SPI: Add SPI controller driver for the Atheros AR71XX/AR724X/AR913X SoCs

The Atheros AR71XX/AR724X/AR913X SoCs have a built-in SPI controller. This
patch implements a driver for that.

Signed-off-by: Gabor Juhos <[email protected]>
Cc: David Brownell <[email protected]>
Cc: [email protected]
Acked-by: Grant Likely <[email protected]>
Cc: [email protected]
Cc: Imre Kaloz <[email protected]>
Cc: Luis R. Rodriguez <[email protected]>
Cc: Cliff Holden <[email protected]>
Cc: Kathy Giori <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/1960/
Signed-off-by: Ralf Baechle <[email protected]>
4 files changed