devm_platfor...map_resource(9)

💖 NAME 💖

devm_platform_get_and_ioremap_resource — bestie, this one literally calls devm_ioremap_resource() for a platform device and hands you back the resource. two-for-one, no cap ✨

This page lives in the Kernel API Manual, and it's giving "small function, big job" energy. 🫶

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🌸 SYNOPSIS 🌸

void __iomem * devm_platform_get_and_ioremap_resource (struct
       platform_device *pdev , unsigned int index , struct resource **res );

ok so it returns a void __iomem *, takes three things, and yes the formatting is exactly like that. don't come for me, I don't make the rules 💅

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🎀 ARGUMENTS 🎀

• pdev — the platform device. it's the main character here: used both for looking up the memory resource and for the resource management. one struct, two jobs, she's booked and busy 👑
• index — the resource index. which one you want. the number, the vibe check, the iykyk. 🔢
• res — optional output parameter, and it stores a pointer to the obtained resource. optional!! so if you don't care, you can absolutely pass nothing and mind your business 🙈

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⭐ RETURN ⭐

you get back a pointer to the remapped memory 🌈 — or, if things go sideways, an ERR_PTR encoded error code. so like, check it. fr fr. don't just start dereferencing and hope 😭

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🦋 SEE ALSO 🦋

the Kernel file is ./drivers/base/platform.c — that's where the magic lives. and here's the whole friend group, everyone invited to the group chat 💜:

• platform_get_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_register(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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✨ that's the whole page, bestie ✨ straight from ./drivers/base, dated October 2026, and the title up top is still devm_platfor...map_resource(9) because the truncation is iconic and we respect it 💅🎀💖