From ff2c2f67689e10ad66c1e33ae6a7552d82ac983c Mon Sep 17 00:00:00 2001 From: Dom Cobley Date: Fri, 7 Jul 2023 20:16:06 +0100 Subject: [PATCH] dt-bindings: rtc: new binding for Raspberry Pi RTC driver Add binding for the new RTC driver for Raspberry Pi. This platform has an RTC managed by firmware, and this RTC driver provides the simple mailbox interface to access it. Signed-off-by: Dom Cobley --- .../devicetree/bindings/rtc/rtc-rpi.txt | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/rtc-rpi.txt --- /dev/null +++ b/Documentation/devicetree/bindings/rtc/rtc-rpi.txt @@ -0,0 +1,17 @@ +* Raspberry Pi RTC + +This is a Linux interface to an RTC managed by firmware, hence it's +virtual from a Linux perspective. + +The interface uses the firmware mailbox api to access the RTC registers. + +Required properties: +compatible: should be "raspberrypi,rpi-rtc" +firmware: Reference to the RPi firmware device node. + +Example: + + rpi_rtc: rpi_rtc { + compatible = "raspberrypi,rpi-rtc"; + firmware = <&firmware>; + };