X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fnfc%2Fst-nci%2Fi2c.c;h=515f08d037fb40c0656dd07808c67e6ffffc1f0e;hb=b6ffe9ba46016f8351896ccee33bebcd0e5ea7c0;hp=93a621e27d4e5c6d34b042e0514e4c4d3aea23f9;hpb=a89e68f118e96b165555f7c64fee8aaff7bb7fb3;p=karo-tx-linux.git

diff --git a/drivers/nfc/st-nci/i2c.c b/drivers/nfc/st-nci/i2c.c
index 93a621e27d4e..515f08d037fb 100644
--- a/drivers/nfc/st-nci/i2c.c
+++ b/drivers/nfc/st-nci/i2c.c
@@ -40,8 +40,6 @@
 #define ST_NCI_DRIVER_NAME "st_nci"
 #define ST_NCI_I2C_DRIVER_NAME "st_nci_i2c"
 
-#define ST_NCI_GPIO_NAME_RESET "reset"
-
 struct st_nci_i2c_phy {
 	struct i2c_client *i2c_dev;
 	struct llt_ndlc *ndlc;
@@ -205,64 +203,17 @@ static struct nfc_phy_ops i2c_phy_ops = {
 	.disable = st_nci_i2c_disable,
 };
 
-static int st_nci_i2c_acpi_request_resources(struct i2c_client *client)
-{
-	struct st_nci_i2c_phy *phy = i2c_get_clientdata(client);
-	struct device *dev = &client->dev;
-	u8 tmp;
-
-	/* Get RESET GPIO from ACPI */
-	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->se_status.is_ese_present = false;
-	phy->se_status.is_uicc_present = false;
-
-	if (device_property_present(dev, "ese-present")) {
-		device_property_read_u8(dev, "ese-present", &tmp);
-		phy->se_status.is_ese_present = tmp;
-	}
-
-	if (device_property_present(dev, "uicc-present")) {
-		device_property_read_u8(dev, "uicc-present", &tmp);
-		phy->se_status.is_uicc_present = tmp;
-	}
-
-	return 0;
-}
-
-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;
-
-	pp = client->dev.of_node;
-	if (!pp)
-		return -ENODEV;
+static const struct acpi_gpio_params reset_gpios = { 1, 0, false };
 
-	/* Get GPIO from device tree */
-	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->se_status.is_ese_present =
-				of_property_read_bool(pp, "ese-present");
-	phy->se_status.is_uicc_present =
-				of_property_read_bool(pp, "uicc-present");
-
-	return 0;
-}
+static const struct acpi_gpio_mapping acpi_st_nci_gpios[] = {
+	{ "reset-gpios", &reset_gpios, 1 },
+	{},
+};
 
 static int st_nci_i2c_probe(struct i2c_client *client,
 				  const struct i2c_device_id *id)
 {
+	struct device *dev = &client->dev;
 	struct st_nci_i2c_phy *phy;
 	int r;
 
@@ -274,8 +225,7 @@ static int st_nci_i2c_probe(struct i2c_client *client,
 		return -ENODEV;
 	}
 
-	phy = devm_kzalloc(&client->dev, sizeof(struct st_nci_i2c_phy),
-			   GFP_KERNEL);
+	phy = devm_kzalloc(dev, sizeof(struct st_nci_i2c_phy), GFP_KERNEL);
 	if (!phy)
 		return -ENOMEM;
 
@@ -283,24 +233,22 @@ static int st_nci_i2c_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, phy);
 
-	if (client->dev.of_node) {
-		r = st_nci_i2c_of_request_resources(client);
-		if (r) {
-			nfc_err(&client->dev, "No platform data\n");
-			return r;
-		}
-	} else if (ACPI_HANDLE(&client->dev)) {
-		r = st_nci_i2c_acpi_request_resources(client);
-		if (r) {
-			nfc_err(&client->dev, "Cannot get ACPI data\n");
-			return r;
-		}
-	} else {
-		nfc_err(&client->dev,
-			"st_nci platform resources not available\n");
+	r = devm_acpi_dev_add_driver_gpios(dev, acpi_st_nci_gpios);
+	if (r)
+		dev_dbg(dev, "Unable to add GPIO mapping table\n");
+
+	/* Get RESET GPIO */
+	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 -ENODEV;
 	}
 
+	phy->se_status.is_ese_present =
+				device_property_read_bool(dev, "ese-present");
+	phy->se_status.is_uicc_present =
+				device_property_read_bool(dev, "uicc-present");
+
 	r = ndlc_probe(phy, &i2c_phy_ops, &client->dev,
 			ST_NCI_FRAME_HEADROOM, ST_NCI_FRAME_TAILROOM,
 			&phy->ndlc, &phy->se_status);