stm32g4: add support for DMA (DMAMUX)

arch/arm/src/stm32/Kconfig

@@ -1927,6 +1927,19 @@ config STM32_STM32F469
 config STM32_STM32G4XXX
 	bool
 	default n
+	select STM32_HAVE_DMAMUX
+
+config STM32_STM32G4_CAT2
+	bool
+	default n
+
+config STM32_STM32G4_CAT3
+	bool
+	default n
+
+config STM32_STM32G4_CAT4
+	bool
+	default n
 
 config STM32_STM32G4XXK
 	bool
@@ -1960,6 +1973,7 @@ config STM32_STM32G43XX
 	bool
 	default n
 	select STM32_STM32G4XXX
+	select STM32_STM32G4_CAT2
 	select ARCH_CORTEXM4
 	select ARCH_HAVE_FPU
 	select STM32_HAVE_ADC2
@@ -2030,6 +2044,7 @@ config STM32_STM32G47XX
 	bool
 	default n
 	select STM32_STM32G4XXX
+	select STM32_STM32G4_CAT3
 	select ARCH_CORTEXM4
 	select ARCH_HAVE_FPU
 	select STM32_HAVE_ADC2
@@ -2174,6 +2189,10 @@ config STM32_HAVE_DMA2_CHAN678
 	bool
 	default n
 
+config STM32_HAVE_DMAMUX
+	bool
+	default n
+
 config STM32_HAVE_UCPD
 	bool
 	default n
@@ -2758,14 +2777,22 @@ config STM32_CRYP
 config STM32_DMA1
 	bool "DMA1"
 	default n
+	select STM32_DMA
 	select ARCH_DMA
 
 config STM32_DMA2
 	bool "DMA2"
 	default n
+	select STM32_DMA
 	select ARCH_DMA
 	depends on !STM32_VALUELINE || (STM32_VALUELINE && STM32_HIGHDENSITY)
 
+config STM32_DMAMUX1
+	bool "DMAMUX1"
+	default n
+	depends on STM32_HAVE_DMAMUX
+	select STM32_DMAMUX
+
 config STM32_DAC1
 	bool "DAC1"
 	default n
@@ -3286,6 +3313,12 @@ config STM32_SDADC
 config STM32_DAC
 	bool
 
+config STM32_DMA
+	bool
+
+config STM32_DMAMUX
+	bool
+
 config STM32_SPI
 	bool
 

arch/arm/src/stm32/Make.defs

@@ -78,11 +78,15 @@ endif
 
 CHIP_CSRCS  = stm32_allocateheap.c stm32_start.c stm32_rcc.c stm32_lse.c
 CHIP_CSRCS += stm32_lsi.c stm32_gpio.c stm32_exti_gpio.c stm32_flash.c
-CHIP_CSRCS += stm32_irq.c stm32_dma.c stm32_lowputc.c
+CHIP_CSRCS += stm32_irq.c stm32_lowputc.c
 CHIP_CSRCS += stm32_serial.c stm32_spi.c stm32_i2s.c stm32_sdio.c stm32_tim.c
 CHIP_CSRCS += stm32_waste.c stm32_ccm.c stm32_uid.c stm32_capture.c
 CHIP_CSRCS += stm32_dfumode.c
 
+ifeq ($(CONFIG_STM32_DMA),y)
+CHIP_CSRCS += stm32_dma.c
+endif
+
 ifeq ($(CONFIG_TIMER),y)
 CHIP_CSRCS += stm32_tim_lowerhalf.c
 endif

arch/arm/src/stm32/stm32_dma.c

@@ -37,7 +37,11 @@
  */
 
 #if defined(CONFIG_STM32_HAVE_IP_DMA_V1)
+#  if defined(CONFIG_STM32_HAVE_DMAMUX)
+#    include "stm32_dma_v1mux.c"
+#  else
 #    include "stm32_dma_v1.c"
+#  endif
 #elif defined(CONFIG_STM32_HAVE_IP_DMA_V2)
 #  include "stm32_dma_v2.c"
 #endif

arch/arm/src/stm32/stm32_dma.h

@@ -47,6 +47,10 @@
 
 #include "hardware/stm32_dma.h"
 
+#ifdef CONFIG_STM32_HAVE_DMAMUX
+#  include "hardware/stm32_dmamux.h"
+#endif
+
 /* These definitions provide the bit encoding of the 'status' parameter
  * passed to the DMA callback function (see dma_callback_t).
  */