + /* disable maximum frequency count */ + wr_reg32(&r4tst->rtfrqmax, RTFRQMAX_DISABLE); } wr_reg32(&r4tst->rtsdctl, (val << RTSDCTL_ENT_DLY_SHIFT) |