diff options
| author |   Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2019-05-24 18:26:49 +0200 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2019-05-30 15:35:45 +0800 |
| commit | da001fb651b00e1deeaf24767dd691ae8152a4f5 (patch) | |
| tree | bdbc39075a1846256f4c7d695cb659641a744eab /drivers/crypto/atmel-i2c.c | |
| parent | crypto: atmel-ecc - factor out code that can be shared (diff) | |
| download | linux-dev-da001fb651b00e1deeaf24767dd691ae8152a4f5.tar.xz linux-dev-da001fb651b00e1deeaf24767dd691ae8152a4f5.zip | |
crypto: atmel-i2c - add support for SHA204A random number generator
The Linaro/96boards Secure96 mezzanine contains (among other things)
an Atmel SHA204A symmetric crypto processor. This chip implements a
number of different functionalities, but one that is highly useful
for many different 96boards platforms is the random number generator.
So let's implement a driver for the SHA204A, and for the time being,
implement support for the random number generator only.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/atmel-i2c.c')
| -rw-r--r-- | drivers/crypto/atmel-i2c.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/crypto/atmel-i2c.c b/drivers/crypto/atmel-i2c.c index 5e099368d120..be49ab7f4338 100644 --- a/drivers/crypto/atmel-i2c.c +++ b/drivers/crypto/atmel-i2c.c @@ -58,6 +58,21 @@ void atmel_i2c_init_read_cmd(struct atmel_i2c_cmd *cmd) } EXPORT_SYMBOL(atmel_i2c_init_read_cmd); +void atmel_i2c_init_random_cmd(struct atmel_i2c_cmd *cmd) +{ + cmd->word_addr = COMMAND; + cmd->opcode = OPCODE_RANDOM; + cmd->param1 = 0; + cmd->param2 = 0; + cmd->count = RANDOM_COUNT; + + atmel_i2c_checksum(cmd); + + cmd->msecs = MAX_EXEC_TIME_RANDOM; + cmd->rxsize = RANDOM_RSP_SIZE; +} +EXPORT_SYMBOL(atmel_i2c_init_random_cmd); + void atmel_i2c_init_genkey_cmd(struct atmel_i2c_cmd *cmd, u16 keyid) { cmd->word_addr = COMMAND; |