From: Anand Gadiyar <[email protected]> OMAP: HSMMC: Do not enable buffer ready interrupt if using DMA
This considerably reduces the number of interrupts during a transfer and ought to result in some power saving. Signed-off-by: Anand Gadiyar <[email protected]> Signed-off-by: Santosh Shilimkar <[email protected]> Acked-by: Kishore Kadiyala <[email protected]> --- diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index e62a22a..2d83807 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -70,6 +70,8 @@ #define DTO_MASK 0x000F0000 #define DTO_SHIFT 16 #define INT_EN_MASK 0x307F0033 +#define BWR_ENABLE (1 << 4) +#define BRR_ENABLE (1 << 5) #define INIT_STREAM (1 << 1) #define DP_SELECT (1 << 21) #define DDIR (1 << 4) @@ -241,7 +243,12 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd, */ OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); OMAP_HSMMC_WRITE(host->base, ISE, INT_EN_MASK); - OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); + + if (host->use_dma) + OMAP_HSMMC_WRITE(host->base, IE, + INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE)); + else + OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); host->response_busy = 0; if (cmd->flags & MMC_RSP_PRESENT) { -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
