[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <62709b53-392f-2463-8124-e109f2d810dd@linaro.org>
Date: Sat, 30 Apr 2022 16:43:20 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Ansuel Smith <ansuelsmth@...il.com>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Manivannan Sadhasivam <mani@...nel.org>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
Vignesh Raghavendra <vigneshr@...com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
linux-arm-msm@...r.kernel.org, linux-mtd@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: mtd: qcom_nandc: document
qcom,boot_pages binding
On 29/04/2022 23:16, 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@...il.com>
> ---
> .../devicetree/bindings/mtd/qcom,nandc.yaml | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
> index 84ad7ff30121..ef243109689d 100644
> --- a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
> +++ b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
> @@ -78,6 +78,17 @@ allOf:
> Must contain the ADM data type CRCI block instance number
> specified for the NAND controller on the given platform
>
> + qcom,boot_pages:
No underscores in property names.
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + 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 ...>
Then it look like uint32-matrix.
> +
> + Refer to the ipq8064 example on how to use this special binding.
Property does not look valid for other variants, so it should be made
false for them (in allOf:if:then).
> +
> - if:
> properties:
> compatible:
> @@ -135,6 +146,8 @@ examples:
> nand-ecc-strength = <4>;
> nand-bus-width = <8>;
>
> + qcom,boot_pages = <0x0 0x58a0000>;
> +
> partitions {
> compatible = "fixed-partitions";
> #address-cells = <1>;
Best regards,
Krzysztof
Powered by blists - more mailing lists