From: Ansuel Smith <ansuelsmth@gmail.com>
To: Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Manivannan Sadhasivam <mani@kernel.org>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-mtd@lists.infradead.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Ansuel Smith <ansuelsmth@gmail.com>
Subject: [PATCH v2 2/2] dt-bindings: mtd: qcom_nandc: document qcom,boot-pages binding
Date: Tue, 3 May 2022 17:43:53 +0200 [thread overview]
Message-ID: <20220503154353.4367-3-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20220503154353.4367-1-ansuelsmth@gmail.com>
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 | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
index 84ad7ff30121..fafeca0cafff 100644
--- a/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
+++ b/Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
@@ -102,6 +102,26 @@ 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
+ 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 +155,8 @@ examples:
nand-ecc-strength = <4>;
nand-bus-width = <8>;
+ qcom,boot-pages = <0x0 0x58a0000>;
+
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
--
2.34.1
next prev parent reply other threads:[~2022-05-03 15:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-03 15:43 [PATCH v2 0/2] Add support for unprotected spare data page Ansuel Smith
2022-05-03 15:43 ` [PATCH v2 1/2] mtd: nand: raw: qcom_nandc: add support for unprotected spare data pages Ansuel Smith
2022-05-03 15:43 ` Ansuel Smith [this message]
2022-05-16 18:49 ` [PATCH v2 2/2] dt-bindings: mtd: qcom_nandc: document qcom,boot-pages binding Rob Herring
2022-05-17 20:56 ` Ansuel Smith
2022-05-18 18:11 ` Rob Herring
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