Jarkko? Tony? On Tue, 21 Apr 2009 13:09:22 +0530 "Gadiyar, Anand" <[email protected]> wrote:
> 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) { -- -- Pierre Ossman WARNING: This correspondence is being monitored by the Swedish government. Make sure your server uses encryption for SMTP traffic and consider using PGP for end-to-end encryption.
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