f0ac5b2303
On STM32MP25, OTP area may be read/written by using BSEC (boot, security and OTP control). The BSEC internal peripheral is only managed by the secure world. The 12 Kbits of OTP (effective) are organized into the following regions: - lower OTP (OTP0 to OTP127) = 4096 lower OTP bits, bitwise (1-bit) programmable - mid OTP (OTP128 to OTP255) = 4096 middle OTP bits, bulk (32-bit) programmable - upper OTP (OTP256 to OTP383) = 4096 upper OTP bits, bulk (32-bit) programmable, only accessible when BSEC is in closed state. As HWKEY and ECIES key are only accessible by ROM code; only 368 OTP words are managed in this driver (OTP0 to OTP267). This patch adds the STM32MP25 configuration for reading and writing the OTP data using the OP-TEE BSEC TA services. Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20231215111536.316972-11-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.
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.