From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- .../testing/sysfs-class-rtc-rtc0-device-rtc_calibration | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-rtc-rtc0-device-rtc_calibration (limited to 'Documentation/ABI/testing/sysfs-class-rtc-rtc0-device-rtc_calibration') diff --git a/Documentation/ABI/testing/sysfs-class-rtc-rtc0-device-rtc_calibration b/Documentation/ABI/testing/sysfs-class-rtc-rtc0-device-rtc_calibration new file mode 100644 index 000000000..ee8ed6494 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-rtc-rtc0-device-rtc_calibration @@ -0,0 +1,14 @@ +What: /sys/class/rtc/rtc0/device/rtc_calibration +Date: Oct 2011 +KernelVersion: 3.0 +Contact: Mark Godfrey +Description: Attribute for calibrating ST-Ericsson AB8500 Real Time Clock + The rtc_calibration attribute allows the userspace to + calibrate the AB8500.s 32KHz Real Time Clock. + Every 60 seconds the AB8500 will correct the RTC's value + by adding to it the value of this attribute. + + The range of the attribute is -127 to +127 in units of + 30.5 micro-seconds (half-parts-per-million of the 32KHz clock) +Users: The /vendor/st-ericsson/base_utilities/core/rtc_calibration + daemon uses this interface. -- cgit v1.2.3