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-rw-r--r--dts/Bindings/mtd/mtd-physmap.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/dts/Bindings/mtd/mtd-physmap.txt b/dts/Bindings/mtd/mtd-physmap.txt
index 6b9f680cb5..4a0a48bf4e 100644
--- a/dts/Bindings/mtd/mtd-physmap.txt
+++ b/dts/Bindings/mtd/mtd-physmap.txt
@@ -36,6 +36,11 @@ are defined:
- vendor-id : Contains the flash chip's vendor id (1 byte).
- device-id : Contains the flash chip's device id (1 byte).
+For ROM compatible devices (and ROM fallback from cfi-flash), the following
+additional (optional) property is defined:
+
+ - erase-size : The chip's physical erase block size in bytes.
+
The device tree may optionally contain sub-nodes describing partitions of the
address space. See partition.txt for more detail.