v4l2_async_...ubdev_sensor(9)

✨ v4l2_async_...ubdev_sensor(9) ✨

okay so bestie, welcome to the Kernel API Manual — this one lives in the kernel-media corner of the universe and it's literally the sensor-registration glow-up you've been waiting for 💅

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🌸 NAME 🌸

v4l2_async_register_subdev_sensor — registers a sensor sub-device to the asynchronous sub-device framework and parse set up common sensor related devices 🎀

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🦋 SYNOPSIS 🦋

v4l2_async_register_subdev_sensor (sd );

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💖 ARGUMENTS 💖

• sd — pointer to struct v4l2_subdev 🫶 (yes, that's it, that's the whole argument list, she's low maintenance)

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🔥 DESCRIPTION 🔥

So this function is just like v4l2_async_register_subdev — like, same energy, same vibe — with the exception that calling it will also parse firmware interfaces for remote references using v4l2_async_nf_parse_fwnode_sensor and registers the async sub-devices. Iconic, honestly. She does the extra credit ✨

And the sub-device is similarly unregistered by calling v4l2_async_unregister_subdev — so what goes in must come out, no cap. 🌈

While registered, the subdev module is marked as in-use. 👑

⚠️ An error is returned if the module is no longer loaded on any attempts to register it. So like... if the module dipped, you're not getting a registration out of it, fr fr. 😭

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🌟 SEE ALSO 🌟

Kernel file ./include/media/v4l2-async.h and honestly the whole friend group:

• enum v4l2_async_match_type(9)
• struct v4l2_async_match_desc(9)
• struct v4l2_async_connection(9)
• struct v4l2_async_notifier_operations(9)
• struct v4l2_async_notifier(9)
• struct v4l2_async_subdev_endpoint(9)
• v4l2_async_debug_init(9)
• v4l2_async_nf_init(9)
• v4l2_async_subdev_nf_init(9)
• v4l2_async_nf_add_fwnode(9)
• v4l2_async_nf_add_fwnode_remote(9)
• v4l2_async_nf_add_i2c(9)
• v4l2_async_subdev_endpoint_add(9)
• v4l2_async_connection_unique(9)
• v4l2_async_nf_register(9)
• v4l2_async_nf_unregister(9)
• v4l2_async_nf_cleanup(9)
• v4l2_async_register_subdev(9)
• v4l2_async_unregister_subdev(9)

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and that's the whole page, bestie 💜 this gem is brought to you by ./include/media, dated October 2026, and it answers to the name v4l2_async_...ubdev_sensor(9) 🦋 — go forth and register those sensors, iykyk 🎀