Messages in this thread Patch in this message | | | From | Flavio Suligoi <> | Subject | [PATCH 1/2] dt-bindings: rtc: add battery-low-hw-alarm property | Date | Wed, 3 Apr 2019 16:52:44 +0200 |
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Some RTC devices have a battery-low automatic detection circuit. The battery-low event is usually reported with:
- a bit change in a RTC status register - a hw signaling (generally using an interrupt generation), changing the hw level of a specific pin;
The new property "battery-low-hw-alarm" enable the RTC to generate the hw signaling in case of battery-low event.
Signed-off-by: Flavio Suligoi <f.suligoi@asem.it> --- Documentation/devicetree/bindings/rtc/rtc.txt | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/rtc/rtc.txt b/Documentation/devicetree/bindings/rtc/rtc.txt index a97fc6a..f93a44d 100644 --- a/Documentation/devicetree/bindings/rtc/rtc.txt +++ b/Documentation/devicetree/bindings/rtc/rtc.txt @@ -31,6 +31,9 @@ below. expressed in femto Farad (fF). The default value shall be listed (if optional), and likewise all valid values. +- battery-low-hw-alarm : Enable the "battery-low" output pin. This function + is available on the following devices: + - pcf2127 - pin used for alarm: INTn Trivial RTCs ------------ -- 2.7.4
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