dln2_transfer_tx(9)

💅 dln2_transfer_tx(9) — like, the Kernel API Manual but make it make sense

okay bestie, so this is a page straight out of the Kernel API Manual (that's the manual name, we're folding it in, you're welcome 🎀), and it's about dln2_transfer_tx — the lowkey icon of the dln2 family. let's get into it ✨

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✨ NAME ✨

dln2_transfer_tx — a variant of @dln2_transfer() where the RX buffer is not needed 🦋

like, it's the same vibe as dln2_transfer(), just without the whole "give me a buffer to receive stuff into" situation. no RX, no problem 💅

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🌸 SYNOPSIS 🌸

int dln2_transfer_tx (struct platform_device *pdev , u16 cmd , const
void *obuf , unsigned obuf_len );

that's the whole signature, fr fr. int coming back atcha, pdev, cmd, obuf, obuf_len. she's compact, she's iconic 👑

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🫶 ARGUMENTS 🫶

ngl the original page is a little mysterious here and just says -- undescribed -- for all of them 😭 so here's the honest tea:

• pdev — -- undescribed --
• cmd — -- undescribed --
• obuf — -- undescribed --
• obuf_len — -- undescribed --

but DON'T panic, bestie, because the DESCRIPTION section below literally describes every single one of them. slay for the sequel 💖

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💜 DESCRIPTION 💜

okay so here's who's who in the cast:

• pdev — the sub-device which is issuing this transfer 👑
• cmd — the command to be sent to the device
• obuf — the buffer to be sent to the device; it can be NULL if the user doesn't need to transmit data with this command 🌈
• obuf_len — the size of the buffer to be sent to the device

and then, the return tea:

return 0 for success, negative value for errors 💀

that's it, that's the contract. zero means we ate. negative means something went sideways and you should probably look at it 🙈

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🔥 SEE ALSO 🔥

• Kernel file ./include/linux/mfd/dln2.h
• dln2_unregister_event_cb(9)
• dln2_transfer(9)
• dln2_transfer_rx(9)

the whole dln2 friend group, honestly. go say hi 🫶

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and that's the page, bestie 💖 this one came to you from the ./include/linux/mfd corner of the world, dated October 2026, and it's dln2_transfer_tx(9) — no cap, that's the whole thing. bye bestieee 🎀✨