Disables the DMA controller and performs a reset during initialization.

zephyrproject-rtos · Jan 4, 2025 · 5c8a478 · 5c8a478
1 parent 7ebb593
commit 5c8a478
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/drivers/dma/dma_sam0.c b/drivers/dma/dma_sam0.c
@@ -413,6 +413,12 @@ static int dma_sam0_init(const struct device *dev)
 	PM->APBBMASK.bit.DMAC_ = 1;
 #endif
 
+	/* Reset the DMA controller */
+	DMAC->CTRL.bit.DMAENABLE = 0;
+	DMAC->CTRL.bit.CRCENABLE = 0;
+	DMAC->CTRL.bit.SWRST = 1;
+	while (DMAC->CTRL.bit.SWRST);
+
 	/* Set up the descriptor and write back addresses */
 	DMA_REGS->BASEADDR.reg = (uintptr_t)&data->descriptors;
 	DMA_REGS->WRBADDR.reg = (uintptr_t)&data->descriptors_wb;