mirror of
https://github.com/torvalds/linux.git
synced 2026-10-07 22:37:45 -04:00
Thor Thayer
8eee6b9dd3
Some SPI masters require slave selection before the transfer
can begin [1]. The SPI framework currently selects the chip using
either 1) the internal CS mechanism or 2) the GPIO CS, but not both.
This patch adds a new master->flags define to indicate both the GPIO
CS and the internal chip select mechanism should be used.
Tested On:
Altera CycloneV development kit
Compile tested for build errors on x86_64 (allyesconfigs)
[1] DesignWare dw_apb_ssi Databook, Version 3.20a (page 39)
Signed-off-by: Thor Thayer <[email protected]>
Signed-off-by: Mark Brown <[email protected]>