From: Adam Ford <aford173@gmail.com>
To: linux-arm-kernel@lists.infradead.org
Cc: aford@beaconembedded.com, Adam Ford <aford173@gmail.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-kernel@vger.kernel.org
Subject: [PATCH 2/9] arm64: dts: imx8mn-beacon: Fix RTC capacitive load
Date: Wed, 9 Apr 2025 19:58:56 -0500 [thread overview]
Message-ID: <20250410005912.118732-2-aford173@gmail.com> (raw)
In-Reply-To: <20250410005912.118732-1-aford173@gmail.com>
Although not noticeable when used every day, the RTC appears to drift
when left to sit over time. This is due to the capacitive load
default being 7000, when the hardware is really using 12500.
Fixing this setting to fix the drift.
Fixes: 36ca3c8ccb53 ("arm64: dts: imx: Add Beacon i.MX8M Nano development kit")
Signed-off-by: Adam Ford <aford173@gmail.com>
---
arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi
index 2a64115eebf1..bb11590473a4 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi
@@ -242,6 +242,7 @@ eeprom@50 {
rtc: rtc@51 {
compatible = "nxp,pcf85263";
reg = <0x51>;
+ quartz-load-femtofarads = <12500>;
};
};
--
2.48.1
next prev parent reply other threads:[~2025-04-10 1:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-10 0:58 [PATCH 1/9] arm64: dts: imx8mm-beacon: Fix RTC capacitive load Adam Ford
2025-04-10 0:58 ` Adam Ford [this message]
2025-04-10 0:58 ` [PATCH 3/9] arm64: dts: imx8mp-beacon: " Adam Ford
2025-04-10 0:58 ` [PATCH 4/9] arm64: dts: imx8mm-beacon: Fix HDMI sound output Adam Ford
2025-04-10 16:07 ` Frank Li
2025-04-10 0:58 ` [PATCH 5/9] arm64: dts: imx8mn-beacon: " Adam Ford
2025-04-10 0:59 ` [PATCH 6/9] arm64: dts: imx8mm-beacon: Configure Ethernet reset and IRQ GPIO Adam Ford
2025-04-10 16:11 ` Frank Li
2025-04-10 0:59 ` [PATCH 7/9] arm64: dts: imx8mn-beacon: " Adam Ford
2025-04-10 0:59 ` [PATCH 8/9] arm64: dts: imx8mm-beacon: Enable RTC interrupt and wakeup-source Adam Ford
2025-04-10 16:14 ` Frank Li
2025-04-10 0:59 ` [PATCH 9/9] arm64: dts: imx8mn-beacon: " Adam Ford
2025-04-10 15:58 ` [PATCH 1/9] arm64: dts: imx8mm-beacon: Fix RTC capacitive load Frank Li
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