spi: Add spi driver for Socionext SynQuacer platform

This patch adds support for controller found on synquacer platforms.
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/Kconfig

@@ -732,6 +732,16 @@ config SPI_SUN6I
 	help
 	  This enables using the SPI controller on the Allwinner A31 SoCs.
 
+config SPI_SYNQUACER
+	tristate "Socionext's SynQuacer HighSpeed SPI controller"
+	depends on ARCH_SYNQUACER || COMPILE_TEST
+	help
+	  SPI driver for Socionext's High speed SPI controller which provides
+	  various operating modes for interfacing to serial peripheral devices
+	  that use the de-facto standard SPI protocol.
+
+	  It also supports the new dual-bit and quad-bit SPI protocol.
+
 config SPI_MXIC
         tristate "Macronix MX25F0A SPI controller"
         depends on SPI_MASTER

drivers/spi/Makefile

@@ -106,6 +106,7 @@ obj-$(CONFIG_SPI_STM32_QSPI) 		+= spi-stm32-qspi.o
 obj-$(CONFIG_SPI_ST_SSC4)		+= spi-st-ssc4.o
 obj-$(CONFIG_SPI_SUN4I)			+= spi-sun4i.o
 obj-$(CONFIG_SPI_SUN6I)			+= spi-sun6i.o
+obj-$(CONFIG_SPI_SYNQUACER)		+= spi-synquacer.o
 obj-$(CONFIG_SPI_TEGRA114)		+= spi-tegra114.o
 obj-$(CONFIG_SPI_TEGRA20_SFLASH)	+= spi-tegra20-sflash.o
 obj-$(CONFIG_SPI_TEGRA20_SLINK)		+= spi-tegra20-slink.o