diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2025-11-13 15:32:15 +0100 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2025-11-19 10:24:13 +0100 |
| commit | bccd5937447f8a2c9db0e4a92e5ecb641b8ce7de (patch) | |
| tree | 7ed133a34ed57374e9412f432fc66dfc350d3f2f /Documentation | |
| parent | 48e3694ae7fae347c1193c84f384f4ea41086075 (diff) | |
lib/vsprintf: Add specifier for printing struct timespec64
A handful drivers want to print a content of the struct timespec64
in a format of %lld:%09ld. In order to make their lives easier, add
the respecting specifier directly to the printf() implementation.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Tested-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/20251113150217.3030010-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/core-api/printk-formats.rst | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst index 7f2f11b48286..c0b1b6089307 100644 --- a/Documentation/core-api/printk-formats.rst +++ b/Documentation/core-api/printk-formats.rst @@ -547,11 +547,13 @@ Time and date %pt[RT]s YYYY-mm-dd HH:MM:SS %pt[RT]d YYYY-mm-dd %pt[RT]t HH:MM:SS - %pt[RT][dt][r][s] + %ptSp <seconds>.<nanoseconds> + %pt[RST][dt][r][s] For printing date and time as represented by:: - R struct rtc_time structure + R content of struct rtc_time + S content of struct timespec64 T time64_t type in human readable format. @@ -563,6 +565,11 @@ The %pt[RT]s (space) will override ISO 8601 separator by using ' ' (space) instead of 'T' (Capital T) between date and time. It won't have any effect when date or time is omitted. +The %ptSp is equivalent to %lld.%09ld for the content of the struct timespec64. +When the other specifiers are given, it becomes the respective equivalent of +%ptT[dt][r][s].%09ld. In other words, the seconds are being printed in +the human readable format followed by a dot and nanoseconds. + Passed by reference. struct clk |