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-rw-r--r--Documentation/core-api/printk-formats.rst7
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/core-api/printk-formats.rst b/Documentation/core-api/printk-formats.rst
index 385c0cc52f1f..4346ae17a72c 100644
--- a/Documentation/core-api/printk-formats.rst
+++ b/Documentation/core-api/printk-formats.rst
@@ -513,9 +513,10 @@ Time and date
 ::
 
 	%pt[RT]			YYYY-mm-ddTHH:MM:SS
+	%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]
+	%pt[RT][dt][r][s]
 
 For printing date and time as represented by::
 
@@ -527,6 +528,10 @@ in human readable format.
 By default year will be incremented by 1900 and month by 1.
 Use %pt[RT]r (raw) to suppress this behaviour.
 
+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.
+
 Passed by reference.
 
 struct clk