[PATCH v3 4/9] of: mtd: add documentation for the ONFI NAND timing mode property

Boris BREZILLON
2014-03-12T18:07:39Z

Add documentation for the ONFI NAND timing mode property.

Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
---
Documentation/devicetree/bindings/mtd/nand.txt | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/mtd/nand.txt b/Documentation/devicetree/bindings/mtd/nand.txt
index b53f92e..2046027 100644
--- a/Documentation/devicetree/bindings/mtd/nand.txt
+++ b/Documentation/devicetree/bindings/mtd/nand.txt
@@ -19,3 +19,11 @@ errors per {size} bytes".
The interpretation of these parameters is implementation-defined, so not all
implementations must support all possible combinations. However, implementations
are encouraged to further specify the value(s) they support.
+
+- onfi,nand-timing-mode: an integer encoding the supported ONFI timing modes of
+ the NAND chip. Each supported mode is represented as a bit position (i.e. :
+ mode 0 and 1 => (1 << 0) | (1 << 1) = 0x3).
+ This is only used when the chip does not support the ONFI standard.
+ The last bit set represent the closest mode fulfilling the NAND chip timings.
+ For a full description of the different timing modes see this document:
+ www.onfi.org/~/media/ONFI/specs/onfi_3_1_spec.pdf
--
1.7.9.5