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| author | Christian Marangi <ansuelsmth@gmail.com> | 2022-06-16 03:18:35 +0300 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2022-06-17 09:30:21 +0300 |
| commit | 5278cc93a97f7b7b9e69632e52503e956153d944 (patch) | |
| tree | 51b6c6bd77245546de2c3b263a4e27cfe34ae938 /Documentation/devicetree/bindings/mtd | |
| parent | 862bdedd7f4b8aebf00fdb422062e64896e97809 (diff) | |
| download | linux-5278cc93a97f7b7b9e69632e52503e956153d944.tar.xz | |
dt-bindings: mtd: qcom_nandc: document qcom,boot-partitions binding
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: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220616001835.24393-4-ansuelsmth@gmail.com
Diffstat (limited to 'Documentation/devicetree/bindings/mtd')
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/qcom,nandc.yaml | 27 |
1 files changed, 27 insertions, 0 deletions
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>; |