NFC: st-nci: Covert to use GPIO descriptor

Since we got rid of platform data, the driver may use GPIO descriptor
directly.

Looking deeply to the use of the GPIO pin it looks like it should be
a GPIO based reset control rather than custom GPIO handling. But this
is out of scope of the change.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 12 insertions, 27 deletions

diff --git a/drivers/nfc/st-nci/i2c.c b/drivers/nfc/st-nci/i2c.c
index bdfbd543e671..93a621e27d4e 100644
--- a/drivers/nfc/st-nci/i2c.c
+++ b/drivers/nfc/st-nci/i2c.c
@@ -19,13 +19,12 @@
 
 #include <linux/module.h>
 #include <linux/i2c.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
-#include <linux/of_gpio.h>
 #include <linux/acpi.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/nfc.h>
+#include <linux/of.h>
 
 #include "st-nci.h"
 
@@ -49,7 +48,7 @@ struct st_nci_i2c_phy {
 
 	bool irq_active;
 
-	unsigned int gpio_reset;
+	struct gpio_desc *gpiod_reset;
 
 	struct st_nci_se_status se_status;
 };
@@ -58,9 +57,9 @@ static int st_nci_i2c_enable(void *phy_id)
 {
 	struct st_nci_i2c_phy *phy = phy_id;
 
-	gpio_set_value(phy->gpio_reset, 0);
+	gpiod_set_value(phy->gpiod_reset, 0);
 	usleep_range(10000, 15000);
-	gpio_set_value(phy->gpio_reset, 1);
+	gpiod_set_value(phy->gpiod_reset, 1);
 	usleep_range(80000, 85000);
 
 	if (phy->ndlc->powered == 0 && phy->irq_active == 0) {
@@ -209,20 +208,17 @@ static struct nfc_phy_ops i2c_phy_ops = {
 static int st_nci_i2c_acpi_request_resources(struct i2c_client *client)
 {
 	struct st_nci_i2c_phy *phy = i2c_get_clientdata(client);
-	struct gpio_desc *gpiod_reset;
 	struct device *dev = &client->dev;
 	u8 tmp;
 
 	/* Get RESET GPIO from ACPI */
-	gpiod_reset = devm_gpiod_get_index(dev, ST_NCI_GPIO_NAME_RESET, 1,
-					   GPIOD_OUT_HIGH);
-	if (IS_ERR(gpiod_reset)) {
+	phy->gpiod_reset = devm_gpiod_get_index(dev, ST_NCI_GPIO_NAME_RESET,
+						1, GPIOD_OUT_HIGH);
+	if (IS_ERR(phy->gpiod_reset)) {
 		nfc_err(dev, "Unable to get RESET GPIO\n");
 		return -ENODEV;
 	}
 
-	phy->gpio_reset = desc_to_gpio(gpiod_reset);
-
 	phy->se_status.is_ese_present = false;
 	phy->se_status.is_uicc_present = false;
 
@@ -242,30 +238,19 @@ static int st_nci_i2c_acpi_request_resources(struct i2c_client *client)
 static int st_nci_i2c_of_request_resources(struct i2c_client *client)
 {
 	struct st_nci_i2c_phy *phy = i2c_get_clientdata(client);
+	struct device *dev = &client->dev;
 	struct device_node *pp;
-	int gpio;
-	int r;
 
 	pp = client->dev.of_node;
 	if (!pp)
 		return -ENODEV;
 
 	/* Get GPIO from device tree */
-	gpio = of_get_named_gpio(pp, "reset-gpios", 0);
-	if (gpio < 0) {
-		nfc_err(&client->dev,
-			"Failed to retrieve reset-gpios from device tree\n");
-		return gpio;
-	}
-
-	/* GPIO request and configuration */
-	r = devm_gpio_request_one(&client->dev, gpio,
-				GPIOF_OUT_INIT_HIGH, ST_NCI_GPIO_NAME_RESET);
-	if (r) {
-		nfc_err(&client->dev, "Failed to request reset pin\n");
-		return r;
+	phy->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(phy->gpiod_reset)) {
+		nfc_err(dev, "Unable to get RESET GPIO\n");
+		return PTR_ERR(phy->gpiod_reset);
 	}
-	phy->gpio_reset = gpio;
 
 	phy->se_status.is_ese_present =
 				of_property_read_bool(pp, "ese-present");