spi_w8r16be(9)

hiii bestie 💖 this is the spi_w8r16be(9) page from the Kernel API Manual, and we're gonna make it make sense together. No cap.

✨ NAME ✨

spi_w8r16be — SPI synchronous 8 bit write followed by 16 bit big-endian read. That's the whole vibe: write 8 bits, then read 16 bits big-endian. 💅

🌸 SYNOPSIS 🌸

ssize_t spi_w8r16be (struct spi_device *spi , u8 cmd );

🎀 ARGUMENTS 🎀

• spi — device with which data will be exchanged. literally the device bestie is talking to.
• cmd — command to be written before data is read back. writes first, then reads back.

😴 CONTEXT 😴

can sleep — yes bestie, it can sleep. 😴 Callable only from contexts that can sleep.

🦋 DESCRIPTION 🦋

Okay so this function is similar to spi_w8r16, with the exception that it will convert the read 16 bit data word from big-endian to native endianness. so it's the big-endian-to-native-endianness remix of spi_w8r16. 🔥

Callable only from contexts that can sleep. that's the rule, bestie — no sneaky calls from places that can't sleep. 🙈

💜 RETURN 💜

You get the (unsigned) sixteen bit number returned by the device in CPU endianness, or else a negative error code. That's the tea. ☕

🔥 SEE ALSO 🔥

Kernel file: ./include/linux/spi/spi.h — plus the whole squad:

• struct spi_statistics(9)
• struct spi_delay(9)
• struct spi_device(9)
• struct spi_driver(9)
• spi_unregister_driver(9)
• module_spi_driver(9)
• struct spi_controller(9)
• struct spi_res(9)
• struct spi_transfer(9)
• struct spi_message(9)
• spi_message_init_with_transfers(9)
• spi_is_bpw_supported(9)
• spi_bpw_to_bytes(9)
• spi_controller_xfer_timeout(9)
• struct spi_replaced_transfers(9)
• spi_sync_transfer(9)
• spi_write(9)
• spi_read(9)
• spi_w8r8(9)
• spi_w8r16(9)
• struct spi_board_info(9)

mwah 💋 this page's source/version is ./include/linux/spi, dated October 2026, and it's the spi_w8r16be(9) manual page — bye bestie! 🫶✨