[PATCH v13 07/20] dt-bindings: mtd: Document boolean NAND ECC properties

Miquel Raynal miquel.raynal at bootlin.com
Thu Aug 27 04:51:55 EDT 2020

Document nand-use-soft-ecc-engine and nand-no-ecc-engine properties.
The former is here to force software correction, the latter prevents
any correction to happen.

These properties (along with nand-ecc-engine) are supposed to be more
accurate than the current nand-ecc-modes wich is very misleading and
very often people think it is mandatory while the core should be
relied upon to decide which correction to handle.

nand-ecc-mode was already inacurate, but it becomes totally
problematic with setups where there are several hardware engines.

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
Reviewed-by: Rob Herring <robh at kernel.org>
 .../devicetree/bindings/mtd/nand-controller.yaml          | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/nand-controller.yaml b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
index ba7f8e4db5a5..e79bb6d2c108 100644
--- a/Documentation/devicetree/bindings/mtd/nand-controller.yaml
+++ b/Documentation/devicetree/bindings/mtd/nand-controller.yaml
@@ -68,6 +68,14 @@ patternProperties:
           3/ The ECC engine is external, in this case the phandle should
           reference the specific ECC engine node.
+      nand-use-soft-ecc-engine:
+        type: boolean
+        description: Use a software ECC engine.
+      nand-no-ecc-engine:
+        type: boolean
+        description: Do not use any ECC correction.
           - $ref: /schemas/types.yaml#/definitions/string

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