| Message ID | 20220609132344.17548-4-ansuelsmth@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support for unprotected spare data page | expand |
On Thu, 09 Jun 2022 15:23:44 +0200, Ansuel Smith wrote: > Document new qcom,boot-partition binding used to apply special > read/write layout to boot partitions. > > QCOM apply a special layout where spare data is not protected > by ECC for some special pages (used for boot partition). Add > Documentation on how to declare these special pages. > > Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> > Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> > --- > .../devicetree/bindings/mtd/qcom,nandc.yaml | 27 +++++++++++++++++++ > 1 file changed, 27 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml index 84ad7ff30121..482a2c068740 100644 --- a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml +++ b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml @@ -102,6 +102,31 @@ allOf: - const: rx - const: cmd + - if: + properties: + compatible: + contains: + enum: + - qcom,ipq806x-nand + + then: + properties: + qcom,boot-partitions: + $ref: /schemas/types.yaml#/definitions/uint32-matrix + items: + items: + - description: offset + - description: size + description: + Boot partition use a different layout where the 4 bytes of spare + data are not protected by ECC. Use this to declare these special + partitions by defining first the offset and then the size. + + It's in the form of <offset1 size1 offset2 size2 offset3 ...> + and should be declared in ascending order. + + Refer to the ipq8064 example on how to use this special binding. + required: - compatible - reg @@ -135,6 +160,8 @@ examples: nand-ecc-strength = <4>; nand-bus-width = <8>; + qcom,boot-partitions = <0x0 0x58a0000>; + partitions { compatible = "fixed-partitions"; #address-cells = <1>;