mmc: sdhci: Deduplicate sdhci_get_cd_nogpio()

The analogue of the sdhci_get_cd_nogpio() is used in the sdhci-pci-core
and sdhci-acpi modules. Deduplicate it by moving to sdhci and exporting.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20211014132613.27861-2-andriy.shevchenko@linux.intel.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-acpi.c

@@ -362,23 +362,11 @@ static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
 static int bxt_get_cd(struct mmc_host *mmc)
 {
 	int gpio_cd = mmc_gpio_get_cd(mmc);
-	struct sdhci_host *host = mmc_priv(mmc);
-	unsigned long flags;
-	int ret = 0;
 
 	if (!gpio_cd)
 		return 0;
 
-	spin_lock_irqsave(&host->lock, flags);
-
-	if (host->flags & SDHCI_DEVICE_DEAD)
-		goto out;
-
-	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
-out:
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	return ret;
+	return sdhci_get_cd_nogpio(mmc);
 }
 
 static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)

drivers/mmc/host/sdhci-pci-core.c

@@ -616,24 +616,6 @@ static int intel_select_drive_strength(struct mmc_card *card,
 	return intel_host->drv_strength;
 }
 
-static int sdhci_get_cd_nogpio(struct mmc_host *mmc)
-{
-	struct sdhci_host *host = mmc_priv(mmc);
-	unsigned long flags;
-	int ret = 0;
-
-	spin_lock_irqsave(&host->lock, flags);
-
-	if (host->flags & SDHCI_DEVICE_DEAD)
-		goto out;
-
-	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
-out:
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	return ret;
-}
-
 static int bxt_get_cd(struct mmc_host *mmc)
 {
 	int gpio_cd = mmc_gpio_get_cd(mmc);

drivers/mmc/host/sdhci.c

@@ -2425,6 +2425,25 @@ static int sdhci_get_cd(struct mmc_host *mmc)
 	return !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
 }
 
+int sdhci_get_cd_nogpio(struct mmc_host *mmc)
+{
+	struct sdhci_host *host = mmc_priv(mmc);
+	unsigned long flags;
+	int ret = 0;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	if (host->flags & SDHCI_DEVICE_DEAD)
+		goto out;
+
+	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
+out:
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(sdhci_get_cd_nogpio);
+
 static int sdhci_check_ro(struct sdhci_host *host)
 {
 	unsigned long flags;

drivers/mmc/host/sdhci.h

@@ -775,6 +775,7 @@ void sdhci_set_power_and_bus_voltage(struct sdhci_host *host,
 				     unsigned short vdd);
 void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode,
 			   unsigned short vdd);
+int sdhci_get_cd_nogpio(struct mmc_host *mmc);
 void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);
 int sdhci_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq);
 void sdhci_set_bus_width(struct sdhci_host *host, int width);