| What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/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<bus>/spi<bus>.<dev>/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. |
| |
| What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/jedec_id |
| Date: January 2026 |
| KernelVersion: 6.19 |
| Contact: Patrick Wicki <patrick.wicki@siemens.com> |
| Description: |
| Contains the raw JEDEC ID bytes returned by the RDID (0x9f) command. The |
| bytes are exposed as a hex string in big-endian order as read from the |
| device. |
| |
| This is a read-only attribute. |
