diff options
Diffstat (limited to 'drivers/crypto/caam/ctrl.c')
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index 111ac1ffbc11..c6210373b1be 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -357,8 +357,17 @@ static void kick_trng(struct platform_device *pdev, int ent_delay) wr_reg32(&r4tst->rtfrqmin, ent_delay >> 2); /* disable maximum frequency count */ wr_reg32(&r4tst->rtfrqmax, RTFRQMAX_DISABLE); + /* read the control register */ + val = rd_reg32(&r4tst->rtmctl); + /* + * select raw sampling in both entropy shifter + * and statistical checker + */ + setbits32(&val, RTMCTL_SAMP_MODE_RAW_ES_SC); /* put RNG4 into run mode */ - clrbits32(&r4tst->rtmctl, RTMCTL_PRGM); + clrbits32(&val, RTMCTL_PRGM); + /* write back the control register */ + wr_reg32(&r4tst->rtmctl, val); } /** |