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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/rtc/dallas,ds1307.rst | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/rtc/dallas,ds1307.rst b/Documentation/devicetree/bindings/rtc/dallas,ds1307.rst new file mode 100644 index 0000000000..602f74b4dc --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/dallas,ds1307.rst @@ -0,0 +1,33 @@ +Dallas DS1307 I2C Serial Real-Time Clock +======================================== + +Required properties: +* ``compatible``: ``dallas,ds1307``, ``dallas,ds1308``, ``dallas,ds1338`` + "maxim" can be used in place of "dallas" + +* ``reg``: I2C address for chip + +Optional properties: +* ``ext-clock-input``: Enable external clock input pin +* ``ext-clock-output``: Enable square wave output. The above two + properties are mutually exclusive +* ``ext-clock-bb``: Enable external clock on battery power +* ``ext-clock-rate``: Expected/Generated rate on external clock pin + in Hz. Allowable values are 1, 50, 60, 4096, 8192, and 32768 Hz. + Not all values are valid for all configurations. + +The default is ext-clock-input, ext-clock-output, and ext-clock-bb +disabled and ext-clock-rate of 1 Hz. + +Example:: + ds1307: rtc@68 { + compatible = "dallas,ds1307"; + reg = <0x68>; + }; + + ds1308: rtc@68 { + compatible = "maxim,ds1308"; + reg = <0x68>; + ext-clock-output; + ext-clock-rate = <32768>; + }; |