linux_spi.txt

Linux SPI driver

Slides:

- 2017, Groking the Linux SPI Subsystem: http://events17.linuxfoundation.org/sites/events/files/slides/Groking%20the%20Linux%20SPI%20Subsystem.pdf
- 2014, What’s going on with SPI?: https://elinux.org/images/2/20/Whats_going_on_with_SPI--mark_brown.pdf

Some reference:

- Overview of Linux kernel SPI support: https://www.kernel.org/doc/Documentation/spi/spi-summary
- The Linux driver implementer’s API guide » Serial Peripheral Interface (SPI): https://www.kernel.org/doc/html/v4.15/driver-api/spi.html
- SPI (Serial Peripheral Interface) busses: https://www.kernel.org/doc/Documentation/devicetree/bindings/spi/spi-bus.txt
- drivers/spi/spi-xxx.c

Some note
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1. delay_usecs in struct spi_transfer/spi_message

   - https://www.ptt.cc/bbs/LinuxDev/M.1338976035.A.DE6.html