tree 2bd8429726c0e8bb7dac47a38807fe5cb25035ce
parent b25913b40ee138c35d4c92e55898a365348d5769
author Nick Hawkins <nick.hawkins@hpe.com> 1654723296 -0500
committer Tom Rini <trini@konsulko.com> 1655947805 -0400

spi: gxp_spi: Add GXP SPI controller driver

The GXP supports 3 separate SPI interfaces to accommodate the system
flash, core flash, and other functions. The SPI engine supports variable
clock frequency, selectable 3-byte or 4-byte addressing and a
configurable x1, x2, and x4 command/address/data modes. The memory
buffer for reading and writing ranges between 256 bytes and 8KB. This
driver supports access to the core flash.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>