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Sandbox NAND
============
The sandbox NAND controller emulates a NAND controller and attached devices.
Required properties:
- compatible: "sandbox,nand"
- #address-cells: Must be 1
- #size-cells: Must be 0
Any number of child nodes may be present, each representing a NAND device:
Required Properties:
- reg: The chip-select(s) to use. Only single-die devices are supported for now.
- sandbox,id: An array of bytes to be reported by the READID (0x90) command
- sandbox,erasesize: The block size (erase size) of the device, in bytes. Must
be a power-of-two multiple of the page size.
- sandbox,oobsize: The size of the OOB area per page, in bytes.
- sandbox,pagesize: The page size (write size) of the device, in bytes. Must be
a power of two.
- sandbox,pages: The total number of pages in the device.
- sandbox,err-count: Number of bit errors to inject per step.
- sandbox,err-step-size: Size of the step to use when injecting errors, in
bytes. Must evenly divide the page size.
Optional properties:
- sandbox,onfi: The complete ONFI parameter page, including the CRC. Should be
exactly 256 bytes.
- Any common NAND chip properties as documented by Linux's
Documentation/devicetree/bindings/mtd/raw-nand-chip.yaml
To match U-Boot's error correction capabilities, errors are only injected into
the data area and the ECC codes. Other data in the OOB area is never corrupted.
Generally, sandbox,err-step-size should be the same as the ECC step size, and
sandbox,err-count should be less than the number of correctable bit errors (the
ECC strength).
Example
-------
nand-controller {
#address-cells = <1>;
#size-cells = <0>;
compatible = "sandbox,nand";
nand@0 {
reg = <0>;
nand-ecc-mode = "soft";
sandbox,id = [00 e3];
sandbox,erasesize = <(8 * 1024)>;
sandbox,oobsize = <16>;
sandbox,pagesize = <512>;
sandbox,pages = <0x2000>;
sandbox,err-count = <1>;
sandbox,err-step-size = <512>;
};
};
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