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mmc: sdhci: Add a callback to select drive strength 

Add a callbak to let host drivers select drive
strength.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2015-02-06 14:12:59 +02:00 committed by Ulf Hansson
parent cc4f414c88
commit cb8496482e
2 changed files with 17 additions and 0 deletions
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13
drivers/mmc/host/sdhci.c
View File

@ -2048,6 +2048,18 @@ out_unlock:
return err;
}
static int sdhci_select_drive_strength(struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type)
{
struct sdhci_host *host = mmc_priv(card->host);
if (!host->ops->select_drive_strength)
return 0;
return host->ops->select_drive_strength(host, card, max_dtr, host_drv,
card_drv, drv_type);
}
static void sdhci_enable_preset_value(struct sdhci_host *host, bool enable)
{
@ -2192,6 +2204,7 @@ static const struct mmc_host_ops sdhci_ops = {
.start_signal_voltage_switch = sdhci_start_signal_voltage_switch,
.prepare_hs400_tuning = sdhci_prepare_hs400_tuning,
.execute_tuning = sdhci_execute_tuning,
.select_drive_strength = sdhci_select_drive_strength,
.card_event = sdhci_card_event,
.card_busy = sdhci_card_busy,
};

4
drivers/mmc/host/sdhci.h
View File

@ -538,6 +538,10 @@ struct sdhci_ops {
void (*platform_init)(struct sdhci_host *host);
void (*card_event)(struct sdhci_host *host);
void (*voltage_switch)(struct sdhci_host *host);
int (*select_drive_strength)(struct sdhci_host *host,
struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS