Add a signal voltage switching callback to let host use its own
switching process.
Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxxxxxxxx>
---
Changes for v2:
- Modified commit message
- Added SDR50 support patches
---
drivers/mmc/host/sdhci.c | 5 +++++
drivers/mmc/host/sdhci.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 64b7fdb..9b3d4c2 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1757,6 +1757,11 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
if (host->version < SDHCI_SPEC_300)
return 0;
+ if (host->ops->signal_voltage_switch) {
+ host->ops->signal_voltage_switch(host, ios->signal_voltage);
+ return 0;
+ }
+
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 7c02ff4..723f034 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -544,6 +544,8 @@ struct sdhci_ops {
struct mmc_card *card,
unsigned int max_dtr, int host_drv,
int card_drv, int *drv_type);
+ void (*signal_voltage_switch)(struct sdhci_host *host,
+ unsigned char signal_voltage);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
2.1.0.27.g96db324
--
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