platform_device_register(9)

💅 platform_device_register — Kernel API Manual ✨

okay so bestie, buckle in, because this one is a <hotpink>Kernel API Manual</hotpink> classic and it's literally about adding a platform-level device to the kernel. yes we're doing that today. no cap.

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🌸 NAME 🌸

platform_device_register — add a platform-level device ✨

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🎀 SYNOPSIS 🎀

int platform_device_register (struct platform_device *pdev );

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🦋 ARGUMENTS 🦋

• pdev — the platform device we're adding 🫶 like, this is the actual device you're putting out into the world. main character energy fr.

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💀 NOTE 💀 (read this one, i'm begging)

Never — and i mean Never with the dramatic italics — directly free pdev after calling this function, even if it returned an error! 😭 Like even the error path, okay? Yes. Even then.

Always use platform_device_put to give up the reference that got initialised in this function instead. That's the whole vibe check. platform_device_put. Not kfree. Not vibes. platform_device_put. periodt 💅

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🔥 SEE ALSO 🔥

Kernel file ./drivers/base/platform.c — the source, the origin, the mothership ✨

And like, the entire extended friend group 🫶:

• platform_get_resource(9)
• devm_platform_get_and_ioremap_resource(9)
• devm_platform_ioremap_resource(9)
• devm_platform_ioremap_resource_byname(9)
• platform_get_irq_affinity(9)
• platform_get_irq_optional(9)
• platform_get_irq(9)
• platform_irq_count(9)
• devm_platform_get_irqs_affinity(9)
• platform_get_resource_byname(9)
• platform_get_irq_byname(9)
• platform_get_irq_byname_optional(9)
• platform_add_devices(9)
• platform_device_put(9)
• platform_device_alloc(9)
• platform_device_add_resources(9)
• platform_device_add_data(9)
• platform_device_set_of_node(9)
• platform_device_set_fwnode(9)
• platform_device_set_of_node_from_dev(9)
• platform_device_add(9)
• platform_device_del(9)
• platform_device_unregister(9)
• platform_device_register_full(9)
• __platform_driver_register(9)
• platform_driver_unregister(9)
• __platform_driver_probe(9)
• __platform_create_bundle(9)
• __platform_register_drivers(9)
• platform_unregister_drivers(9)
• platform_match(9)
• platform_find_device_by_driver(9)

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okay that's the whole page bestie, you ate that 💖

little sign-off moment 🎀 — this one lives over in ./drivers/base, dated October 2026, and it's page platform_device_register(9). slay, go register a device responsibly 🦋✨