drivers: adc: stm32: driver now agnostic of actual dma name

Previously the STM32 DMA driver was dependent on a very specific
name for the DMA in the DTS. This hidden requirement has caused
a bit of confusion. This commit changes the driver to instead
always use the first DMA listed in the ADC node's dma property.

Should fix: #65387

Signed-off-by: Hein Wessels <heinwessels93@gmail.com>

drivers/adc/adc_stm32.c

@@ -1521,39 +1521,39 @@ static void adc_stm32_irq_init(void)
 #define ADC_STM32_IRQ_CONFIG(index)
 #define ADC_STM32_IRQ_FUNC(index)					\
 	.irq_cfg_func = adc_stm32_irq_init,
-#define ADC_DMA_CHANNEL(id, dir, DIR, src, dest)
+#define ADC_DMA_CHANNEL(id, src, dest)
 
 #elif defined(CONFIG_ADC_STM32_DMA) /* !CONFIG_ADC_STM32_SHARED_IRQS */
 
-#define ADC_DMA_CHANNEL_INIT(index, name, dir_cap, src_dev, dest_dev)			\
+#define ADC_DMA_CHANNEL_INIT(index, src_dev, dest_dev)					\
 	.dma = {									\
-		.dma_dev = DEVICE_DT_GET(STM32_DMA_CTLR(index, name)),			\
-		.channel = DT_INST_DMAS_CELL_BY_NAME(index, name, channel),		\
+		.dma_dev = DEVICE_DT_GET(DT_INST_DMAS_CTLR_BY_IDX(index, 0)),		\
+		.channel = STM32_DMA_SLOT_BY_IDX(index, 0, channel),			\
 		.dma_cfg = {								\
-			.dma_slot = STM32_DMA_SLOT(index, name, slot),			\
+			.dma_slot = STM32_DMA_SLOT_BY_IDX(index, 0, slot),		\
 			.channel_direction = STM32_DMA_CONFIG_DIRECTION(		\
-				STM32_DMA_CHANNEL_CONFIG(index, name)),			\
+				STM32_DMA_CHANNEL_CONFIG_BY_IDX(index, 0)),		\
 			.source_data_size = STM32_DMA_CONFIG_##src_dev##_DATA_SIZE(	\
-				STM32_DMA_CHANNEL_CONFIG(index, name)),			\
+				STM32_DMA_CHANNEL_CONFIG_BY_IDX(index, 0)),		\
 			.dest_data_size = STM32_DMA_CONFIG_##dest_dev##_DATA_SIZE(	\
-				STM32_DMA_CHANNEL_CONFIG(index, name)),			\
+				STM32_DMA_CHANNEL_CONFIG_BY_IDX(index, 0)),		\
 			.source_burst_length = 1,       /* SINGLE transfer */		\
 			.dest_burst_length = 1,         /* SINGLE transfer */		\
 			.channel_priority = STM32_DMA_CONFIG_PRIORITY(			\
-				STM32_DMA_CHANNEL_CONFIG(index, name)),			\
+				STM32_DMA_CHANNEL_CONFIG_BY_IDX(index, 0)),		\
 			.dma_callback = dma_callback,					\
 			.block_count = 2,						\
 		},									\
 		.src_addr_increment = STM32_DMA_CONFIG_##src_dev##_ADDR_INC(		\
-			STM32_DMA_CHANNEL_CONFIG(index, name)),				\
+			STM32_DMA_CHANNEL_CONFIG_BY_IDX(index, 0)),			\
 		.dst_addr_increment = STM32_DMA_CONFIG_##dest_dev##_ADDR_INC(		\
-			STM32_DMA_CHANNEL_CONFIG(index, name)),				\
+			STM32_DMA_CHANNEL_CONFIG_BY_IDX(index, 0)),			\
 	}
 
-#define ADC_DMA_CHANNEL(id, dir, DIR, src, dest)					\
-	COND_CODE_1(DT_INST_DMAS_HAS_NAME(id, dir),					\
-		    (ADC_DMA_CHANNEL_INIT(id, dir, DIR, src, dest)),			\
-		    (EMPTY))
+#define ADC_DMA_CHANNEL(id, src, dest)							\
+	COND_CODE_1(DT_INST_DMAS_HAS_IDX(id, 0),					\
+			(ADC_DMA_CHANNEL_INIT(id, src, dest)),				\
+			(/* Required for other adc instances without dma */))
 
 #define ADC_STM32_IRQ_CONFIG(index)					\
 static void adc_stm32_cfg_func_##index(void){ EMPTY }
@@ -1572,7 +1572,7 @@ static void adc_stm32_cfg_func_##index(void)				\
 }
 #define ADC_STM32_IRQ_FUNC(index)					\
 	.irq_cfg_func = adc_stm32_cfg_func_##index,
-#define ADC_DMA_CHANNEL(id, dir, DIR, src, dest)
+#define ADC_DMA_CHANNEL(id, src, dest)
 
 #endif /* CONFIG_ADC_STM32_DMA && CONFIG_ADC_STM32_SHARED_IRQS */
 
@@ -1605,7 +1605,7 @@ static struct adc_stm32_data adc_stm32_data_##index = {			\
 	ADC_CONTEXT_INIT_TIMER(adc_stm32_data_##index, ctx),		\
 	ADC_CONTEXT_INIT_LOCK(adc_stm32_data_##index, ctx),		\
 	ADC_CONTEXT_INIT_SYNC(adc_stm32_data_##index, ctx),		\
-	ADC_DMA_CHANNEL(index, dmamux, NULL, PERIPHERAL, MEMORY)	\
+	ADC_DMA_CHANNEL(index, PERIPHERAL, MEMORY)			\
 };									\
 									\
 PM_DEVICE_DT_INST_DEFINE(index, adc_stm32_pm_action);			\