| Message ID | 20250416010141.1785841-3-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 08:01:29PM -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: 25a5ccdce767 ("arm64: dts: freescale: Introduce imx8mp-beacon-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/imx8mp-beacon-som.dtsi | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi > index 15f7ab58db36..88561df70d03 100644 > --- a/arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi > +++ b/arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi > @@ -257,6 +257,7 @@ 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/imx8mp-beacon-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi index 15f7ab58db36..88561df70d03 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi @@ -257,6 +257,7 @@ 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: 25a5ccdce767 ("arm64: dts: freescale: Introduce imx8mp-beacon-kit") Signed-off-by: Adam Ford <aford173@gmail.com> --- V2: Change commit message, no active changes. arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi | 1 + 1 file changed, 1 insertion(+)