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| author | Dong Aisheng <aisheng.dong@nxp.com> | 2016-07-12 09:46:17 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-07-25 10:34:55 +0200 |
| commit | f37b20ebc4bc7c41e6fe1f4af6a62e9de70b771b (patch) | |
| tree | d1910e5d1867242c5e0e7b12a017850b46dc4a61 /drivers/mmc/host/sdhci.h | |
| parent | doc: dt: fsl-imx-esdhc: add set tuning start point binding (diff) | |
| download | linux-f37b20ebc4bc7c41e6fe1f4af6a62e9de70b771b.tar.xz linux-f37b20ebc4bc7c41e6fe1f4af6a62e9de70b771b.zip | |
mmc: sdhci: add standard hw auto retuning support
If HW supports SDHCI_TUNING_MODE_3 which is auto retuning, we won't
retune during runtime suspend and resume, instead we use Re-tuning
Request signaled via SDHCI_INT_RETUNE interrupt to do retuning and
hw auto retuning during data transfer to guarantee the signal sample
window correction.
This can avoid a mass of repeatedly retuning during small file system
data access and improve the performance.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.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 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index e241e11a90d0..0411c9f36461 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -128,6 +128,7 @@ #define SDHCI_INT_CARD_INSERT 0x00000040 #define SDHCI_INT_CARD_REMOVE 0x00000080 #define SDHCI_INT_CARD_INT 0x00000100 +#define SDHCI_INT_RETUNE 0x00001000 #define SDHCI_INT_ERROR 0x00008000 #define SDHCI_INT_TIMEOUT 0x00010000 #define SDHCI_INT_CRC 0x00020000 @@ -518,6 +519,8 @@ struct sdhci_host { unsigned int tuning_count; /* Timer count for re-tuning */ unsigned int tuning_mode; /* Re-tuning mode supported by host */ #define SDHCI_TUNING_MODE_1 0 +#define SDHCI_TUNING_MODE_2 1 +#define SDHCI_TUNING_MODE_3 2 unsigned long private[0] ____cacheline_aligned; }; |