i3c_master_do_daa_ext(9)

✨ i3c_master_do_daa_ext 💅

okay so bestie, welcome to the i3c_master_do_daa_ext(9) page — part of the Kernel API Manual, and honestly? kind of iconic. this is the extended version of Dynamic Address Assignment, and yes the "extended" is doing a lot of work here 🎀

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🌸 NAME 🌸

i3c_master_do_daa_ext — Dynamic Address Assignment (extended version) ✨

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🦋 SYNOPSIS 🦋

int i3c_master_do_daa_ext (struct i3c_master_controller *master , bool
rstdaa );

like, that's the whole vibe-check entry point right there 👑

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💖 ARGUMENTS 💖

• master — the controller. your main character, fr fr 💅
• rstdaa — a bool telling you whether to first perform a Reset of Dynamic Addresses (RSTDAA). think of it as the "do i need to wipe the slate first?" switch 🧹

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🔥 DESCRIPTION 🔥

so what does it do? it performs Dynamic Address Assignment, with optional support for System Hibernation — and that optional part is when rstdaa is true 😌

here's the lowkey important part: after System Hibernation, Dynamic Addresses can have been reassigned at boot time to different values. yes, they can just... change on you. rude, but okay 🫠

a simple strategy is followed to handle that, no cap:

1. Perform a Reset of Dynamic Addresses (RSTDAA) 🧼
2. Follow it up with the normal DAA procedure — which has provision for reassigning addresses that differ from the previously recorded addresses 🔁

that's it. simple strategy, big energy. periodt 💜

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⭐ RETURN ⭐

• a 0 in case of success 🎉
• a negative error code otherwise 😭

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👑 SEE ALSO 👑

Kernel file ./drivers/i3c/master.c, plus this whole squad right here 🫶:

• i3c_bus_maintenance_lock(9)
• i3c_bus_maintenance_unlock(9)
• i3c_bus_normaluse_lock(9)
• i3c_bus_normaluse_unlock(9)
• i3c_master_queue_hotjoin(9)
• i3c_master_send_ccc_cmd_locked(9)
• i3c_master_get_free_addr(9)
• i3c_master_setaasa_locked(9)
• i3c_master_entdaa_locked(9)
• i3c_master_enec_disec_locked(9)
• i3c_master_disec_locked(9)
• i3c_master_enec_locked(9)
• i3c_master_defslvs_locked(9)
• i3c_master_reattach_i3c_dev_locked(9)
• i3c_master_has_wakeup_enabled_devs(9)
• i3c_master_dma_map_single(9)
• i3c_master_dma_unmap_single(9)
• i3c_master_set_info(9)
• i3c_master_bus_init(9)
• __i3c_master_add_i3c_dev_locked(9)
• i3c_master_add_i3c_dev_locked(9)
• i3c_master_do_daa(9)
• i3c_master_queue_ibi(9)
• i3c_generic_ibi_free_pool(9)
• i3c_generic_ibi_alloc_pool(9)
• i3c_generic_ibi_get_free_slot(9)
• i3c_generic_ibi_recycle_slot(9)
• i3c_master_register(9)
• i3c_master_unregister(9)
• i3c_dev_disable_ibi_locked(9)
• i3c_dev_enable_ibi_locked(9)
• i3c_dev_request_ibi_locked(9)
• i3c_dev_free_ibi_locked(9)

like, that's a whole friend group and they all ate 💀✨

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and that's the page!! sourced from ./drivers/i3c, dated October 2026, living in the Kernel API Manual — mwah, go read some more manpages bestie, iykyk 🌈🎀💖