of_dma_find_controller(9)

💖 NAME 💖

okay so bestie, welcome to of_dma_find_controller(9) from the Kernel API Manual — this one is literally “Get a DMA controller in DT DMA helpers list.” 💅✨

🌸 SYNOPSIS 🌸

struct of_dma * of_dma_find_controller (const struct of_phandle_args
*dma_spec );

🎀 ARGUMENTS 🎀

• dma_spec — pointer to DMA specifier as found in the device tree 🫶

✨ DESCRIPTION ✨

So the way this works: it finds a DMA controller with matching device node and number for dma cells in a list of registered DMA controllers. 🔍💖

If a match is found, a valid pointer to the DMA data stored is returned. If no match is found, a NULL pointer is returned. no cap, that’s the whole vibe check 😭👑

🦋 SEE ALSO 🦋

Kernel file ./drivers/dma/of-dma.c — and these iconic cross-refs, periodt:

• of_dma_router_xlate(9)
• of_dma_controller_register(9)
• of_dma_controller_free(9)
• of_dma_router_register(9)
• of_dma_match_channel(9)
• of_dma_request_slave_channel(9)
• of_dma_simple_xlate(9)
• of_dma_xlate_by_chan_id(9)

mwah 💋 this little page lives under ./drivers/dma and is dated October 2026 — bye bestie, go slay some DMA lookups 🌈💜