| * 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-nonjedec |
| |
| - 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. |
| - broken-flash-reset : Some flash devices utilize stateful addressing modes |
| (e.g., for 32-bit addressing) which need to be managed |
| carefully by a system. Because these sorts of flash don't |
| have a standardized software reset command, and because some |
| systems don't toggle the flash RESET# pin upon system reset |
| (if the pin even exists at all), there are systems which |
| cannot reboot properly if the flash is left in the "wrong" |
| state. This boolean flag can be used on such systems, to |
| denote the absence of a reliable reset mechanism. |
| |
| 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; |
| }; |
