Added sysfs fram and sernum file documentation. Signed-off-by: Jiri Prchal <jiri.prchal@xxxxxxxxxxx> --- v5: new v6: no change here v7: no change here v8: added fram file doc v9: rewritten description --- .../ABI/testing/sysfs-class-spi-eeprom | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-spi-eeprom diff --git a/Documentation/ABI/testing/sysfs-class-spi-eeprom b/Documentation/ABI/testing/sysfs-class-spi-eeprom new file mode 100644 index 000000000000..4e69c78f9f65 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-spi-eeprom @@ -0,0 +1,20 @@ +What: /sys/class/spi_master/spi<bus>/spi<bus>.<dev>/sernum +Date: May 2021 +KernelVersion: 5.14 +Contact: Jiri Prchal <jiri.prchal@xxxxxxxxxxx> +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>/fram +Date: June 2021 +KernelVersion: 5.14 +Contact: Jiri Prchal <jiri.prchal@xxxxxxxxxxx> +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, capable + of 10^14 read/write cycles and 151 years data retention. -- 2.25.1
