If pending interrupt for IDMAC exists when initialize IDMAC, it will
call interrupt handler unnecessarily.
Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
---
Changes from previous patch v1:
- Change subject and contents of commit
- Define IDMAC_INT_CLR macro to clear IDSTS register
- It moved to clear IDSTS register in dw_mci_idmac_init()
drivers/mmc/host/dw_mmc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index bc3a1bc..4abb3f8 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -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);
--
1.8.1.2
--
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