ESP32: Add driver support to SPI Master and Slave

This driver was implemented by Dong Heng <dongheng@espressif.com>
and modified to fix coding style by Alan Carvalho de Assis.

arch/xtensa/include/esp32/irq.h

@@ -234,9 +234,9 @@
 #define ESP32_IRQ_CPU_CPU2          (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_CPU_CPU2)
 #define ESP32_IRQ_CPU_CPU3          (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_CPU_CPU3)
 #define ESP32_IRQ_SPI0              (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_SPI0)
-#define ESP32_IRQ_SPI1              (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_SPI1
+#define ESP32_IRQ_SPI1              (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_SPI1)
 #define ESP32_IRQ_SPI2              (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_SPI2)
-#define ESP32_IRQ_SPI3              (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_SPI3
+#define ESP32_IRQ_SPI3              (XTENSA_IRQ_FIRSTPERIPH+ESP32_PERIPH_SPI3)
 
 #define ESP32_IRQ_SREG0             ESP32_IRQ_MAC
 #define ESP32_NIRQS_SREG0           32

arch/xtensa/src/esp32/Kconfig

@@ -81,25 +81,23 @@ config ESP32_SDMMC
 	---help---
 		No yet implemented
 
-config ESP32_SPI0
-	bool "SPI 0"
-	default n
-	depends on EXPERIMENTAL
-	---help---
-		No yet implemented
-
-config ESP32_SPI1
-	bool "SPI 1"
+config ESP32_SPI
+	bool
 	default n
-	depends on EXPERIMENTAL
-	---help---
-		No yet implemented
 
 config ESP32_SPI2
 	bool "SPI 2"
 	default n
-	---help---
-		No yet implemented
+	select ESP32_SPI
+	select ESP32_GPIO_IRQ
+	select SPI
+
+config ESP32_SPI3
+	bool "SPI 3"
+	default n
+	select ESP32_SPI
+	select ESP32_GPIO_IRQ
+	select SPI
 
 config XTENSA_TIMER1
 	bool "Xtensa Timer 1"
@@ -309,4 +307,58 @@ endif # SERIAL_IFLOWCONTROL || SERIAL_OFLOWCONTROL
 endif # ESP32_UART2
 
 endmenu # UART configuration
+
+menu "SPI configuration"
+	depends on ESP32_SPI
+
+if ESP32_SPI2
+
+config ESP32_SPI2_CSPIN
+	int "SPI2 CS Pin"
+	default 13
+	range 0 39
+
+config ESP32_SPI2_CLKPIN
+	int "SPI2 CLK Pin"
+	default 14
+	range 0 39
+
+config ESP32_SPI2_MOSIPIN
+	int "SPI2 MOSI Pin"
+	default 15
+	range 0 39
+
+config ESP32_SPI2_MISOPIN
+	int "SPI2 MISO Pin"
+	default 2
+	range 0 39
+
+endif # ESP32_SPI2
+
+if ESP32_SPI3
+
+config ESP32_SPI3_CSPIN
+	int "SPI3 CS Pin"
+	default 13
+	range 0 39
+
+config ESP32_SPI3_CLKPIN
+	int "SPI3 CLK Pin"
+	default 14
+	range 0 39
+
+config ESP32_SPI3_MOSIPIN
+	int "SPI3 MOSI Pin"
+	default 15
+	range 0 39
+
+config ESP32_SPI3_MISOPIN
+	int "SPI3 MISO Pin"
+	default 2
+	range 0 39
+
+endif # ESP32_SPI3
+
+endmenu # ESP32_SPI
+
 endif # ARCH_CHIP_ESP32

arch/xtensa/src/esp32/Make.defs

@@ -100,6 +100,13 @@ CHIP_CSRCS += esp32_gpio.c esp32_intdecode.c esp32_irq.c esp32_region.c
 CHIP_CSRCS += esp32_timerisr.c
 CHIP_CSRCS += esp32_user.c
 
+ifeq ($(CONFIG_ESP32_SPI),y)
+CHIP_CSRCS += esp32_spi.c
+  ifeq ($(CONFIG_SPI_SLAVE),y)
+    CHIP_CSRCS += esp32_spi_slave.c
+  endif
+endif
+
 # Configuration-dependent ESP32 files
 
 ifeq ($(CONFIG_SMP),y)