stm32h7_adc_selfcalib(9)

💅 stm32h7_adc_selfcalib(9) — like, the ADC calibration glow-up ✨

okay bestie, so this is a page from the Kernel API Manual, and honestly? it's a short one, but it's important. it's all about getting your STM32H7 ADC to actually be accurate, which is giving main character energy for any measurement app. let's get into it 🎀

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🌸 NAME 🌸

stm32h7_adc_selfcalib — the whole procedure to calibrate the ADC, fr fr.

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🦋 SYNOPSIS 🦋

int stm32h7_adc_selfcalib (struct iio_dev *indio_dev , int do_lincal );

that's the whole signature, no cap. 💅

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✨ ARGUMENTS ✨

• indio_dev — your IIO device instance, aka the ADC babe we're calibrating 🫶
• do_lincal — the linear calibration request flag. it's literally a flag: set it if you want the linear cal to run.

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🎀 NOTE 🎀

bestie, read this one, it's not optional: Must be called once ADC is out of power down. like, the ADC has to be awake before you calibrate it. no calibrating a sleeping ADC, that's not the vibe. 😭

and then the actual behaviour, super clear:

• Run offset calibration unconditionally. always. no asking. it just happens. 💅
• Run linear calibration if it's requested and supported. requested but unsupported? nope, it does not happen, don't come for me.

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🔥 SEE ALSO 🔥

the kernel file is ./drivers/iio/adc/stm32-adc.c, and here's the whole squad it hangs out with:

• struct stm32_adc_ic(9)
• struct stm32_adc_trig_info(9)
• struct stm32_adc_calib(9)
• struct stm32_adc_regs(9)
• struct stm32_adc_vrefint(9)
• struct stm32_adc_regspec(9)
• struct stm32_adc_cfg(9)
• struct stm32_adc(9)
• struct stm32_adc_info(9)
• stm32_adc_conv_irq_enable(9)
• stm32_adc_conv_irq_disable(9)
• stm32f4_adc_start_conv(9)
• stm32h7_adc_read_selfcalib(9)
• stm32h7_adc_restore_selfcalib(9)
• stm32h7_adc_check_selfcalib(9)
• stm32h7_adc_prepare(9)
• stm32_adc_conf_scan_seq(9)
• stm32_adc_get_trig_extsel(9)
• stm32_adc_set_trig(9)
• stm32_adc_single_conv(9)
• stm32_adc_validate_trigger(9)
• stm32_adc_debugfs_reg_access(9)

like, go read those if you wanna know the whole lore. iykyk 🧚

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and that's the page!! this little beauty lives in ./drivers/iio/adc, from the October 2026 era of the Kernel API Manual. slay, calibrate responsibly, and always wake your ADC up first 💖⭐🍓