[PATCH V2 09/11] mmc: sdhci: Add a callback to select drive strength

Adrian Hunter
2015-02-06T12:15:10Z

Add a callbak to let host drivers select drive
strength.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
drivers/mmc/host/sdhci.c | 13 +++++++++++++
drivers/mmc/host/sdhci.h | 4 ++++
2 files changed, 17 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 8848e06..fe1b00d 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2054,6 +2054,18 @@ 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)
{
@@ -2198,6 +2210,7 @@ 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,
};
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 0315e18..57e7bad 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -340,6 +340,10 @@ 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
--
1.9.1