STRUCT PCH_SPI_DATA(9)

struct pch_spi_data(9) 💅✨

okay so bestie, this is the Kernel API Manual page for struct pch_spi_data(9) — literally the struct that holds the SPI channel specific details. no cap, it's giving “driver state goes here” energy, and we're gonna go through every single member because we do not skip in this house. 💖

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🌸 NAME 🌸

struct pch_spi_data — Holds the SPI channel specific details. That's the whole vibe: channel-specific details, held. iconic. 💅

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✨ SYNOPSIS ✨

here's the struct in all its glory, verbatim, character for character — do not touch, just admire:

struct pch_spi_data {
    void __iomem *io_remap_addr;
    unsigned long io_base_addr;
    struct spi_controller *host;
    struct work_struct work;
    wait_queue_head_t wait;
    u8 transfer_complete;
    u8 bcurrent_msg_processing;
    spinlock_t lock;
    struct list_head queue;
    u8 status;
    u32 bpw_len;
    u8 transfer_active;
    u32 tx_index;
    u32 rx_index;
    u16 *pkt_tx_buff;
    u16 *pkt_rx_buff;
    u8 n_curnt_chip;
    struct spi_device *current_chip;
    struct spi_message *current_msg;
    struct spi_transfer *cur_trans;
    struct pch_spi_board_data *board_dat;
    struct platform_device  *plat_dev;
    int ch;
    struct pch_spi_dma_ctrl dma;
    int use_dma;
    u8 irq_reg_sts;
    int save_total_len;
};

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🫶 Members 🫶

okay bestie, member-by-member tour, no skipping, we respect the whole struct in this house:

• io_remap_addr — The remapped PCI base address. 💅
• io_base_addr — Base address.
• host — Pointer to the SPI controller structure.
• work — Reference to work queue handler.
• wait — Wait queue for waking up upon receiving an interrupt.
• transfer_complete — Status of SPI Transfer.
• bcurrent_msg_processing — Status flag for message processing.
• lock — Lock for protecting this structure.
• queue — SPI Message queue.
• status — Status of the SPI driver.
• bpw_len — Length of data to be transferred in bits per word.
• transfer_active — Flag showing active transfer.
• tx_index — Transmit data count; for bookkeeping during transfer.
• rx_index — Receive data count; for bookkeeping during transfer.
• pkt_tx_buff — Buffer for data to be transmitted.
• pkt_rx_buff — Buffer for received data.
• n_curnt_chip — The chip number that this SPI driver currently operates on.
• current_chip — Reference to the current chip that this SPI driver currently operates on.
• current_msg — The current message that this SPI driver is handling.
• cur_trans — The current transfer that this SPI driver is handling.
• board_dat — Reference to the SPI device data structure.
• plat_dev — platform_device structure.
• ch — SPI channel number.
• dma — Local DMA information.
• use_dma — True if DMA is to be used.
• irq_reg_sts — Status of IRQ registration.
• save_total_len — Save length while data is being transferred.

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🌈 SEE ALSO 🌈

go look at these, bestie — the related kernel file and API pages are all right here:

• Kernel file ./drivers/spi/spi-topcliff-pch.c struct
• pch_spi_board_data(9)
• pch_spi_writereg(9)
• pch_spi_readreg(9)
• pch_spi_clear_fifo(9)
• pch_spi_handler(9)
• pch_spi_set_baud_rate(9)
• pch_spi_set_bits_per_word(9)
• pch_spi_setup_transfer(9)
• pch_spi_reset(9)

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k bye bestie — this iconic page is from the Kernel API Manual, the source/version footer says ./drivers/spi, it's dated October 2026, and it's literally the struct pch_spi_data(9) page. slay, stay hydrated, read your manpages. 💅✨🫶