git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From 8649c7deae7ed7a33ef6ba630d9df2e23d1ca24f Mon Sep 17 00:00:00 2001
   2 From: Dom Cobley <popcornmix@gmail.com>
   3 Date: Fri, 7 Jul 2023 20:16:06 +0100
   4 Subject: [PATCH 0570/1085] dt-bindings: rtc: new binding for Raspberry Pi RTC
   5  driver
   6
   7 Add binding for the new RTC driver for Raspberry Pi.
   8 This platform has an RTC managed by firmware, and this RTC
   9 driver provides the simple mailbox interface to access it.
  10
  11 Signed-off-by: Dom Cobley <popcornmix@gmail.com>
  12 ---
  13  .../devicetree/bindings/rtc/rtc-rpi.txt         | 17 +++++++++++++++++
  14  1 file changed, 17 insertions(+)
  15  create mode 100644 Documentation/devicetree/bindings/rtc/rtc-rpi.txt
  16
  17 --- /dev/null
  18 +++ b/Documentation/devicetree/bindings/rtc/rtc-rpi.txt
  19 @@ -0,0 +1,17 @@
  20 +* Raspberry Pi RTC
  21 +
  22 +This is a Linux interface to an RTC managed by firmware, hence it's
  23 +virtual from a Linux perspective.
  24 +
  25 +The interface uses the firmware mailbox api to access the RTC registers.
  26 +
  27 +Required properties:
  28 +compatible: should be "raspberrypi,rpi-rtc"
  29 +firmware:   Reference to the RPi firmware device node.
  30 +
  31 +Example:
  32 +
  33 +       rpi_rtc: rpi_rtc {
  34 +               compatible = "raspberrypi,rpi-rtc";
  35 +               firmware = <&firmware>;
  36 +       };