spi: new controller driver for efm32 SoCs

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 89cbbab..f84a77c 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -157,6 +157,13 @@
 	help
 	  SPI master controller for DaVinci/DA8x/OMAP-L/AM1x SPI modules.
 
+config SPI_EFM32
+	tristate "EFM32 SPI controller"
+	depends on OF && ARM && (ARCH_EFM32 || COMPILE_TEST)
+	select SPI_BITBANG
+	help
+	  Driver for the spi controller found on Energy Micro's EFM32 SoCs.
+
 config SPI_EP93XX
 	tristate "Cirrus Logic EP93xx SPI controller"
 	depends on ARCH_EP93XX