From: Sander Speetjens <sander.speetjens@gmail.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Florian Fainelli <florian.fainelli@broadcom.com>,
Jonathan Bell <jonathan@raspberrypi.com>,
Stefan Wahren <wahrenst@gmx.net>,
linux-rtc@vger.kernel.org, devicetree@vger.kernel.org,
linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, sander.speetjens@gmail.com
Subject: [PATCH 3/3] arm64: dts: broadcom: Add RTC to Raspberry Pi 5 B
Date: Wed, 9 Sep 2026 16:13:00 +0200 [thread overview]
Message-ID: <20260909141300.1368790-4-sander.speetjens@gmail.com> (raw)
In-Reply-To: <20260909141300.1368790-1-sander.speetjens@gmail.com>
The Raspberry Pi 5 contains a RTC on a custom DA9091 PMIC that is accesed trought the firware mailbox.
This so we have a battery backed RTC, so the OS does not need network to get the time.
Signed-off-by: Sander Speetjens <sander.speetjens@gmail.com>
---
arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi
index b7a6bc34ae1a..5a82dd585f32 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi
@@ -102,6 +102,13 @@ wl_on_reg: wl-on-reg {
startup-delay-us = <150000>;
enable-active-high;
};
+
+ rpi_rtc: rpi-rtc {
+ compatible = "raspberrypi,rpi-rtc";
+ firmware = <&firmware>;
+ status = "okay";
+ trickle-charge-microvolt = <0>;
+ };
};
&pinctrl {
--
2.55.0
next prev parent reply other threads:[~2026-09-09 14:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-09 14:12 [PATCH 0/3] Raspberry Pi 5 RTC driver Sander Speetjens
2026-09-09 14:12 ` [PATCH 1/3] dt-bindings: rtc: Add Raspberry Pi 5 RTC binding Sander Speetjens
2026-09-09 14:23 ` sashiko-bot
2026-09-09 15:15 ` Alexandre Belloni
2026-09-09 15:47 ` Krzysztof Kozlowski
2026-09-09 15:54 ` Krzysztof Kozlowski
2026-09-09 20:38 ` Sander Speetjens
[not found] ` <CAAOJLPHNGgC7B=7ESCifZ1FPcR6V=Hcg-q-aaVg_9M_-d6Fh2A@mail.gmail.com>
2026-09-10 7:08 ` Krzysztof Kozlowski
2026-09-10 8:10 ` Sander Speetjens
2026-09-10 16:33 ` Stefan Wahren
2026-09-09 14:12 ` [PATCH 2/3] rtc: Add Raspberry Pi 5 RTC driver Sander Speetjens
2026-09-09 14:34 ` sashiko-bot
2026-09-09 15:20 ` Alexandre Belloni
2026-09-09 15:22 ` Alexandre Belloni
2026-09-09 15:44 ` Krzysztof Kozlowski
2026-09-09 14:13 ` Sander Speetjens [this message]
2026-09-09 14:44 ` [PATCH 3/3] arm64: dts: broadcom: Add RTC to Raspberry Pi 5 B sashiko-bot
2026-09-09 15:47 ` Krzysztof Kozlowski
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