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| author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-07-06 11:42:02 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2017-07-07 13:14:14 +0200 |
| commit | 697e5a47aa12cdab6f2a8b284cc923cdf704eafc (patch) | |
| tree | 3c2a9a02d436c6499896b7c9800a91c2e8185891 /Documentation/rtc.txt | |
| parent | 735ae2056b3c7296bb188d079c020f606a679c4a (diff) | |
| download | linux-697e5a47aa12cdab6f2a8b284cc923cdf704eafc.tar.gz linux-697e5a47aa12cdab6f2a8b284cc923cdf704eafc.tar.bz2 linux-697e5a47aa12cdab6f2a8b284cc923cdf704eafc.zip | |
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.txt | 2 |
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 |