Commit 94847be1 authored by Petr Hlineny's avatar Petr Hlineny Committed by Carles Cufi
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drivers/disk: sdmmc stm32: Enable SDMMC Internal DMA on STM32L4plus mcu 



STM32L4plus mcu has SDMMC internal DMA which works without any
configuration and it's handled by SDMMC HAL driver. This commit adds
option to enable it and use it.

Signed-off-by: default avatarPetr Hlineny <development@hlineny.cz>
parent 2c386316

drivers/disk/sdmmc_stm32.c

+2 −2
Original line number Diff line number Diff line
@@ -326,7 +326,7 @@ static int stm32_sdmmc_access_read(struct disk_info *disk, uint8_t *data_buf, 


	k_sem_take(&priv->thread_lock, K_FOREVER);



#if STM32_SDMMC_USE_DMA

#if STM32_SDMMC_USE_DMA || IS_ENABLED(DT_PROP(DT_DRV_INST(0), idma))

	err = HAL_SD_ReadBlocks_DMA(&priv->hsd, data_buf, start_sector,

				num_sector);

#else
@@ -365,7 +365,7 @@ static int stm32_sdmmc_access_write(struct disk_info *disk, 


	k_sem_take(&priv->thread_lock, K_FOREVER);



#if STM32_SDMMC_USE_DMA

#if STM32_SDMMC_USE_DMA || IS_ENABLED(DT_PROP(DT_DRV_INST(0), idma))

	err = HAL_SD_WriteBlocks_DMA(&priv->hsd, (uint8_t *)data_buf, start_sector,

				 num_sector);

#else

dts/arm/st/l4/stm32l4r5.dtsi

+1 −0
Original line number Diff line number Diff line
@@ -343,6 +343,7 @@ 
				 <&rcc STM32_SRC_HSI48 CLK48_SEL(0)>;

			resets = <&rctl STM32_RESET(AHB2, 22U)>;

			interrupts = <49 0>;

			idma;

			status = "disabled";

		};

dts/bindings/mmc/st,stm32-sdmmc.yaml

+7 −0
Original line number Diff line number Diff line
@@ -39,6 +39,13 @@ properties: 
      - 4

      - 8



  idma:

    type: boolean

    description: |

      SDMMC device has an internal DMA. Internal DMA doesn't require any additional

      configuration using "dmas" property.

      Delete this property to use interrupt driven mode.



  dmas:

    description: |

      Optional DMA channel specifier. If DMA should be used, specifier should

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