diff options
| -rw-r--r-- | drivers/crypto/caam/ctrl.c | 10 | ||||
| -rw-r--r-- | drivers/crypto/caam/intern.h | 3 | ||||
| -rw-r--r-- | drivers/crypto/caam/regs.h | 1 |
3 files changed, 10 insertions, 4 deletions
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index f2c8595ccb9b..c47e25eee926 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -163,14 +163,16 @@ static void kick_trng(struct platform_device *pdev) /* put RNG4 into program mode */ setbits32(&r4tst->rtmctl, RTMCTL_PRGM); - /* 1600 clocks per sample */ + /* Set clocks per sample to the default, and divider to zero */ val = rd_reg32(&r4tst->rtsdctl); - val = (val & ~RTSDCTL_ENT_DLY_MASK) | (1600 << RTSDCTL_ENT_DLY_SHIFT); + val = ((val & ~RTSDCTL_ENT_DLY_MASK) | + (RNG4_ENT_CLOCKS_SAMPLE << RTSDCTL_ENT_DLY_SHIFT)) & + ~RTMCTL_OSC_DIV_MASK; wr_reg32(&r4tst->rtsdctl, val); /* min. freq. count */ - wr_reg32(&r4tst->rtfrqmin, 400); + wr_reg32(&r4tst->rtfrqmin, RNG4_ENT_CLOCKS_SAMPLE / 4); /* max. freq. count */ - wr_reg32(&r4tst->rtfrqmax, 6400); + wr_reg32(&r4tst->rtfrqmax, RNG4_ENT_CLOCKS_SAMPLE * 8); /* put RNG4 into run mode */ clrbits32(&r4tst->rtmctl, RTMCTL_PRGM); } diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h index 18e7385fb2d8..1f818ffb831a 100644 --- a/drivers/crypto/caam/intern.h +++ b/drivers/crypto/caam/intern.h @@ -12,6 +12,9 @@ #define JOBR_UNASSIGNED 0 #define JOBR_ASSIGNED 1 +/* Default clock/sample settings for an RNG4 entropy source */ +#define RNG4_ENT_CLOCKS_SAMPLE 1600 + /* Currently comes from Kconfig param as a ^2 (driver-required) */ #define JOBR_DEPTH (1 << CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE) diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h index fd8a2a251b8a..04ae9d4167b0 100644 --- a/drivers/crypto/caam/regs.h +++ b/drivers/crypto/caam/regs.h @@ -297,6 +297,7 @@ struct rngtst { /* RNG4 TRNG test registers */ struct rng4tst { #define RTMCTL_PRGM 0x00010000 /* 1 -> program mode, 0 -> run mode */ +#define RTMCTL_OSC_DIV_MASK 0xc /* select oscillator divider value */ u32 rtmctl; /* misc. control register */ u32 rtscmisc; /* statistical check misc. register */ u32 rtpkrrng; /* poker range register */ |