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DS3231 has programmable square-wave output signal. This enables to use this feature as a clock provider of common clock framework. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Reviewed-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
38 lines
806 B
Plaintext
38 lines
806 B
Plaintext
* Maxim DS3231 Real Time Clock
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Required properties:
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see: Documentation/devicetree/bindings/i2c/trivial-devices.txt
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Optional property:
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- #clock-cells: Should be 1.
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- clock-output-names:
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overwrite the default clock names "ds3231_clk_sqw" and "ds3231_clk_32khz".
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Each clock is assigned an identifier and client nodes can use this identifier
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to specify the clock which they consume. Following indices are allowed:
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- 0: square-wave output on the SQW pin
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- 1: square-wave output on the 32kHz pin
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- interrupts: rtc alarm/event interrupt. When this property is selected,
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clock on the SQW pin cannot be used.
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Example:
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ds3231: ds3231@51 {
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compatible = "maxim,ds3231";
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reg = <0x68>;
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#clock-cells = <1>;
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};
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device1 {
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...
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clocks = <&ds3231 0>;
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...
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};
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device2 {
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...
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clocks = <&ds3231 1>;
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...
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};
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