sdw_slave_wait_for_init(9)

💅 sdw_slave_wait_for_init — bestie's guide to the Kernel API Manual ✨

okay so you found sdw_slave_wait_for_init in the Kernel API Manual and you're like "what is this, why is it here, do I need it". Sit down, grab a strawberry 🍓, we're gonna get through this together.

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🌸 NAME 🌸

sdw_slave_wait_for_init — literally just waiting for device initialisation. that's the whole vibe. it waits. for the device. to be initialised. iconic behaviour honestly 👑

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✨ SYNOPSIS ✨

int sdw_slave_wait_for_init (struct sdw_slave *slave , int timeout_ms );

that's it. that's the call. two arguments, one int coming back at you 🫶

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🎀 ARGUMENTS 🎀

• slave — pointer to the SoundWire peripheral 💖 yeah it's called slave, that's the actual kernel naming, we don't fight the kernel naming, we just pass the pointer.
• timeout_ms — the timeout, in milliseconds ⏱️ like how long you're willing to stand there waiting before you're like "okay I'm done". your patience, quantified.

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🦋 DESCRIPTION 🦋

So here's the tea ☕ — this function waits for a peripheral device to enumerate and be initialised by the SoundWire core. That's it, that's the job.

it's giving "held at the door until the bouncer says you're on the list" 💅 the peripheral doesn't get to be initialised until the SoundWire core has done its thing, and this is the call that sits there and waits for that to happen. no cap, that's genuinely all it does.

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⭐ RETURN ⭐

• Zero on success 🎉 (zero is the good number here, iykyk)
• a negative error code on failure 😭 so like, if it didn't work, you get a negative number, go handle it.

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🌈 SEE ALSO 🌈

okay this section is a whole friend group, buckle up. the kernel file ./include/linux/soundwire/sdw.h is the main character here, and then:

• enum sdw_slave_status(9)
• enum sdw_clk_stop_type(9)
• enum sdw_command_response(9)
• enum sdw_stream_type(9)
• enum sdw_data_direction(9)
• enum sdw_port_data_mode(9)
• enum sdw_p15_behave(9)
• enum sdw_dpn_type(9)
• enum sdw_clk_stop_mode(9)
• struct sdw_dp0_prop(9)
• struct sdw_dpn_prop(9)
• struct sdw_slave_prop(9)
• struct sdw_master_prop(9)
• struct sdw_slave_id(9)
• struct sdw_slave_intr_status(9)
• enum sdw_reg_bank(9)
• struct sdw_prepare_ch(9)
• enum sdw_port_prep_ops(9)
• struct sdw_bus_params(9)
• struct sdw_slave_ops(9)
• struct sdw_slave(9)
• struct sdw_master_device(9)
• struct sdw_port_params(9)
• struct sdw_transport_params(9)
• struct sdw_enable_ch(9)
• struct sdw_master_port_ops(9)
• struct sdw_defer(9)
• struct sdw_master_ops(9)
• struct sdw_port_config(9)
• struct sdw_stream_config(9)
• enum sdw_stream_state(9)
• struct sdw_stream_params(9)
• struct sdw_stream_runtime(9)
• struct sdw_bus(9)

go read them, they're all in ./include/linux/soundwire and they're all rooting for you 🧚💜

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mwah 💋 that's the whole page. sourced straight from ./include/linux/soundwire, dated October 2026, and yeah — it's sdw_slave_wait_for_init(9) all the way down. slay, go init some devices 🎀✨