spi: imx: add lpspi bus driver
This patch adds lpspi driver to support new i.MX products which use
lpspi instead of ecspi.
The lpspi can continue operating in stop mode when an appropriate
clock is available. It is also designed for low CPU overhead with
DMA offloading of FIFO register accesses.
Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Reviewed-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index b799547..91ae180 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -264,6 +264,12 @@
has only been tested with m25p80 type chips. The hardware has no
support for other types of SPI peripherals.
+config SPI_FSL_LPSPI
+ tristate "Freescale i.MX LPSPI controller"
+ depends on ARCH_MXC || COMPILE_TEST
+ help
+ This enables Freescale i.MX LPSPI controllers in master mode.
+
config SPI_GPIO
tristate "GPIO-based bitbanging SPI Master"
depends on GPIOLIB || COMPILE_TEST