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authorLinus Torvalds <torvalds@linux-foundation.org>2019-01-02 00:24:31 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-02 00:24:31 +0300
commit28e8c4bc8eb483c22d977e147a0b98fc63efadf7 (patch)
tree8006dd759601c70d4dd1fc644ed817e9597cec55 /Documentation/core-api
parentc9bef4a651769927445900564781a9c99fdf6258 (diff)
parent36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62 (diff)
downloadlinux-28e8c4bc8eb483c22d977e147a0b98fc63efadf7.tar.xz
Merge tag 'rtc-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni: "Subsystem: - new %ptR printk format - rename core files - allow registration of multiple nvmem devices New driver: - i.MX system controller RTC Driver updates: - abx80x: handle voltage ioctls, correct binding doc - m41t80: correct month in alarm reads - pcf85363: add pcf85263 support - pcf8523: properly handle battery low flag - s3c: limit alarm to one year in the future as ALMYEAR is broken - sun6i: rework clock output binding" * tag 'rtc-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (54 commits) rtc: rename core files rtc: nvmem: fix possible use after free rtc: add i.MX system controller RTC support dt-bindings: fsl: scu: add rtc binding rtc: pcf2123: Add Microcrystal rv2123 rtc: class: reimplement devm_rtc_device_register rtc: enforce rtc_timer_init private_data type rtc: abx80x: Implement RTC_VL_READ,CLR ioctls rtc: pcf85363: Add support for NXP pcf85263 rtc dt-bindings: rtc: pcf85363: Document pcf85263 real-time clock rtc: pcf8523: don't return invalid date when battery is low dt-bindings: rtc: use a generic node name for ds1307 PM: Switch to use %ptR m68k/mac: Switch to use %ptR Input: hp_sdc_rtc - Switch to use %ptR rtc: tegra: Switch to use %ptR rtc: s5m: Switch to use %ptR rtc: s3c: Switch to use %ptR rtc: rx8025: Switch to use %ptR rtc: rx6110: Switch to use %ptR ...
Diffstat (limited to 'Documentation/core-api')
-rw-r--r--Documentation/core-api/printk-formats.rst18
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
----------