diff options
| author | Kim Phillips <kim.phillips@freescale.com> | 2012-09-17 18:21:55 -0500 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2012-09-27 13:32:15 +0800 |
| commit | a5bbf6fa79abe0cb64aaebc3455f9ba779d6a36f (patch) | |
| tree | 3d41e7137a355f4800733845c744e616cc18e23d /drivers/crypto | |
| parent | b6f3fefe1fa1e8ea8f6b654e7d552253373cd1c0 (diff) | |
| download | lwn-a5bbf6fa79abe0cb64aaebc3455f9ba779d6a36f.tar.gz lwn-a5bbf6fa79abe0cb64aaebc3455f9ba779d6a36f.zip | |
crypto: caam - increase TRNG clocks per sample
we need to configure the TRNG to use more clocks per sample
to handle the two back-to-back 64KiB random descriptor requests
on higher frequency P5040s.
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index 414ba20c05a1..bf20dd891705 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -129,7 +129,7 @@ static int instantiate_rng(struct device *jrdev) /* * By default, the TRNG runs for 200 clocks per sample; - * 800 clocks per sample generates better entropy. + * 1600 clocks per sample generates better entropy. */ static void kick_trng(struct platform_device *pdev) { @@ -144,9 +144,9 @@ static void kick_trng(struct platform_device *pdev) /* put RNG4 into program mode */ setbits32(&r4tst->rtmctl, RTMCTL_PRGM); - /* 800 clocks per sample */ + /* 1600 clocks per sample */ val = rd_reg32(&r4tst->rtsdctl); - val = (val & ~RTSDCTL_ENT_DLY_MASK) | (800 << RTSDCTL_ENT_DLY_SHIFT); + val = (val & ~RTSDCTL_ENT_DLY_MASK) | (1600 << RTSDCTL_ENT_DLY_SHIFT); wr_reg32(&r4tst->rtsdctl, val); /* min. freq. count */ wr_reg32(&r4tst->rtfrqmin, 400); |