stm32_adc_de...s_reg_access(9)

💅 stm32_adc_debugfs_reg_access — NAME

okay so bestie, this is stm32_adc_debugfs_reg_access — it literally reads or writes a register value, that's the whole gig ✨

We're in the Kernel API Manual, section 9, and honestly? icon era for kernel docs.

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🎀 SYNOPSIS

int stm32_adc_debugfs_reg_access (struct iio_dev *indio_dev , unsigned
reg , unsigned writeval , unsigned *readval );

she takes four things and gives you back an int, no cap 💅

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🌸 ARGUMENTS

• indio_dev — the IIO device structure 🦋 like, the actual device we're poking at
• reg — the register offset 👑 which register are we visiting today
• writeval — the value to write 🎀 if you're in a writing mood
• readval — the value to read 🌸 pointer where the read value lands

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✨ DESCRIPTION

So here's the vibe check 🫶:

To read a value from an ADC register: you echo the ADC reg offset into direct_reg_access, then cat it back out — like leaving a note and then reading your own note:

echo [ADC reg offset] > direct_reg_access
cat direct_reg_access

To write a value in a ADC register: you echo the register offset and the value into direct_reg_access — boom, written 💖

echo [ADC_reg_offset] [value] > direct_reg_access

that's it, that's the whole debugfs situation, we love a simple queen 😭

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🔥 SEE ALSO

the kernel file doing all the heavy lifting: ./drivers/iio/adc/stm32-adc.c — and 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)
• 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)

go read them all, iykyk 📚💜

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💌 sign-off

this little masterpiece lives in ./drivers/iio/adc, and it's stamped October 2026 — that's the source and the date, bestie, we're nothing if not documented 🎀⭐ bye pookie, go read some registers 🦋