Add a callback for signal voltage switching to let host driver
switch signal voltage in its own way.
Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx>
---
drivers/mmc/host/sdhci.c | 6 ++++++
drivers/mmc/host/sdhci.h | 2 ++
2 files changed, 8 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6fdd7a7..3c9a924 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1852,6 +1852,12 @@ static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
if (host->version < SDHCI_SPEC_300)
return 0;
+ if (host->ops->start_signal_voltage_switch) {
+ ret = host->ops->start_signal_voltage_switch(
+ host, ios->signal_voltage);
+ return ret;
+ }
+
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
switch (ios->signal_voltage) {
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index edf3adf..04af687 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -566,6 +566,8 @@ struct sdhci_ops {
struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type);
+ int (*start_signal_voltage_switch)(struct sdhci_host *host,
+ unsigned char signal_voltage);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
2.1.0.27.g96db324
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
