target/linux/bcm27xx/patches-6.1/950-0926-dt-bindings-update-rpi-rtc-binding.patch

   1 From a7a3679a148e40879f1ce77580d9edf64cb5b51c Mon Sep 17 00:00:00 2001
   2 From: Jonathan Bell <jonathan@raspberrypi.com>
   3 Date: Mon, 18 Sep 2023 16:33:06 +0100
   4 Subject: [PATCH] dt: bindings: update rpi-rtc binding
   5
   6 Add property for bcm2712 firmware RTC driver charger control
   7
   8 Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
   9 ---
  10  Documentation/devicetree/bindings/rtc/rtc-rpi.txt | 5 +++++
  11  1 file changed, 5 insertions(+)
  12
  13 --- a/Documentation/devicetree/bindings/rtc/rtc-rpi.txt
  14 +++ b/Documentation/devicetree/bindings/rtc/rtc-rpi.txt
  15 @@ -9,9 +9,14 @@ Required properties:
  16  compatible: should be "raspberrypi,rpi-rtc"
  17  firmware:   Reference to the RPi firmware device node.
  18
  19 +Optional property:
  20 +trickle-charge-microvolt: specify a trickle charge voltage for the backup
  21 +                          battery in microvolts.
  22 +
  23  Example:
  24
  25         rpi_rtc: rpi_rtc {
  26                 compatible = "raspberrypi,rpi-rtc";
  27                 firmware = <&firmware>;
  28 +               trickle-charge-microvolt = <3000000>;
  29         };