stm32_spi_transfer_one(9)

💖 stm32_spi_transfer_one(9) — Kernel API Manual 💖

Okay bestie, welcome to the Kernel API Manual page for stm32_spi_transfer_one(9). It's literally the one-job girlie of SPI transfers: transfer a single spi_transfer. ✨

🌸 NAME 🌸

stm32_spi_transfer_one — transfer a single spi_transfer 🎀

🦋 SYNOPSIS 🦋

int stm32_spi_transfer_one (struct spi_controller *ctrl , struct
       spi_device *spi_dev , struct spi_transfer *transfer );

✨ ARGUMENTS ✨

• ctrl — controller interface: the controller-side main character of this whole operation. 👑
• spi_dev — pointer to the spi device. The device in question, no cap. 🫶
• transfer — pointer to spi transfer. This is the single transfer being handled. 💅

🔥 DESCRIPTION 🔥

It must return 0 if the transfer is finished, or 1 if the transfer is still in progress. That's the rule — the return value is the vibe check: 0 = finished, 1 = still in progress. 😭✨

🌈 SEE ALSO 🌈

Kernel file: ./drivers/spi/spi-stm32.c — the source file for this whole STM32 SPI universe. 💖

🧚 structs & friends

• struct stm32_spi_reg(9)
• struct stm32_spi_regspec(9)
• struct stm32_spi_cfg(9)
• struct stm32_spi(9)

⭐ functions

• 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_prepare_rx_dma_mdma_chaining(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_unprepare_msg(9)
• stm32fx_spi_config(9)
• stm32h7_spi_config(9)

Kisses and kernel crumbs 🍓 — source/version info is ./drivers/spi, date is October 2026, and this iconic page is literally stm32_spi_transfer_one(9). 💜✨