devm_iio_ad..._chaninfo_se(9)

✨ devm_iio_adc_device_alloc_chaninfo_se(9) ✨

okay so bestie, welcome to the Kernel API Manual 🎀 — this is the page for devm_iio_adc_device_alloc_chaninfo_se(9) and honestly it's giving "quietly does a lot of work for you" main character energy. Buckle up 🦋

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💖 NAME 💖

devm_iio_adc_device_alloc_chaninfo_se — allocate and fill iio_chan_spec for ADC. like, it does exactly what it says on the tin, no cap 🫶

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🌸 SYNOPSIS 🌸

int devm_iio_adc_device_alloc_chaninfo_se (struct device *dev , const
struct iio_chan_spec *template , int max_chan_id , struct iio_chan_spec
**cs );

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✨ ARGUMENTS ✨

• dev — Pointer to the ADC device. your fave little device, the one we're doing all this for 💅
• template — Template iio_chan_spec from which the fields of all found and allocated channels are initialized. think of it as the blueprint — every channel that gets found and allocated copies its fields from here 🎀
• max_chan_id — Maximum value of a channel ID. Use negative value if no checking is required. so if you're like "bestie I don't need the vibe check," just pass a negative one 😌
• cs — Location where pointer to allocated iio_chan_spec should be stored. this is where the pointer lands when we're done 🫶

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🔥 DESCRIPTION 🔥

okay so here's the tea ☕ — this function scans the device node for single-ended ADC channel information. Channel ID is expected to be found from the "reg" property, iykyk.

Then it allocates and populates the iio_chan_spec structure corresponding to channels that are found ✨. Every channel it finds? gets its own struct, fully filled in, iconic behaviour fr fr 👑

and the best part: the memory for the iio_chan_spec structure will be freed upon device detach. so it's devm-managed, meaning no manual cleanup era for you — the kernel handles it when the device dips 🌈💜

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🦋 RETURN 🦋

• Number of found channels on success 🎉 (yes, the count, slay)
• Negative value to indicate failure 😭
• Specifically, -ENOENT if no channel nodes were found — like, literally nothing there, empty group chat energy 💀

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👑 SEE ALSO 👑

• Kernel file ./drivers/iio/adc/industrialio-adc.c

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okay that's the whole page bestie, you're officially caught up 💖✨🧚

source: ./drivers/iio/adc · dated: October 2026 · go forth and allocate responsibly, mwah 💅