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author | Akinobu Mita <akinobu.mita@gmail.com> | 2016-01-31 23:10:10 +0900 |
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committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2016-03-14 17:08:13 +0100 |
commit | 6c6ff145b3346b071e7d80f9bd33aa7de0e438bc (patch) | |
tree | bdd4e8997f5b9c64ec1d00d219e0d18cd27999d8 /Documentation | |
parent | f3937549a975fadec9b517b059616f08f9cb7653 (diff) | |
download | linux-6c6ff145b3346b071e7d80f9bd33aa7de0e438bc.tar.bz2 |
rtc: ds1307: add clock provider support for DS3231
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>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/rtc/maxim,ds3231.txt | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/rtc/maxim,ds3231.txt b/Documentation/devicetree/bindings/rtc/maxim,ds3231.txt new file mode 100644 index 000000000000..ddef330d2709 --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/maxim,ds3231.txt @@ -0,0 +1,37 @@ +* Maxim DS3231 Real Time Clock + +Required properties: +see: Documentation/devicetree/bindings/i2c/trivial-devices.txt + +Optional property: +- #clock-cells: Should be 1. +- clock-output-names: + overwrite the default clock names "ds3231_clk_sqw" and "ds3231_clk_32khz". + +Each clock is assigned an identifier and client nodes can use this identifier +to specify the clock which they consume. Following indices are allowed: + - 0: square-wave output on the SQW pin + - 1: square-wave output on the 32kHz pin + +- interrupts: rtc alarm/event interrupt. When this property is selected, + clock on the SQW pin cannot be used. + +Example: + +ds3231: ds3231@51 { + compatible = "maxim,ds3231"; + reg = <0x68>; + #clock-cells = <1>; +}; + +device1 { +... + clocks = <&ds3231 0>; +... +}; + +device2 { +... + clocks = <&ds3231 1>; +... +}; |