- SPI NOR flash: 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. A list of supported chip names follows. Must also include "jedec,spi-nor" for any SPI NOR flash that can be identified by the JEDEC READ ID opcode (0x9F). Supported chip names: at25df321a at25df641 at26df081a mr25h128 mr25h256 mr25h10 mr25h40 mx25l4005a mx25l1606e mx25l6405d mx25l12805d mx25l25635e n25q064 n25q128a11 n25q128a13 n25q512a s25fl256s1 s25fl512s s25sl12801 s25fl008k s25fl064k sst25vf040b m25p40 m25p80 m25p16 m25p32 m25p64 m25p128 w25x80 w25x32 w25q32 w25q64 w25q32dw w25q80bl w25q128 w25q256 The following chip names have been used historically to designate quirky versions of flash chips that do not support the JEDEC READ ID opcode (0x9F): m25p05-nonjedec m25p10-nonjedec m25p20-nonjedec m25p40-nonjedec m25p80-nonjedec m25p16-nonjedec m25p32-nonjedec m25p64-nonjedec m25p128-nonjedecreg : 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;
};
