mmc: sdhci: Factor out sdhci_enable_clk

Factor out sdhci_enable_clk from sdhci_set_clock
and make it EXPORT_SYMBOL so that it can be called.
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci.c

@@ -1344,20 +1344,10 @@ u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
 }
 EXPORT_SYMBOL_GPL(sdhci_calc_clk);
 
-void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
+void sdhci_enable_clk(struct sdhci_host *host, u16 clk)
 {
-	u16 clk;
 	unsigned long timeout;
 
-	host->mmc->actual_clock = 0;
-
-	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
-
-	if (clock == 0)
-		return;
-
-	clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
-
 	clk |= SDHCI_CLOCK_INT_EN;
 	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 
@@ -1378,6 +1368,22 @@ void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 	clk |= SDHCI_CLOCK_CARD_EN;
 	sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 }
+EXPORT_SYMBOL_GPL(sdhci_enable_clk);
+
+void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+	u16 clk;
+
+	host->mmc->actual_clock = 0;
+
+	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
+
+	if (clock == 0)
+		return;
+
+	clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
+	sdhci_enable_clk(host, clk);
+}
 EXPORT_SYMBOL_GPL(sdhci_set_clock);
 
 static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode,

drivers/mmc/host/sdhci.h

@@ -682,6 +682,7 @@ static inline bool sdhci_sdio_irq_enabled(struct sdhci_host *host)
 u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock,
 		   unsigned int *actual_clock);
 void sdhci_set_clock(struct sdhci_host *host, unsigned int clock);
+void sdhci_enable_clk(struct sdhci_host *host, u16 clk);
 void sdhci_set_power(struct sdhci_host *host, unsigned char mode,
 		     unsigned short vdd);
 void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,