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| author | Anand Gadiyar <gadiyar@ti.com> | 2009-09-22 16:44:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 07:39:32 -0700 |
| commit | ccdfe3a66a57f5e36f56101e60946ee341eb5f1b (patch) | |
| tree | 1d6fcd267589ebf8b9b5cc1692ad2fa0f757275d /drivers/mmc/host | |
| parent | 500f35648e5ebd04be00f974738a9db959a892b8 (diff) | |
| download | kernel_samsung_smdk4412-ccdfe3a66a57f5e36f56101e60946ee341eb5f1b.zip kernel_samsung_smdk4412-ccdfe3a66a57f5e36f56101e60946ee341eb5f1b.tar.gz kernel_samsung_smdk4412-ccdfe3a66a57f5e36f56101e60946ee341eb5f1b.tar.bz2 | |
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@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Kishore Kadiyala <kishore.kadiyala@ti.com>
Cc: Pierre Ossman <drzeus@drzeus.cx>
Cc: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Philip Langdale <philipl@overt.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 1cf9cfb..fee895b 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) { |