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1What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/fram2Date: June 20213KernelVersion: 5.144Contact: Jiri Prchal <jiri.prchal@aksignal.cz>5Description:6 Contains the FRAM binary data. Same as EEPROM, just another file7 name to indicate that it employs ferroelectric process.8 It performs write operations at bus speed - no write delays.9 10What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/sernum11Date: May 202112KernelVersion: 5.1413Contact: Jiri Prchal <jiri.prchal@aksignal.cz>14Description:15 Contains the serial number of the Cypress FRAM (FM25VN) if it is16 present. It will be displayed as a 8 byte hex string, as read17 from the device.18 19 This is a read-only attribute.20