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r335527: Add spi(8), a utility for communicating with a device on a SPI bus from userland, conceptually similar to what i2c(8) provides for i2c devices. Submitted by: Bob Frazier Differential Revision: https://reviews.freebsd.org/D15029 r335529: Eliminate gcc "shadowed declaration" warnings by using idx rather than index as a variable name. r335593: Add an example for displaying the manufacturer and size info from a standard spiflash chip.