SPI: MIPS: lantiq: add FALCON spi driver

The external bus unit (EBU) found on the FALCON SoC has spi emulation that is
designed for serial flash access. This driver has only been tested with m25p80
type chips. The hardware has no support for other types of spi peripherals.

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: spi-devel-general@lists.sourceforge.net
Cc: linux-mips@linux-mips.org
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Patchwork: https://patchwork.linux-mips.org/patch/3844/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index cd2fe350e724..b18abf31fd08 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -144,6 +144,15 @@ config SPI_EP93XX
           This enables using the Cirrus EP93xx SPI controller in master
           mode.
 
+config SPI_FALCON
+        tristate "Falcon SPI controller support"
+        depends on SOC_FALCON
+        help
+          The external bus unit (EBU) found on the FALC-ON SoC has SPI
+          emulation that is designed for serial flash access. This driver
+          has only been tested with m25p80 type chips. The hardware has no
+          support for other types of SPI peripherals.
+
 config SPI_GPIO
         tristate "GPIO-based bitbanging SPI Master"
         depends on GENERIC_GPIO