Messages in this thread Patch in this message | | | From | Manivannan Sadhasivam <> | Subject | [PATCH v3 2/3] dt-bindings: mtd: Add a property to declare secure regions in NAND chips | Date | Thu, 25 Feb 2021 19:38:41 +0530 |
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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).
So let's add a property for declaring such secure regions so that the drivers can skip touching them.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> --- Documentation/devicetree/bindings/mtd/nand-controller.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/mtd/nand-controller.yaml b/Documentation/devicetree/bindings/mtd/nand-controller.yaml index d0e422f4b3e0..acc7dfd6ef28 100644 --- a/Documentation/devicetree/bindings/mtd/nand-controller.yaml +++ b/Documentation/devicetree/bindings/mtd/nand-controller.yaml @@ -143,6 +143,13 @@ patternProperties: Ready/Busy pins. Active state refers to the NAND ready state and should be set to GPIOD_ACTIVE_HIGH unless the signal is inverted. + secure-regions: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + Regions in the NAND chip which are protected using a secure element + like Trustzone. This property contains the start address and size of + the secure regions present. + required: - reg -- 2.25.1
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