mbox series

[v3,0/3] Add support for secure regions in Qcom NANDc driver

Message ID 20210225140842.66927-1-manivannan.sadhasivam@linaro.org
Headers show
Series Add support for secure regions in Qcom NANDc driver | expand

Message

Manivannan Sadhasivam Feb. 25, 2021, 2:08 p.m. UTC
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 this series adds a property for declaring such secure regions in DT
so that the driver can skip touching them. While at it, the Qcom NANDc
DT binding is also converted to YAML format.

Thanks,
Mani

Changes in v3:

* Removed the nand prefix from DT property and moved the property parsing
  logic before nand_scan() in driver.

Changes in v2:

* Moved the secure-regions property to generic NAND binding as a NAND
  chip property and renamed it as "nand-secure-regions".

Manivannan Sadhasivam (3):
  dt-bindings: mtd: Convert Qcom NANDc binding to YAML
  dt-bindings: mtd: Add a property to declare secure regions in NAND
    chips
  mtd: rawnand: qcom: Add support for secure regions in NAND memory

 .../bindings/mtd/nand-controller.yaml         |   7 +
 .../devicetree/bindings/mtd/qcom,nandc.yaml   | 196 ++++++++++++++++++
 .../devicetree/bindings/mtd/qcom_nandc.txt    | 142 -------------
 drivers/mtd/nand/raw/qcom_nandc.c             |  72 ++++++-
 4 files changed, 266 insertions(+), 151 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
 delete mode 100644 Documentation/devicetree/bindings/mtd/qcom_nandc.txt