| Message ID | 20250416010141.1785841-2-aford173@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [V2,01/10] arm64: dts: imx8mm-beacon: Fix RTC capacitive load | expand |
On Tue, Apr 15, 2025 at 08:01:28PM -0500, Adam Ford wrote: > 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 not being > properly set. Fix RTC drift by correcting the capacitive load setting > from 7000 to 12500, which matches the actual hardware configuration. > > Fixes: 36ca3c8ccb53 ("arm64: dts: imx: Add Beacon i.MX8M Nano development kit") > Signed-off-by: Adam Ford <aford173@gmail.com> > --- Reviewed-by: Frank Li <Frank.Li@nxp.com> > V2: Change commit message, no active changes. > > 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 >
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>; }; };
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 not being properly set. Fix RTC drift by correcting the capacitive load setting from 7000 to 12500, which matches the actual hardware configuration. Fixes: 36ca3c8ccb53 ("arm64: dts: imx: Add Beacon i.MX8M Nano development kit") Signed-off-by: Adam Ford <aford173@gmail.com> --- V2: Change commit message, no active changes. arch/arm64/boot/dts/freescale/imx8mn-beacon-som.dtsi | 1 + 1 file changed, 1 insertion(+)