diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2016-05-26 01:56:22 (GMT) |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-07-25 08:34:05 (GMT) |
| commit | 81ac2af65793ecfbd79875d45043ff4adc0982b8 (patch) | |
| tree | 69b4cce8998d3921d6b04720e658a6d6593e8d4c /drivers/mmc/core/bus.c | |
| parent | ef29c0e273b874018f1802d12957d22008138240 (diff) | |
| download | linux-81ac2af65793ecfbd79875d45043ff4adc0982b8.tar.xz | |
mmc: core: implement enhanced strobe support
Controllers use data strobe line to latch data from devices
under hs400 mode, but not for cmd line. So since emmc 5.1, JEDEC
introduces enhanced strobe mode for latching cmd response from
emmc devices to host controllers. This new feature is optional,
so it depends both on device's cap and host's cap to decide
whether to use it or not.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/bus.c')
| -rw-r--r-- | drivers/mmc/core/bus.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c index 4bc48f1..c64266f 100644 --- a/drivers/mmc/core/bus.c +++ b/drivers/mmc/core/bus.c @@ -332,12 +332,13 @@ int mmc_add_card(struct mmc_card *card) mmc_card_ddr52(card) ? "DDR " : "", type); } else { - pr_info("%s: new %s%s%s%s%s card at address %04x\n", + pr_info("%s: new %s%s%s%s%s%s card at address %04x\n", 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_hs400es(card) ? "Enhanced strobe " : "", mmc_card_ddr52(card) ? "DDR " : "", uhs_bus_speed_mode, type, card->rca); } |