stm32h7_adc_prepare(9)

💅 stm32h7_adc_prepare(9) — the Kernel API Manual, but make it make sense

okay bestie, welcome to the Kernel API Manual page for stm32h7_adc_prepare, and yes this is the whole vibe. one function, one job, and it's lowkey important 🎀

---

✨ NAME ✨

stm32h7_adc_prepare — leave power down mode to enable ADC.

that's it. that's the whole assignment. we are waking the ADC up 🫶

---

🌸 SYNOPSIS 🌸

int stm32h7_adc_prepare (struct iio_dev *indio_dev );

---

🦋 ARGUMENTS 🦋

• indio_dev — the IIO device instance. this is the main character of the call ngl 👑

so here's what "leave power down mode" actually involves, step by step, because the manpage is fr fr listing them all out:

• Leave power down mode.
• Configure channels as single ended or differential before enabling the ADC. order matters, bestie, do not skip ahead 🌈
• Enable ADC.
• Restore calibration data.
• Pre-select channels that may be used in PCSEL (required by input MUX / IO):
  • Only one input is selected for single ended (e.g. 'vinp')
  • Two inputs are selected for differential channels (e.g. 'vinp' & 'vinn')

like, the pre-select step isn't optional filler — the input MUX / IO literally requires it, so don't come for me if you skip it 😭

---

👑 SEE ALSO 👑

Kernel file ./drivers/iio/adc/stm32-adc.c, plus the whole friend group:

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_selfcalib(9), stm32h7_adc_check_selfcalib(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)

---

and that's the page!! sourced from . /drivers/iio/adc in October 2026 — luv u, go wake up that ADC, slay 💖✨