| Message ID | 20220518184256.21238-3-ansuelsmth@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support for unprotected spare data page | expand |
On Wed, May 18, 2022 at 08:42:56PM +0200, Ansuel Smith wrote: > Document new qcom,boot-pages binding used to apply special > read/write configuration to boot pages. > > QCOM apply a special configuration 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> > --- > .../devicetree/bindings/mtd/qcom,nandc.yaml | 26 +++++++++++++++++++ > 1 file changed, 26 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml > index 84ad7ff30121..3b8244db2ae8 100644 > --- a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml > +++ b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml > @@ -102,6 +102,30 @@ allOf: > - const: rx > - const: cmd > > + - if: > + properties: > + compatible: > + contains: > + enum: > + - qcom,ipq8074-nand Ignore this revision, this is wrong since this should be ipq8064... Will resend tomorrow v4 with this fixed. > + > + then: > + properties: > + qcom,boot-pages: > + $ref: /schemas/types.yaml#/definitions/uint32-matrix > + items: > + items: > + - description: offset > + - description: size > + description: > + Some special page used by boot partition have spare data > + not protected by ECC. Use this to declare these special page > + by defining first the offset and then the size. > + > + It's in the form of <offset1 size1 offset2 size2 offset3 ...> > + > + Refer to the ipq8064 example on how to use this special binding. > + > required: > - compatible > - reg > @@ -135,6 +159,8 @@ examples: > nand-ecc-strength = <4>; > nand-bus-width = <8>; > > + qcom,boot-pages = <0x0 0x58a0000>; > + > partitions { > compatible = "fixed-partitions"; > #address-cells = <1>; > -- > 2.34.1 >
diff --git a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml index 84ad7ff30121..3b8244db2ae8 100644 --- a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml +++ b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml @@ -102,6 +102,30 @@ allOf: - const: rx - const: cmd + - if: + properties: + compatible: + contains: + enum: + - qcom,ipq8074-nand + + then: + properties: + qcom,boot-pages: + $ref: /schemas/types.yaml#/definitions/uint32-matrix + items: + items: + - description: offset + - description: size + description: + Some special page used by boot partition have spare data + not protected by ECC. Use this to declare these special page + by defining first the offset and then the size. + + It's in the form of <offset1 size1 offset2 size2 offset3 ...> + + Refer to the ipq8064 example on how to use this special binding. + required: - compatible - reg @@ -135,6 +159,8 @@ examples: nand-ecc-strength = <4>; nand-bus-width = <8>; + qcom,boot-pages = <0x0 0x58a0000>; + partitions { compatible = "fixed-partitions"; #address-cells = <1>;
Document new qcom,boot-pages binding used to apply special read/write configuration to boot pages. QCOM apply a special configuration 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> --- .../devicetree/bindings/mtd/qcom,nandc.yaml | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+)