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overlays: i2c-rtc: Add quartz-load-femtofarads #7660

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Merged
pelwell merged 2 commits into from
Sep 29, 2026
+12 −2
Merged

overlays: i2c-rtc: Add quartz-load-femtofarads #7660

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76f1828
overlays: i2c-rtc: Add quartz-load-femtofarads
Aurora-NICExq Sep 29, 2026
647e366
overlays: i2c-rtc: Fix README parameter alignment
Aurora-NICExq Sep 29, 2026
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8 changes: 8 additions & 0 deletions arch/arm/boot/dts/overlays/README
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Original file line number Diff line number Diff line change
Expand Up @@ -2492,6 +2492,10 @@ Params: abx80x Select one of the ABx80x family:
and Vdd < Vddsw and Vbackup > Vddsw)
(RV3028, RV3032)

quartz-load-femtofarads
Quartz load capacitance in femtofarads,
7000 or 12500 (PCF85063, PCF85063A)


Name: i2c-rtc-gpio
Info: Adds support for a number of I2C Real Time Clock devices
Expand Down Expand Up @@ -2574,6 +2578,10 @@ Params: abx80x Select one of the ABx80x family:
and Vdd < Vddsw and Vbackup > Vddsw)
(RV3028, RV3032)

quartz-load-femtofarads
Quartz load capacitance in femtofarads,
7000 or 12500 (PCF85063, PCF85063A)

i2c_gpio_sda GPIO used for I2C data (default "23")

i2c_gpio_scl GPIO used for I2C clock (default "24")
Expand Down
6 changes: 4 additions & 2 deletions arch/arm/boot/dts/overlays/i2c-rtc-common.dtsi
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Expand Up @@ -209,7 +209,7 @@
#address-cells = <1>;
#size-cells = <0>;

pcf85063@51 {
pcf85063: pcf85063@51 {
compatible = "nxp,pcf85063";
reg = <0x51>;
};
Expand All @@ -222,7 +222,7 @@
#address-cells = <1>;
#size-cells = <0>;

pcf85063a@51 {
pcf85063a: pcf85063a@51 {
compatible = "nxp,pcf85063a";
reg = <0x51>;
};
Expand Down Expand Up @@ -378,5 +378,7 @@
<&m41t62>,"wakeup-source?",
<&m41t80>,"wakeup-source?",
<&pcf8563>,"wakeup-source?";
quartz-load-femtofarads = <&pcf85063>,"quartz-load-femtofarads:0",
<&pcf85063a>,"quartz-load-femtofarads:0";
};
};
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