__iio_dev_mode_lock(9)

✨ __iio_dev_mode_lock — the Kernel API Manual page you've been waiting for ✨

okay so bestie, welcome to the Kernel API Manual entry for __iio_dev_mode_lock. it's short, it's spicy, and it has OPINIONS. let's get into it 🫶

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🌸 NAME 🌸

__iio_dev_mode_lock — locks the current IIO device mode. that's it. that's the whole vibe check. 🔒

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🦋 SYNOPSIS 🦋

void __iio_dev_mode_lock(struct iio_dev *indio_dev);

literally one function, one argument, returns nothing (void), no cap. 💅

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🎀 ARGUMENTS 🎀

• indio_dev — the iio_dev that's associated with the device. that's the one you're locking, bestie, the main character of this whole operation 👑

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💖 DESCRIPTION 💖

okay so here's the tea ☕ — if the device is either in direct mode or buffer mode, it is guaranteed to stay that way until __iio_dev_mode_unlock gets called. like, locked in. periodt. 🔐

⚠️ but listen — this function is not meant to be used directly by drivers to protect internal state. if you're a driver and you need to guard your own internal state, you should have your own mechanisms for that matter. this is not your personal bodyguard, it's a mode locker. 🙈

and ngl, there are very few cases where a driver actually needs to lock the current mode unconditionally. like, rare rare. so instead, it's recommended that you use iio_device_claim_direct or the iio_device_try_claim_buffer_mode pairs, or related helpers. those are the icons, use those 🌈✨

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🧚 SEE ALSO 🧚

kernel file ./drivers/iio/industrialio-core.c — that's where the magic lives, go read it iykyk 📖

and the whole friend group:

• iio_device_id(9)
• iio_buffer_enabled(9)
• iio_find_channel_from_si(9)
• iio_device_set_clock(9)
• iio_device_get_clock(9)
• iio_get_time_ns(9)
• iio_read_mount_matrix(9)
• iio_format_value(9)
• __iio_str_to_fixpoint(9)
• iio_str_to_fixpoint(9)
• iio_free_chan_devattr_list(9)
• iio_device_alloc(9)
• iio_device_free(9)
• devm_iio_device_alloc(9)
• iio_chrdev_open(9)
• iio_chrdev_release(9)
• iio_active_scan_mask_index(9)
• iio_device_unregister(9)
• __iio_dev_mode_unlock(9)
• iio_device_get_current_mode(9)

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👑 sign-off 👑

this page lives in ./drivers/iio, it's dated October 2026, and it goes by __iio_dev_mode_lock(9) — go forth and lock responsibly, bestie. slay 💅💖🎀🦋⭐