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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-10-17 14:46:11 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2015-08-26 15:14:00 +0200 |
| commit | 3e1adbf832b8f420906e6d5cbf5bec7617545c7e (patch) | |
| tree | 28f7de3e43ee9021c312e05209e8b1b060b86a60 /Documentation/devicetree | |
| parent | f38ba32965c5686c062884fab2e9f505015af82a (diff) | |
| download | barebox-3e1adbf832b8f420906e6d5cbf5bec7617545c7e.tar.gz barebox-3e1adbf832b8f420906e6d5cbf5bec7617545c7e.tar.xz | |
mtd: m25p80: make it possible to use large blocks if desired
Some SPI NOR flashes support 4K erase blocks. 4K erase blocks do not
work with UBIFS which needs a minimum erase block size of 15360 bytes.
Also bigger sectors are faster to erase. This patch adds a device tree
option to use the bigger blocks instead of the default 4K blocks.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/m25p80.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mtd/m25p80.rst b/Documentation/devicetree/bindings/mtd/m25p80.rst new file mode 100644 index 0000000000..d7c8914ec5 --- /dev/null +++ b/Documentation/devicetree/bindings/mtd/m25p80.rst @@ -0,0 +1,10 @@ +MTD SPI driver for ST M25Pxx (and similar) serial flash chips +============================================================= + +Additionally to the Linux bindings in ``dts/Bindings/mtd/m25p80.txt`` +the barebox driver has the following optional properties: + +- use-large-blocks : Use large blocks rather than the 4K blocks some devices + support. 4K erase blocks do not work with UBIFS which needs + a minimum erase block size of 15360 bytes. Also bigger sectors + are faster to erase. |