drivers: i2s: add sai support for stm32u5xx

This PR adds initial sai support for STM32u5xx

Signed-off-by: Mario Paja <[email protected]>

drivers/i2s/CMakeLists.txt

@@ -14,3 +14,4 @@ zephyr_library_sources_ifdef(CONFIG_I2S_NRFX		i2s_nrfx.c)
 zephyr_library_sources_ifdef(CONFIG_I2S_MCUX_SAI	i2s_mcux_sai.c)
 zephyr_library_sources_ifdef(CONFIG_I2S_ESP32		i2s_esp32.c)
 zephyr_library_sources_ifdef(CONFIG_I2S_TEST		i2s_test.c)
+zephyr_library_sources_ifdef(CONFIG_I2S_STM32_SAI   i2s_stm32_sai.c)

drivers/i2s/Kconfig.stm32

@@ -14,6 +14,20 @@ menuconfig I2S_STM32
 	  Enable I2S support on the STM32 family of processors.
 	  (Tested on the STM32F4 & STM32H7 series)
 
+menuconfig I2S_STM32_SAI
+	bool "STM32 MCU I2S controller driver"
+	default y
+	depends on DT_HAS_ST_STM32_SAI_ENABLED
+	depends on SOC_SERIES_STM32U5X
+	select CACHE_MANAGEMENT if CPU_HAS_DCACHE
+	select DMA
+	select USE_STM32_HAL_DMA
+	select USE_STM32_HAL_DMA_EX
+	select USE_STM32_HAL_SAI
+	select USE_STM32_LL_DLYB if (SOC_SERIES_STM32H5X || SOC_SERIES_STM32U5X)
+	help
+	  Enable SAI support on the STM32U5 family of processors.
+
 if I2S_STM32
 
 config I2S_STM32_RX_BLOCK_COUNT
@@ -25,3 +39,15 @@ config I2S_STM32_TX_BLOCK_COUNT
 	default 4
 
 endif # I2S_STM32
+
+if I2S_STM32_SAI
+
+config I2S_STM32_SAI_BLOCK_COUNT
+	int "SAI queue length"
+	default 4
+
+config I2S_STM32_SAI_USE_DMA
+	bool "SAI DMA Transfer enable"
+	default n
+
+endif # I2S_STM32_SAI

drivers/i2s/i2s_esp32.c

@@ -19,7 +19,7 @@
 #include <esp_clk_tree.h>
 #include <hal/i2s_hal.h>
 
-LOG_MODULE_REGISTER(i2s_esp32, CONFIG_I2S_LOG_LEVEL);
+
 
 #if !SOC_GDMA_SUPPORTED
 #error "Only SoCs with GDMA peripheral are supported!"