Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / mtd / jedec,spi-nor.txt

diff --git a/kernel/Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt b/kernel/Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt
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+* MTD SPI driver for ST M25Pxx (and similar) serial flash chips
+
+Required properties:
+- #address-cells, #size-cells : Must be present if the device has sub-nodes
+  representing partitions.
+- compatible : May include a device-specific string consisting of the
+               manufacturer and name of the chip. Bear in mind the DT binding
+               is not Linux-only, but in case of Linux, see the "m25p_ids"
+               table in drivers/mtd/devices/m25p80.c for the list of supported
+               chips.
+               Must also include "jedec,spi-nor" for any SPI NOR flash that can
+               be identified by the JEDEC READ ID opcode (0x9F).
+- reg : Chip-Select number
+- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
+
+Optional properties:
+- m25p,fast-read : Use the "fast read" opcode to read data from the chip instead
+                   of the usual "read" opcode. This opcode is not supported by
+                   all chips and support for it can not be detected at runtime.
+                   Refer to your chips' datasheet to check if this is supported
+                   by your chip.
+
+Example:
+
+       flash: m25p80@0 {
+               #address-cells = <1>;
+               #size-cells = <1>;
+               compatible = "spansion,m25p80", "jedec,spi-nor";
+               reg = <0>;
+               spi-max-frequency = <40000000>;
+               m25p,fast-read;
+       };