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[212.71.14.70]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-485883c074asm43273521f8f.23.2026.09.09.07.13.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 07:13:19 -0700 (PDT) From: Sander Speetjens To: Alexandre Belloni Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Jonathan Bell , Stefan Wahren , 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 Message-ID: <20260909141300.1368790-4-sander.speetjens@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260909141300.1368790-1-sander.speetjens@gmail.com> References: <20260909141300.1368790-1-sander.speetjens@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260909_151321_828560_C80461E1 X-CRM114-Status: GOOD ( 11.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- 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