diff options
| author | Romain Perier <romain.perier@free-electrons.com> | 2016-09-16 13:08:53 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-10-21 05:27:51 +0300 |
| commit | e54feeb0db9c6fc5d6b75cc045c9e4578534ec2e (patch) | |
| tree | 9824104d3509ca55a701219aca94214da5a1e08b /drivers/char/hw_random | |
| parent | b23d2d92ce34a487436dba8549a302729c5a40a2 (diff) | |
| download | linux-e54feeb0db9c6fc5d6b75cc045c9e4578534ec2e.tar.xz | |
hwrng: omap - Add support for 128-bit output of data
So far, this driver only supports up to 64 bits of output data generated
by an RNG. Some IP blocks, like the SafeXcel IP-76 supports up to 128
bits of output data. This commits renames registers descriptions
OUTPUT_L_REG and OUTPUT_H_REG to OUTPUT_0_REG and OUPUT_1_REG,
respectively. It also adds two new values to the enumeration of existing
registers: OUTPUT_2_REG and OUTPUT_3_REG.
Signed-off-by: Romain Perier <romain.perier@free-electrons.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/char/hw_random')
| -rw-r--r-- | drivers/char/hw_random/omap-rng.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c index e4f71c8147f9..6c18540c8b43 100644 --- a/drivers/char/hw_random/omap-rng.c +++ b/drivers/char/hw_random/omap-rng.c @@ -65,8 +65,10 @@ #define OMAP4_RNG_OUTPUT_SIZE 0x8 enum { - RNG_OUTPUT_L_REG = 0, - RNG_OUTPUT_H_REG, + RNG_OUTPUT_0_REG = 0, + RNG_OUTPUT_1_REG, + RNG_OUTPUT_2_REG, + RNG_OUTPUT_3_REG, RNG_STATUS_REG, RNG_INTMASK_REG, RNG_INTACK_REG, @@ -82,7 +84,7 @@ enum { }; static const u16 reg_map_omap2[] = { - [RNG_OUTPUT_L_REG] = 0x0, + [RNG_OUTPUT_0_REG] = 0x0, [RNG_STATUS_REG] = 0x4, [RNG_CONFIG_REG] = 0x28, [RNG_REV_REG] = 0x3c, @@ -90,8 +92,8 @@ static const u16 reg_map_omap2[] = { }; static const u16 reg_map_omap4[] = { - [RNG_OUTPUT_L_REG] = 0x0, - [RNG_OUTPUT_H_REG] = 0x4, + [RNG_OUTPUT_0_REG] = 0x0, + [RNG_OUTPUT_1_REG] = 0x4, [RNG_STATUS_REG] = 0x8, [RNG_INTMASK_REG] = 0xc, [RNG_INTACK_REG] = 0x10, @@ -163,7 +165,7 @@ static int omap_rng_do_read(struct hwrng *rng, void *data, size_t max, if (!present) return 0; - memcpy_fromio(data, priv->base + priv->pdata->regs[RNG_OUTPUT_L_REG], + memcpy_fromio(data, priv->base + priv->pdata->regs[RNG_OUTPUT_0_REG], priv->pdata->data_size); if (priv->pdata->regs[RNG_INTACK_REG]) |