lkml.org 
[lkml]   [2021]   [Jun]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v9 5/5] nvmem: eeprom: add documentation of sysfs fram and sernum file
Date
Added sysfs fram and sernum file documentation.

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
---
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@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>/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, capable
+ of 10^14 read/write cycles and 151 years data retention.
--
2.25.1
\
 
 \ /
  Last update: 2021-06-11 07:28    [W:0.071 / U:1.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site