mmc: sdhci-acpi: convert to use GPIO descriptor API

The new descriptor based GPIO interface is now the recommended and safer
way of using GPIOs from device drivers. Convert the ACPI SDHCI driver to
use that interface.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/mmc/host/sdhci-acpi.c

@@ -31,10 +31,9 @@
 #include <linux/bitops.h>
 #include <linux/types.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/acpi.h>
-#include <linux/acpi_gpio.h>
 #include <linux/pm.h>
 #include <linux/pm_runtime.h>
 #include <linux/delay.h>
@@ -199,22 +198,23 @@ static irqreturn_t sdhci_acpi_sd_cd(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static int sdhci_acpi_add_own_cd(struct device *dev, int gpio,
-				 struct mmc_host *mmc)
+static int sdhci_acpi_add_own_cd(struct device *dev, struct mmc_host *mmc)
 {
+	struct gpio_desc *desc;
 	unsigned long flags;
 	int err, irq;
 
-	if (gpio < 0) {
-		err = gpio;
+	desc = devm_gpiod_get_index(dev, "sd_cd", 0);
+	if (IS_ERR(desc)) {
+		err = PTR_ERR(desc);
 		goto out;
 	}
 
-	err = devm_gpio_request_one(dev, gpio, GPIOF_DIR_IN, "sd_cd");
+	err = gpiod_direction_input(desc);
 	if (err)
-		goto out;
+		goto out_free;
 
-	irq = gpio_to_irq(gpio);
+	irq = gpiod_to_irq(desc);
 	if (irq < 0) {
 		err = irq;
 		goto out_free;
@@ -228,7 +228,7 @@ static int sdhci_acpi_add_own_cd(struct device *dev, int gpio,
 	return 0;
 
 out_free:
-	devm_gpio_free(dev, gpio);
+	devm_gpiod_put(dev, desc);
 out:
 	dev_warn(dev, "failed to setup card detect wake up\n");
 	return err;
@@ -236,8 +236,7 @@ static int sdhci_acpi_add_own_cd(struct device *dev, int gpio,
 
 #else
 
-static int sdhci_acpi_add_own_cd(struct device *dev, int gpio,
-				 struct mmc_host *mmc)
+static int sdhci_acpi_add_own_cd(struct device *dev, struct mmc_host *mmc)
 {
 	return 0;
 }
@@ -254,7 +253,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
 	struct resource *iomem;
 	resource_size_t len;
 	const char *hid;
-	int err, gpio;
+	int err;
 
 	if (acpi_bus_get_device(handle, &device))
 		return -ENODEV;
@@ -279,8 +278,6 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
 	if (IS_ERR(host))
 		return PTR_ERR(host);
 
-	gpio = acpi_get_gpio_by_index(dev, 0, NULL);
-
 	c = sdhci_priv(host);
 	c->host = host;
 	c->slot = sdhci_acpi_get_slot(handle, hid);
@@ -338,7 +335,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
 		goto err_free;
 
 	if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
-		if (sdhci_acpi_add_own_cd(dev, gpio, host->mmc))
+		if (sdhci_acpi_add_own_cd(dev, host->mmc))
 			c->use_runtime_pm = false;
 	}