From: Kevin Liu <kliu5@xxxxxxxxxxx>
Add the interface since emmc may need 1.2v voltage.
The function should be controller specific.
Signed-off-by: Kevin Liu <kliu5@xxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 3 +++
drivers/mmc/host/sdhci.h | 1 +
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 08dae93..8c56435 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1754,6 +1754,9 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
else if (!(ctrl & SDHCI_CTRL_VDD_180) &&
(ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180))
return sdhci_do_1_8v_signal_voltage_switch(host, ctrl);
+ else if ((ios->signal_voltage == MMC_SIGNAL_VOLTAGE_120) &&
+ host->ops->signal_voltage_switch_1_2v)
+ return host->ops->signal_voltage_switch_1_2v(host);
else
/* No signal voltage switch required */
return 0;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 2e89dac..e847fa3 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -280,6 +280,7 @@ struct sdhci_ops {
void (*hw_reset)(struct sdhci_host *host);
void (*platform_suspend)(struct sdhci_host *host);
void (*platform_resume)(struct sdhci_host *host);
+ int (*signal_voltage_switch_1_2v)(struct sdhci_host *host);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
1.7.0.4
--
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