i2c: stm32: Add config option to enable DMA support

Add option to enable DMA support

Signed-off-by: Simon Gilbert <[email protected]>

Author: sgilbert182

drivers/i2c/Kconfig.stm32

@@ -55,4 +55,13 @@ config I2C_STM32_V2_TIMING
 	help
 	  Enable STM32 driver bus to calculate the Timing.
 
+config I2C_STM32_V2_DMA
+	bool "DMA support"
+	depends on I2C_STM32_V2
+	select DMA
+	select CACHE_MANAGEMENT if CPU_HAS_DCACHE
+	select EXPERIMENTAL
+	help
+	  Enable DMA support for the STM32 I2C driver.
+
 endif # I2C_STM32