TononixOS/ubports_kernel_google_msm
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mmc: core: Use CMD23 for multiblock transfers when we can.

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CMD23-prefixed instead of open-ended multiblock transfers
have a performance advantage on some MMC cards.

Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Andrei Warkentin
2011-05-23 15:06:36 -05:00
committed by Chris Ball
parent c59de92879
commit d0c97cfb81
5 changed files with 93 additions and 29 deletions
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6
include/linux/mmc/mmc.h
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@@ -83,6 +83,12 @@
#define MMC_APP_CMD 55 /* ac [31:16] RCA R1 */
#define MMC_GEN_CMD 56 /* adtc [0] RD/WR R1 */
static inline bool mmc_op_multi(u32 opcode)
{
return opcode == MMC_WRITE_MULTIPLE_BLOCK ||
opcode == MMC_READ_MULTIPLE_BLOCK;
}
/*
* MMC_SWITCH argument format:
*