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39 lines
1.6 KiB
Diff
39 lines
1.6 KiB
Diff
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From a7d602c262510352faff743e55373e77444cb57f Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Tue, 19 Dec 2023 14:55:21 +0000
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Subject: [PATCH 0805/1085] ARM: dts: bcm2712-rpi-5-b: Allow RTC to be disabled
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Add a dtparam "rtc", so that "dtparam=rtc=off" can be used to disable
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the Pi 5's onboard RTC.
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See: https://forums.raspberrypi.com/viewtopic.php?t=361813
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/broadcom/bcm2712-rpi-5-b.dts | 1 +
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arch/arm/boot/dts/overlays/README | 3 +++
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2 files changed, 4 insertions(+)
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--- a/arch/arm/boot/dts/broadcom/bcm2712-rpi-5-b.dts
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+++ b/arch/arm/boot/dts/broadcom/bcm2712-rpi-5-b.dts
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@@ -819,6 +819,7 @@ spi10_cs_pins: &spi10_cs_gpio1 {};
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pciex1_tperst_clk_ms = <&pciex1>, "brcm,tperst-clk-ms:0";
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pcie_tperst_clk_ms = <&pciex1>, "brcm,tperst-clk-ms:0";
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random = <&random>, "status";
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+ rtc = <&rpi_rtc>, "status";
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rtc_bbat_vchg = <&rpi_rtc>, "trickle-charge-microvolt:0";
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spi = <&spi0>, "status";
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suspend = <&pwr_key>, "linux,code:0=205";
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -307,6 +307,9 @@ Params:
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random Set to "on" to enable the hardware random
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number generator (default "on")
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+ rtc Set to "off" to disable the onboard Real Time
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+ Clock (2712 only, default "on")
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+
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rtc_bbat_vchg Set the RTC backup battery charging voltage in
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microvolts. If set to 0 or not specified, the
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trickle charger is disabled.
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