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lib/vsprintf: Print time and date in human readable format via %pt

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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>
This commit is contained in:
Andy Shevchenko 2018-12-04 23:23:11 +02:00 • committed by Alexandre Belloni
parent 8c4cf161a8
commit 4d42c44727
3 changed files with 176 additions and 3 deletions
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18
Documentation/core-api/printk-formats.rst
View file

@ -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
----------