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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2017-07-06 11:42:02 +0200
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2017-07-07 13:14:14 +0200
commit697e5a47aa12cdab6f2a8b284cc923cdf704eafc (patch)
tree3c2a9a02d436c6499896b7c9800a91c2e8185891 /Documentation/rtc.txt
parent735ae2056b3c7296bb188d079c020f606a679c4a (diff)
downloadlinux-697e5a47aa12cdab6f2a8b284cc923cdf704eafc.tar.bz2
rtc: add generic nvmem support
Many RTCs have an on board non volatile storage. It can be battery backed RAM or an EEPROM. Use the nvmem subsystem to export it to both userspace and in-kernel consumers. This stays compatible with the previous (non documented) ABI that was using /sys/class/rtc/rtcx/device/nvram to export that memory. But will warn about the deprecation. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'Documentation/rtc.txt')
-rw-r--r--Documentation/rtc.txt2
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/rtc.txt b/Documentation/rtc.txt
index 47feb4414b7e..c0c977445fb9 100644
--- a/Documentation/rtc.txt
+++ b/Documentation/rtc.txt
@@ -164,6 +164,8 @@ offset The amount which the rtc clock has been adjusted in firmware.
which are added to or removed from the rtc's base clock per
billion ticks. A positive value makes a day pass more slowly,
longer, and a negative value makes a day pass more quickly.
+*/nvmem The non volatile storage exported as a raw file, as described
+ in Documentation/nvmem/nvmem.txt
================ ==============================================================
IOCTL interface