spi: atcspi200: Add ATCSPI200 SPI controller driver

Add driver for the Andes ATCSPI200 SPI controller.

Signed-off-by: CL Wang <cl634@andestech.com>
Link: https://patch.msgid.link/20251215132349.513843-3-cl634@andestech.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: CL Wang

drivers/spi/Kconfig

@@ -136,6 +136,15 @@ config SPI_AR934X
 	  This enables support for the SPI controller present on the
 	  Qualcomm Atheros AR934X/QCA95XX SoCs.
 
+config SPI_ATCSPI200
+	tristate "Andes ATCSPI200 SPI controller"
+	depends on ARCH_ANDES
+	help
+	  SPI driver for Andes ATCSPI200 SPI controller.
+	  ATCSPI200 controller supports DMA and PIO modes. When DMA
+	  is not available, the driver automatically falls back to
+	  PIO mode.
+
 config SPI_ATH79
 	tristate "Atheros AR71XX/AR724X/AR913X SPI controller driver"
 	depends on ATH79 || COMPILE_TEST

drivers/spi/Makefile

@@ -26,6 +26,7 @@ obj-$(CONFIG_SPI_APPLE)			+= spi-apple.o
 obj-$(CONFIG_SPI_AR934X)		+= spi-ar934x.o
 obj-$(CONFIG_SPI_ARMADA_3700)		+= spi-armada-3700.o
 obj-$(CONFIG_SPI_ASPEED_SMC)		+= spi-aspeed-smc.o
+obj-$(CONFIG_SPI_ATCSPI200)		+= spi-atcspi200.o
 obj-$(CONFIG_SPI_ATMEL)			+= spi-atmel.o
 obj-$(CONFIG_SPI_ATMEL_QUADSPI)		+= atmel-quadspi.o
 obj-$(CONFIG_SPI_AT91_USART)		+= spi-at91-usart.o