spi_offload_trigger_enable(9)

🦋 spi_offload_trigger_enable(9) 🦋

okay so this one is straight out of the Kernel API Manual, and it’s giving “let the offload trigger cook” energy 💅✨

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✨ NAME ✨

spi_offload_trigger_enable — enables the trigger for offload, periodt 💖

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🌸 SYNOPSIS 🌸

int spi_offload_trigger_enable (struct spi_offload *offload , struct
       spi_offload_trigger *trigger , struct spi_offload_trigger_config *config
       );

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🎀 ARGUMENTS 🎀

• offload — the offload instance, bestie 🫶
• trigger — the offload trigger instance ✨
• config — the trigger config that needs to be validated 👑

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💜 DESCRIPTION 💜

okay so before this can do its thing, there has to be a prepared offload instance with the specified ID, meaning spi_optimize_message was called with the same offload assigned to the message. no cap, that’s the setup requirement 🔥

this also reserves the bus for exclusive use by the offload instance until the trigger is disabled. during that time, any other attempts to send a transfer or lock the bus will fail with -EBUSY — like, the bus is literally booked and busy 💀

calls must be balanced with spi_offload_trigger_disable, bestie. don’t leave it hanging 🙈

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🧚 CONTEXT 🧚

can sleep 😴💤 — yes, this one is allowed to snooze.

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🌈 RETURN 🌈

0 on success, otherwise a negative error code 💖

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⭐ SEE ALSO ⭐

• Kernel file ./drivers/spi/spi-offload.c
• devm_spi_offload_alloc(9)
• devm_spi_offload_get(9)
• devm_spi_offload_trigger_get(9)
• spi_offload_trigger_validate(9)
• spi_offload_trigger_disable(9)
• devm_spi_offload_tx_stream_request_dma_chan(9)
• devm_spi_offload_rx_stream_request_dma_chan(9)
• devm_spi_offload_trigger_register(9)
• spi_offload_trigger_get_priv(9)

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mwah 💖 this little page came from ./drivers/spi, dated October 2026, and it’s all about spi_offload_trigger_enable(9). bye bestie 🫶💅