diff options
| author | Seungwon Jeon <tgih.jun@samsung.com> | 2014-04-23 10:14:58 +0200 |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2014-05-13 00:06:06 +0200 |
| commit | 0a5b6438ee482696360bb013e67b8488f63d3e9e (patch) | |
| tree | 1db1f058b17823a6ae4722c21d7f916e129694c4 /drivers/mmc/core/bus.c | |
| parent | mmc: rework selection of bus speed mode (diff) | |
| download | linux-0a5b6438ee482696360bb013e67b8488f63d3e9e.tar.xz linux-0a5b6438ee482696360bb013e67b8488f63d3e9e.zip | |
mmc: add support for HS400 mode of eMMC5.0
This patch adds HS400 mode support for eMMC5.0 device. HS400 mode is high
speed DDR interface timing from HS200. Clock frequency is up to 200MHz
and only 8-bit bus width is supported. In addition, tuning process of
HS200 is required to synchronize the command response on the CMD line
because CMD input timing for HS400 mode is the same as HS200 mode.
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Reviewed-by: Jackey Shen <jackey.shen@amd.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc/core/bus.c')
| -rw-r--r-- | drivers/mmc/core/bus.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index f37e9d6af84a..d2dbf02022bd 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -349,6 +349,7 @@ int mmc_add_card(struct mmc_card *card) mmc_hostname(card->host), mmc_card_uhs(card) ? "ultra high speed " : (mmc_card_hs(card) ? "high speed " : ""), + mmc_card_hs400(card) ? "HS400 " : (mmc_card_hs200(card) ? "HS200 " : ""), mmc_card_ddr52(card) ? "DDR " : "", uhs_bus_speed_mode, type, card->rca); |