drivers: spi: Add support SPI driver for Renesas RA6, RA4, RA2

- Add SPI driver support for RA
- RA2A1 not support slave select keeping level so disable it
in Kconfig

Signed-off-by: Tri Nguyen <[email protected]>
Signed-off-by: Thao Luong <[email protected]>
Signed-off-by: Khoa Nguyen <[email protected]>

Author: khoa-nguyen-18

drivers/spi/CMakeLists.txt

@@ -52,6 +52,7 @@ zephyr_library_sources_ifdef(CONFIG_SPI_AMBIQ_BLEIF	spi_ambiq_bleif.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_RPI_PICO_PIO	spi_rpi_pico_pio.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_MCHP_MSS	spi_mchp_mss.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_RENESAS_RA8  spi_b_renesas_ra8.c)
+zephyr_library_sources_ifdef(CONFIG_SPI_RENESAS_RA        spi_renesas_ra.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_RTIO spi_rtio.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_ASYNC spi_signal.c)
 zephyr_library_sources_ifdef(CONFIG_SPI_ITE_IT8XXX2	spi_it8xxx2.c)

drivers/spi/Kconfig

@@ -165,4 +165,6 @@ source "drivers/spi/Kconfig.renesas_ra8"
 
 source "drivers/spi/Kconfig.it8xxx2"
 
+source "drivers/spi/Kconfig.renesas_ra"
+
 endif # SPI

drivers/spi/Kconfig.renesas_ra

@@ -0,0 +1,35 @@
+# Renesas RA Family
+
+# Copyright (c) 2024 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+config SPI_RENESAS_RA
+	bool "Renesas RA SPI"
+	default y
+	depends on DT_HAS_RENESAS_RA_SPI_ENABLED
+	select USE_RA_FSP_SPI
+	select PINCTRL
+	help
+	  Enable Renesas RA SPI Driver.
+
+if SPI_RENESAS_RA
+
+config SPI_INTERRUPT
+	bool "RA MCU SPI Interrupt Support"
+	help
+	  Enable Interrupt support for the SPI Driver of RA family.
+
+config SPI_RA_DTC
+	bool "RA MCU SPI DTC Support"
+	select USE_RA_FSP_DTC
+	help
+	  Enable the SPI DTC mode for SPI instances
+
+config SPI_USE_HW_SS
+	bool "RA MCU SPI Hardware Slave Select support"
+	default y
+	depends on !SOC_SERIES_RA2A1
+	help
+	  Use Slave Select pin instead of software Slave Select.
+
+endif # SPI_RENESAS_RA