| Message ID | 20250410005912.118732-1-aford173@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [1/9] arm64: dts: imx8mm-beacon: Fix RTC capacitive load | expand |
On Wed, Apr 09, 2025 at 07:58:55PM -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 > default being 7000, when the hardware is really using 12500. > Fixing this setting to fix the drift. "Fix RTC drift by correcting the capacitive load setting from 7000 to 12500, which matches the actual hardware configuration." should be enough. Frank > > Fixes: 593816fa2f35 ("arm64: dts: imx: Add Beacon i.MX8m-Mini development kit") > Signed-off-by: Adam Ford <aford173@gmail.com> > --- > arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi > index 62ed64663f49..9ba0cb89fa24 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi > +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi > @@ -233,6 +233,7 @@ 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/imx8mm-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi index 62ed64663f49..9ba0cb89fa24 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi @@ -233,6 +233,7 @@ 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 default being 7000, when the hardware is really using 12500. Fixing this setting to fix the drift. Fixes: 593816fa2f35 ("arm64: dts: imx: Add Beacon i.MX8m-Mini development kit") Signed-off-by: Adam Ford <aford173@gmail.com> --- arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi | 1 + 1 file changed, 1 insertion(+)