mmc: dw_mmc: clear IDSTS register when initialize IDMAC (fc79a4d6) · Commits · 戴 / test

If pending interrupt for IDMAC exists when initialize IDMAC, it will call interrupt handler unnecessarily. Signed-off-by:

drivers/mmc/host/dw_mmc.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,11 @@
		#define DW_MCI_DMA_THRESHOLD 16

		#ifdef CONFIG_MMC_DW_IDMAC
		#define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI \| SDMMC_IDMAC_INT_NI \| \
		SDMMC_IDMAC_INT_CES \| SDMMC_IDMAC_INT_DU \| \
		SDMMC_IDMAC_INT_FBE \| SDMMC_IDMAC_INT_RI \| \
		SDMMC_IDMAC_INT_TI)

		struct idmac_desc {
		u32 des0; /* Control Descriptor */
		#define IDMAC_DES0_DIC BIT(1)
		@@ -433,6 +438,7 @@ static int dw_mci_idmac_init(struct dw_mci *host)
		mci_writel(host, BMOD, SDMMC_IDMAC_SWRESET);

		/* Mask out interrupts - get Tx & Rx complete only */
		mci_writel(host, IDSTS, IDMAC_INT_CLR);
		mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI \| SDMMC_IDMAC_INT_RI \|
		SDMMC_IDMAC_INT_TI);