This patch adds a callback function to do
controller-specific actions when switching voltages.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.
Signed-off-by: Vincent Yang <Vincent.Yang@xxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 4 ++++
drivers/mmc/host/sdhci.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index ada1a3e..66ad318 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1790,6 +1790,10 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host,
ctrl |= SDHCI_CTRL_VDD_180;
sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+ /* Some controller need to do more when switching */
+ if (host->ops->voltage_switch)
+ host->ops->voltage_switch(host);
+
/* 1.8V regulator output should be stable within 5 ms */
ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
if (ctrl & SDHCI_CTRL_VDD_180)
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 31896a7..b6080ac 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -296,6 +296,7 @@ struct sdhci_ops {
void (*adma_workaround)(struct sdhci_host *host, u32 intmask);
void (*platform_init)(struct sdhci_host *host);
void (*card_event)(struct sdhci_host *host);
+ void (*voltage_switch)(struct sdhci_host *host);
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
--
1.9.0
--
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