spi: add support for ARM PL022 SPI controller
This adds support for the ARM PL022 SPI controller for the standard
variant (0x00041022) which has a 16bit wide and 8 locations deep TX/RX
FIFO.
A few parts were borrowed from the Linux kernel driver.
Cc: Armando Visconti <armando.visconti@st.com>
Cc: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index dcd719f..7d4d47d 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -125,6 +125,14 @@
to access the SPI NOR flash, MMC-over-SPI on platforms based on
Microchip PIC32 family devices.
+config PL022_SPI
+ bool "ARM AMBA PL022 SSP controller driver"
+ depends on ARM
+ help
+ This selects the ARM(R) AMBA(R) PrimeCell PL022 SSP
+ controller. If you have an embedded system with an AMBA(R)
+ bus and a PL022 controller, say Y or M here.
+
config RENESAS_RPC_SPI
bool "Renesas RPC SPI driver"
depends on RCAR_GEN3