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| author | Adrian Hunter <adrian.hunter@intel.com> | 2017-04-20 11:14:43 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 22:42:27 +0300 |
| commit | 83b600b8de0e83661a8f40091a7966fac052a21b (patch) | |
| tree | 4a4763e27e7814c3693c0449a9b8517def13c2da /drivers/mmc/host/sdhci.h | |
| parent | ba49cbd0936e12eac245c0fb420a291e8505f639 (diff) | |
| download | linux-83b600b8de0e83661a8f40091a7966fac052a21b.tar.xz | |
mmc: sdhci: Control the delay between tuning commands
The delay between tuning commands for SD cards is not part of the
specification. A driver that needs it probably needs it for eMMC
too, whereas most drivers would probably like to set it to 0. Make
it a host member (host->tuning_delay) that defaults to the existing
behaviour. Drivers can set it to zero to eliminate the delay, or
set it to a positive value to always have a delay.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.h')
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 78437f82609e..0469fa191493 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -538,6 +538,8 @@ struct sdhci_host { #define SDHCI_TUNING_MODE_1 0 #define SDHCI_TUNING_MODE_2 1 #define SDHCI_TUNING_MODE_3 2 + /* Delay (ms) between tuning commands */ + int tuning_delay; unsigned long private[0] ____cacheline_aligned; }; |