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Author SHA1 Message Date
Andrew Leech 30501d3f54 drivers, stm32: Support SPI/QSPI flash chips over 16MB. 
With a SPI flash that has more than 16MB, 32-bit addressing is required
rather than the standard 24-bit.  This commit adds support for 32-bit
addressing so that the SPI flash commands (read/write/erase) are selected
automatically depending on the size of the address being used at each
operation.
 2020-01-30 13:18:38 +11:00
Damien George 1da2d45de6 drivers/bus: Add QSPI abstract type with software QSPI implementation. 
A new directory drivers/bus/ is introduced, which can hold implementations
of bus drivers.  A software QSPI implementation is added.
 2018-03-02 23:52:59 +11:00