Commit graph

2 commits

Author SHA1 Message Date
Stefan Roese
456ecd08ec lib/crc8: Add crc start value
To make the usage of this function more flexible, lets add the CRC start
value as parameter to this function. This way it can be used by other
functions requiring different start values than 0 as well.

For non-zero CRC start values to work, I've reworked the function a bit.
The new implementation is copied from the Linux version in
drivers/i2c/i2c-core.c / i2c_smbus_pec(). Which supports non-zero
CRC stating values.

I've double-checked that the results for zero starting values are
identical to the results from the original version of this function.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-04-11 20:48:26 -04:00
Simon Glass
60d18d3fe9 Add crc8 routine
Add an implementation of the CRC8 algorithm. This is required by the TPM
emulation, but is probably useful to U-Boot in general.

Signed-off-by: Simon Glass <sjg@chromium.org>

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
2014-01-08 17:20:34 -07:00