diff mbox series

[v8,3/3] dt-bindings: mtd: qcom_nandc: document qcom,boot-partitions binding

Message ID 20220616001835.24393-4-ansuelsmth@gmail.com (mailing list archive)
State Not Applicable
Headers show
Series Add support for unprotected spare data page | expand

Commit Message

Christian Marangi June 16, 2022, 12:18 a.m. UTC
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>
---
 .../devicetree/bindings/mtd/qcom,nandc.yaml   | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

Comments

Rob Herring June 16, 2022, 3:41 p.m. UTC | #1
On Thu, 16 Jun 2022 02:18:35 +0200, Christian Marangi 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: Christian Marangi <ansuelsmth@gmail.com>
> ---
>  .../devicetree/bindings/mtd/qcom,nandc.yaml   | 27 +++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
Manivannan Sadhasivam June 16, 2022, 8:30 p.m. UTC | #2
On Thu, Jun 16, 2022 at 02:18:35AM +0200, Christian Marangi 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: Christian Marangi <ansuelsmth@gmail.com>
> ---

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>

Thanks,
Mani

>  .../devicetree/bindings/mtd/qcom,nandc.yaml   | 27 +++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> 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>;
> -- 
> 2.36.1
>
Miquel Raynal June 17, 2022, 6:31 a.m. UTC | #3
On Thu, 2022-06-16 at 00:18:35 UTC, Christian Marangi 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: Christian Marangi <ansuelsmth@gmail.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel
diff mbox series

Patch

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>;