drivers: nvmem: atmel_sfc: check the length before read cell

Check requested NVMEM cells length in Atmel SFC driver to
prevent issues in case the length is greater than the fuse
size.

Signed-off-by

drivers: nvmem: atmel_sfc: check the length before read cell

Check requested NVMEM cells length in Atmel SFC driver to
prevent issues in case the length is greater than the fuse
size.

Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: sam: use header file "platform_config.h" instead of "sama5d2.h"

As "sama5d2.h" is included in "platform_config.h" it's better to use
"#include <platform_config.h>" for support more devices

drivers: sam: use header file "platform_config.h" instead of "sama5d2.h"

As "sama5d2.h" is included in "platform_config.h" it's better to use
"#include <platform_config.h>" for support more devices later.

Signed-off-by: Tony Han <tony.han@microchip.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

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drivers: nvmem: add atmel_sfc driver

This driver handles the secure fuse controller that is present on the
sama5d2 series. It allows to read a 544 bits user defined area of fuses.
Content is exposed

drivers: nvmem: add atmel_sfc driver

This driver handles the secure fuse controller that is present on the
sama5d2 series. It allows to read a 544 bits user defined area of fuses.
Content is exposed through 17 32 bits registers. Rather than adding
complicated logic in atmel_sfc_read() for individual bytes, read all
the 16 registers at once (which are loaded at SoC startup from fuses)
and store them in an array convenient for copying from it to buffers.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

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