stm32_spi_pr...dma_chaining(9)

💅 stm32_spi_pr...dma_chaining(9) 💅

okay so bestie, this little icon is straight out of the Kernel API Manual — and it's about one very specific function. no cap, it's a tiny page, but we're gonna treat it with the respect it deserves 💖

✨ NAME ✨

stm32_spi_prepare_rx_dma_mdma_chaining — the function that prepares RX DMA and MDMA chaining, periodt. it's giving "get the RX DMA and MDMA ready to chain" energy 🫶

🛠️ SYNOPSIS 🛠️

int stm32_spi_prepare_rx_dma_mdma_chaining (struct stm32_spi *spi ,
       struct spi_transfer *xfer , struct dma_slave_config *rx_dma_conf ,
       struct dma_async_tx_descriptor **rx_dma_desc , struct
       dma_async_tx_descriptor **rx_mdma_desc );

🫶 ARGUMENTS 🫶

• spi — pointer to the spi controller data structure. iconic.
• xfer — pointer to the spi transfer.
• rx_dma_conf — pointer to the DMA configuration for the RX channel.
• rx_dma_desc — pointer to the RX DMA descriptor.
• rx_mdma_desc — pointer to the RX MDMA descriptor.

💖 DESCRIPTION 💖

Return-value vibe check, bestie: it must return 0 if the chaining is possible, or an error code if not. that's literally the assignment 🔥

🌈 SEE ALSO 🌈

the whole squad is here, and yes you should go peek at them:

• Kernel file: ./drivers/spi/spi-stm32.c
• struct stm32_spi_reg(9)
• struct stm32_spi_regspec(9)
• struct stm32_spi_cfg(9)
• struct stm32_spi(9)
• stm32h7_spi_get_fifo_size(9)
• stm32f4_spi_get_bpw_mask(9)
• stm32f7_spi_get_bpw_mask(9)
• stm32h7_spi_get_bpw_mask(9)
• stm32mp25_spi_get_bpw_mask(9)
• stm32_spi_prepare_mbr(9)
• stm32h7_spi_prepare_fthlv(9)
• stm32f4_spi_write_tx(9)
• stm32f7_spi_write_tx(9)
• stm32h7_spi_write_txfifo(9)
• stm32f4_spi_read_rx(9)
• stm32f7_spi_read_rx(9)
• stm32h7_spi_read_rxfifo(9)
• stm32_spi_enable(9)
• stm32fx_spi_disable(9)
• stm32h7_spi_disable(9)
• stm32_spi_can_dma(9)
• stm32fx_spi_irq_event(9)
• stm32fx_spi_irq_thread(9)
• stm32h7_spi_irq_thread(9)
• stm32_spi_prepare_msg(9)
• stm32fx_spi_dma_tx_cb(9)
• stm32_spi_dma_rx_cb(9)
• stm32_spi_dma_config(9)
• stm32fx_spi_transfer_one_irq(9)
• stm32h7_spi_transfer_one_poll(9)
• stm32h7_spi_transfer_one_irq(9)
• stm32fx_spi_transfer_one_dma_start(9)
• stm32f7_spi_transfer_one_dma_start(9)
• stm32h7_spi_transfer_one_dma_start(9)
• stm32_spi_transfer_one_dma(9)
• stm32f4_spi_set_bpw(9)
• stm32f7_spi_set_bpw(9)
• stm32h7_spi_set_bpw(9)
• stm32_spi_set_mbr(9)
• stm32_spi_communication_type(9)
• stm32fx_spi_set_mode(9)
• stm32h7_spi_set_mode(9)
• stm32h7_spi_data_idleness(9)
• stm32h7_spi_number_of_data(9)
• stm32_spi_transfer_one_setup(9)
• stm32_spi_can_poll(9)
• stm32_spi_transfer_one(9)
• stm32_spi_unprepare_msg(9)
• stm32fx_spi_config(9)
• stm32h7_spi_config(9)

okay bye bestie 🫶 — source/version: ./drivers/spi, date: October 2026, page: stm32_spi_pr...dma_chaining(9). periodt 💖