dt-bindings: qcom_nandc: update for ECC strength and step size

1. If nand-ecc-strength specified in DT, then controller will use
   this ECC strength otherwise ECC strength will be calculated
   according to chip requirement and available OOB size.

2. QCOM NAND controller supports only one step size (512 bytes) but
   nand-ecc-step-size is required property in DT. This DT property
   can be removed and ecc step size can be assigned in driver with
   512 bytes value.

Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

diff --git a/Documentation/devicetree/bindings/mtd/qcom_nandc.txt b/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
index 73d336befa081b95fb96d8e33863bb6c602fcca9..1123cc6d56ef3d52bfa9dd455b1981600872dfc3 100644 (file)
--- a/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
+++ b/Documentation/devicetree/bindings/mtd/qcom_nandc.txt
@@ -45,11 +45,12 @@ Required properties:
                        number (e.g., 0, 1, 2, etc.)
 - #address-cells:      see partition.txt
 - #size-cells:         see partition.txt
-- nand-ecc-strength:   see nand.txt
-- nand-ecc-step-size:  must be 512. see nand.txt for more details.
 
 Optional properties:
 - nand-bus-width:      see nand.txt
+- nand-ecc-strength:   see nand.txt. If not specified, then ECC strength will
+                       be used according to chip requirement and available
+                       OOB size.
 
 Each nandcs device node may optionally contain a 'partitions' sub-node, which
 further contains sub-nodes describing the flash partition mapping. See
@@ -77,7 +78,6 @@ nand-controller@1ac00000 {
                reg = <0>;
 
                nand-ecc-strength = <4>;
-               nand-ecc-step-size = <512>;
                nand-bus-width = <8>;
 
                partitions {
@@ -117,7 +117,6 @@ nand-controller@79b0000 {
        nand@0 {
                reg = <0>;
                nand-ecc-strength = <4>;
-               nand-ecc-step-size = <512>;
                nand-bus-width = <8>;
 
                partitions {