* Pierre Ossman <pierre@xxxxxxxxx> [090428 12:38]:
> Jarkko? Tony?
Hmm, we haven't heard from Jarkko for a while.. Adrian, care to take
a look at this patch?
Tony
> On Tue, 21 Apr 2009 13:09:22 +0530
> "Gadiyar, Anand" <gadiyar@xxxxxx> wrote:
>
> > From: Anand Gadiyar <gadiyar@xxxxxx>
> >
> > 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 <gadiyar@xxxxxx>
> > Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
> > Acked-by: Kishore Kadiyala <kishore.kadiyala@xxxxxx>
> > ---
> > 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
>
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