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Commit ccdfe3a6 authored by Anand Gadiyar's avatar Anand Gadiyar Committed by Linus Torvalds
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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: default avatarAnand Gadiyar <gadiyar@ti.com>
Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: default avatarKishore 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 500f3564

drivers/mmc/host/omap_hsmmc.c

+8 −1
Original line number Diff line number Diff line
@@ -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)
@@ -241,6 +243,11 @@ 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);



	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;