mtd: rawnand: Add support for secure regions in NAND memory

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On a typical end product, a vendor may choose to secure some regions in
the NAND memory which are supposed to stay intact between FW upgrades.
The access to those regions will be blocked by a secure element like
Trustzone. So the normal world software like Linux kernel should not
touch these regions (including reading).

The regions are declared using a NAND chip DT property,
"secure-regions". So let's make use of this property in the raw NAND
core and skip access to the secure regions present in a system.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210402150128.29128-4-manivannan.sadhasivam@linaro.org

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This commit is contained in:

Manivannan Sadhasivam 2021-04-02 20:31:27 +05:30 • committed by Miquel Raynal

parent ee590106c3

commit 13b8976827

2 changed files with 113 additions and 1 deletions

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100

drivers/mtd/nand/raw/nand_base.c

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14

include/linux/mtd/rawnand.h

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