diff options
author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2018-12-05 00:23:11 +0300 |
---|---|---|
committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2018-12-11 00:39:34 +0300 |
commit | 4d42c44727a062e233e446c6c86da1c84d762d79 (patch) | |
tree | b4992b55032b1f92172d8a09b9d515531e0933fb /Documentation | |
parent | 8c4cf161a8b42749e986a3503f6cd4f3b5682fe3 (diff) | |
download | linux-4d42c44727a062e233e446c6c86da1c84d762d79.tar.xz |
lib/vsprintf: Print time and date in human readable format via %pt
There are users which print time and date represented by content of
struct rtc_time in human readable format.
Instead of open coding that each time introduce %ptR[dt][r] specifier.
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/core-api/printk-formats.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index ff48b55040ef..a7fae4538946 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -412,6 +412,24 @@ Examples:: Passed by reference. +Time and date (struct rtc_time) +------------------------------- + +:: + + %ptR YYYY-mm-ddTHH:MM:SS + %ptRd YYYY-mm-dd + %ptRt HH:MM:SS + %ptR[dt][r] + +For printing date and time as represented by struct rtc_time structure in +human readable format. + +By default year will be incremented by 1900 and month by 1. Use %ptRr (raw) +to suppress this behaviour. + +Passed by reference. + struct clk ---------- |