diff options
Diffstat (limited to 'patches.tizen/0436-mmc-dw_mmc-clear-IDSTS-register-when-initialize-IDMA.patch')
| -rw-r--r-- | patches.tizen/0436-mmc-dw_mmc-clear-IDSTS-register-when-initialize-IDMA.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/patches.tizen/0436-mmc-dw_mmc-clear-IDSTS-register-when-initialize-IDMA.patch b/patches.tizen/0436-mmc-dw_mmc-clear-IDSTS-register-when-initialize-IDMA.patch new file mode 100644 index 00000000000..251cd10898d --- /dev/null +++ b/patches.tizen/0436-mmc-dw_mmc-clear-IDSTS-register-when-initialize-IDMA.patch @@ -0,0 +1,45 @@ +From 356b0529db5f17e6716c23b3d17c108a2775171b Mon Sep 17 00:00:00 2001 +From: Joonyoung Shim <jy0922.shim@samsung.com> +Date: Fri, 26 Apr 2013 15:35:22 +0900 +Subject: [PATCH 0436/1302] mmc: dw_mmc: clear IDSTS register when initialize + IDMAC + +If pending interrupt for IDMAC exists when initialize IDMAC, it will +call interrupt handler unnecessarily. + +Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> +Acked-by: Seungwon Jeon <tgih.jun@samsung.com> +Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com> +Signed-off-by: Chris Ball <cjb@laptop.org> +Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> +--- + 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 0652690..b10e5e1 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); + +-- +1.8.3.2 + |