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mmc: sdhci: export sdhci_execute_tuning()

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Some SDHCI-compat controllers support not only SD, but also eMMC,
but they use different commands for tuning: CMD19 for SD, CMD21 for
eMMC.

Due to the difference of the underlying mechanism, some controllers
(at least, the Cadence IP is the case) provide their own registers
for the eMMC tuning.

This commit will be useful when we want to override .execute_tuning
callback (for eMMC HS200 tuning), but still let it fall back to
sdhci_execute_tuning() for SD timing.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Masahiro Yamada
2016-12-08 21:50:54 +09:00
committed by Ulf Hansson
parent 6b11e70bb7
commit 85a882c2e9
2 changed files with 3 additions and 1 deletions
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3
drivers/mmc/host/sdhci.c
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@@ -2100,7 +2100,7 @@ static void __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode,
sdhci_reset_tuning(host);
}
static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
{
struct sdhci_host *host = mmc_priv(mmc);
int err = 0;
@@ -2168,6 +2168,7 @@ out_unlock:
return err;
}
EXPORT_SYMBOL_GPL(sdhci_execute_tuning);
static int sdhci_select_drive_strength(struct mmc_card *card,
unsigned int max_dtr, int host_drv,