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linux-imx/Documentation/ABI/testing/sysfs-class-spi-eeprom
Jiri Prchal fd307a4ad3 nvmem: prepare basics for FRAM support 
Added enum and string for FRAM (ferroelectric RAM) to expose it as file
named "fram".
Added documentation of sysfs file.

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
Link: https://lore.kernel.org/r/20210611094601.95131-2-jiri.prchal@aksignal.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-11 12:23:10 +02:00

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What: /sys/class/spi_master/spi/spi./fram Date: June 2021 KernelVersion: 5.14 Contact: Jiri Prchal jiri.prchal@aksignal.cz Description: Contains the FRAM binary data. Same as EEPROM, just another file name to indicate that it employs ferroelectric process. It performs write operations at bus speed - no write delays.

What: /sys/class/spi_master/spi/spi./sernum Date: May 2021 KernelVersion: 5.14 Contact: Jiri Prchal jiri.prchal@aksignal.cz Description: Contains the serial number of the Cypress FRAM (FM25VN) if it is present. It will be displayed as a 8 byte hex string, as read from the device.

This is a read-only attribute.