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The 'era' information can be retrieved from CAAM registers, so introduce a caam_get_era_from_hw() function that gets it via register reads in case the 'fsl,sec-era' property is not passed in the device tree. This function is based on the U-Boot implementation from drivers/crypto/fsl/sec.c Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Reviewed-by: Horia Geantă <horia.geanta@nxp.com> Tested-by: Breno Lima <breno.lima@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.