5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
15 lines
763 B
Plaintext
15 lines
763 B
Plaintext
What: /sys/class/rtc/rtc0/device/rtc_calibration
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Date: Oct 2011
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KernelVersion: 3.0
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Contact: Mark Godfrey <mark.godfrey@stericsson.com>
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Description: Attribute for calibrating ST-Ericsson AB8500 Real Time Clock
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The rtc_calibration attribute allows the userspace to
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calibrate the AB8500.s 32KHz Real Time Clock.
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Every 60 seconds the AB8500 will correct the RTC's value
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by adding to it the value of this attribute.
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The range of the attribute is -127 to +127 in units of
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30.5 micro-seconds (half-parts-per-million of the 32KHz clock)
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Users: The /vendor/st-ericsson/base_utilities/core/rtc_calibration
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daemon uses this interface.
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