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overlays: i2c-rtc: Add quartz-load-femtofarads - #7660
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pelwell merged 2 commits intoSep 29, 2026
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Expose the existing DT property on pcf85063/pcf85063a so 12.5 pF crystals can be selected from config.txt. Signed-off-by: Arthur Guilliman <auroraxq@protonmail.com>
pelwell
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Sep 29, 2026
| and Vdd < Vddsw and Vbackup > Vddsw) | ||
| (RV3028, RV3032) | ||
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| quartz-load-femtofarads Quartz load capacitance in femtofarads, |
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The README parser in the dtoverlay and dtparam commands is very limited, and it requires the descriptions to start on column 33. Either delete one of the spaces:
quartz-load-femtofarads Quartz load capacitance in femtofarads,
or move the description down to the next line:
quartz-load-femtofarads
Quartz load capacitance in femtofarads,
Start the description on column 33. Signed-off-by: Arthur Guilliman <auroraxq@protonmail.com>
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kernel: ASoC: iqaudio-codec: Add mic-only start-up delay See: raspberrypi/linux#7535 kernel: configs: Enable CONFIG_DRM_PANIC See: raspberrypi/linux#7637 kernel: drm/vc4: fix two phase errors in the HVS scaler, and the chroma siting default See: raspberrypi/linux#7630 kernel: Make the MXL86110 LEDs emulate the BCM54210 See: raspberrypi/linux#7640 kernel: Starvis2 sensor driver support (IMX662) See: raspberrypi/linux#7615 kernel: media: i2c: arducam_64mp: Fix crop sizes for 9152x6944 and 8000x6000 See: raspberrypi/linux#7652 kernel: hwmon: rp1-adc: fix spinlock leak on errors See: raspberrypi/linux#7656 kernel: media: sony-starvis2: Correct the minimum exposure See: raspberrypi/linux#7658 kernel: overlays: i2c-rtc: Add quartz-load-femtofarads See: raspberrypi/linux#7660 kernel: dmaengine: dw-axi-dmac: Add channel abort support See: raspberrypi/linux#7654
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kernel: ASoC: iqaudio-codec: Add mic-only start-up delay See: raspberrypi/linux#7535 kernel: configs: Enable CONFIG_DRM_PANIC See: raspberrypi/linux#7637 kernel: drm/vc4: fix two phase errors in the HVS scaler, and the chroma siting default See: raspberrypi/linux#7630 kernel: Make the MXL86110 LEDs emulate the BCM54210 See: raspberrypi/linux#7640 kernel: Starvis2 sensor driver support (IMX662) See: raspberrypi/linux#7615 kernel: media: i2c: arducam_64mp: Fix crop sizes for 9152x6944 and 8000x6000 See: raspberrypi/linux#7652 kernel: hwmon: rp1-adc: fix spinlock leak on errors See: raspberrypi/linux#7656 kernel: media: sony-starvis2: Correct the minimum exposure See: raspberrypi/linux#7658 kernel: overlays: i2c-rtc: Add quartz-load-femtofarads See: raspberrypi/linux#7660 kernel: dmaengine: dw-axi-dmac: Add channel abort support See: raspberrypi/linux#7654
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Add a quartz-load-femtofarads parameter to i2c-rtc (and i2c-rtc-gpio, they share the same dtsi). The driver already accepts 7000 or 12500; without the overlay option, 12.5 pF crystals stay on the 7 pF default.
Fixes #6720