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| author | Jiri Prchal <jiri.prchal@aksignal.cz> | 2021-06-11 11:45:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-11 12:23:10 +0200 |
| commit | fd307a4ad332ef50be5569c92490219e7cd84ce5 (patch) | |
| tree | 6683353455acad103535cdbceb9af084ff50531a /Documentation/ABI/testing/sysfs-class-spi-eeprom | |
| parent | nvmem: qfprom: Improve the comment about regulator setting (diff) | |
| download | linux-fd307a4ad332ef50be5569c92490219e7cd84ce5.tar.xz linux-fd307a4ad332ef50be5569c92490219e7cd84ce5.zip | |
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>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-spi-eeprom')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-spi-eeprom | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-spi-eeprom b/Documentation/ABI/testing/sysfs-class-spi-eeprom new file mode 100644 index 000000000000..1ff757982079 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-spi-eeprom @@ -0,0 +1,19 @@ +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. |