These symbols are referenced only in this file and hence
should be static.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Tested-by: NTobias Rauter <tobiasrauter@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Use NULL instead of 0 for pointer variables.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Tested-by: NTobias Rauter <tobiasrauter@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

devm_* APIs are device managed and make cleanup and exit
code simpler.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Tested-by: NTobias Rauter <tobiasrauter@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

Commit 0998d063 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Tested-by: NTobias Rauter <tobiasrauter@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

This patch enables the DCP crypto functionality on imx28.
Currently, only aes-128-cbc is supported.
Moreover, the dcpboot misc-device, which is used by Freescale's
SDK tools and uses a non-software-readable OTP-key, is added.

Changes of v2:
- ring buffer for hardware-descriptors
- use of ablkcipher walk
- OTP key encryption/decryption via misc-device
  (compatible to Freescale-SDK)
- overall cleanup

The DCP is also capable of sha1/sha256 but I won't be able to add
that anytime soon.
Tested with built-in runtime-self-test, tcrypt and openssl via
cryptodev 1.6 on imx28-evk and a custom built imx28-board.
Signed-off-by: NTobias Rauter <tobias.rauter@gmail.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>