find_io_range_by_fwnode(9)

💅 find_io_range_by_fwnode(9) — like, the Kernel API Manual era 🎀

okay so bestie, welcome to the Kernel API Manual page for find_io_range_by_fwnode(9) — yes the whole thing is in section 9, yes that's the kernel section, no we're not scared 💖

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✨ NAME ✨

find_io_range_by_fwnode — literally finds the logical PIO range for a given FW node 🦋

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🌸 SYNOPSIS 🌸

struct logic_pio_hwaddr * find_io_range_by_fwnode (const struct
       fwnode_handle *fwnode );

that's the whole signature, copy it exactly bestie, no cap 🔥

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🎀 ARGUMENTS 🎀

• fwnode — the FW node handle that's associated with the logical PIO range 🫶 like, this is the thing we're out here looking for a match for.

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💜 DESCRIPTION 💜

So basically: it returns a pointer to the node on success, and NULL otherwise. That's it. That's the vibe check 😭

Under the hood it traverses the io_range_list to find the registered node for fwnode — like a little scavenger hunt through the list, main character energy only 🔍✨

ngl, if it doesn't find your node, you get NULL. Not an error code, not a dramatic exit — just NULL. Handle it 💀

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🌈 SEE ALSO 🌈

• Kernel file ./lib/logic_pio.c
• logic_pio_register_range(9)
• logic_pio_unregister_range(9)
• logic_pio_to_hwaddr(9)
• logic_pio_trans_hwaddr(9)

these are the sister pages, go read them too, iykyk 👑

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and that's the page!! sign-off time: this one lives under ./lib, dated October 2026, and it's giving iconic kernel documentation energy fr fr ⭐💅🧚‍♀️ bye bestie 🍓