3 files changed, 15 insertions, 24 deletions

diff --git a/drivers/gnss/serial.c b/drivers/gnss/serial.c
index 5d8e9bfb24..baa956494e 100644
--- a/drivers/gnss/serial.c
+++ b/drivers/gnss/serial.c
@@ -80,8 +80,8 @@ static const struct gnss_operations gnss_serial_gnss_ops = {
 	.write_raw	= gnss_serial_write_raw,
 };
 
-static int gnss_serial_receive_buf(struct serdev_device *serdev,
-					const unsigned char *buf, size_t count)
+static ssize_t gnss_serial_receive_buf(struct serdev_device *serdev,
+				       const u8 *buf, size_t count)
 {
 	struct gnss_serial *gserial = serdev_device_get_drvdata(serdev);
 	struct gnss_device *gdev = gserial->gdev;
diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c
index bcb53ccfee..6801a8fb20 100644
--- a/drivers/gnss/sirf.c
+++ b/drivers/gnss/sirf.c
@@ -160,8 +160,8 @@ static const struct gnss_operations sirf_gnss_ops = {
 	.write_raw	= sirf_write_raw,
 };
 
-static int sirf_receive_buf(struct serdev_device *serdev,
-				const unsigned char *buf, size_t count)
+static ssize_t sirf_receive_buf(struct serdev_device *serdev,
+				const u8 *buf, size_t count)
 {
 	struct sirf_data *data = serdev_device_get_drvdata(serdev);
 	struct gnss_device *gdev = data->gdev;
diff --git a/drivers/gnss/ubx.c b/drivers/gnss/ubx.c
index c951be202c..92402f6082 100644
--- a/drivers/gnss/ubx.c
+++ b/drivers/gnss/ubx.c
@@ -7,6 +7,7 @@
 
 #include <linux/errno.h>
 #include <linux/gnss.h>
+#include <linux/gpio/consumer.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -17,7 +18,6 @@
 #include "serial.h"
 
 struct ubx_data {
-	struct regulator *v_bckp;
 	struct regulator *vcc;
 };
 
@@ -66,6 +66,7 @@ static const struct gnss_serial_ops ubx_gserial_ops = {
 static int ubx_probe(struct serdev_device *serdev)
 {
 	struct gnss_serial *gserial;
+	struct gpio_desc *reset;
 	struct ubx_data *data;
 	int ret;
 
@@ -87,30 +88,23 @@ static int ubx_probe(struct serdev_device *serdev)
 		goto err_free_gserial;
 	}
 
-	data->v_bckp = devm_regulator_get_optional(&serdev->dev, "v-bckp");
-	if (IS_ERR(data->v_bckp)) {
-		ret = PTR_ERR(data->v_bckp);
-		if (ret == -ENODEV)
-			data->v_bckp = NULL;
-		else
-			goto err_free_gserial;
-	}
+	ret = devm_regulator_get_enable_optional(&serdev->dev, "v-bckp");
+	if (ret < 0 && ret != -ENODEV)
+		goto err_free_gserial;
 
-	if (data->v_bckp) {
-		ret = regulator_enable(data->v_bckp);
-		if (ret)
-			goto err_free_gserial;
+	/* Deassert reset */
+	reset = devm_gpiod_get_optional(&serdev->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(reset)) {
+		ret = PTR_ERR(reset);
+		goto err_free_gserial;
 	}
 
 	ret = gnss_serial_register(gserial);
 	if (ret)
-		goto err_disable_v_bckp;
+		goto err_free_gserial;
 
 	return 0;
 
-err_disable_v_bckp:
-	if (data->v_bckp)
-		regulator_disable(data->v_bckp);
 err_free_gserial:
 	gnss_serial_free(gserial);
 
@@ -120,11 +114,8 @@ err_free_gserial:
 static void ubx_remove(struct serdev_device *serdev)
 {
 	struct gnss_serial *gserial = serdev_device_get_drvdata(serdev);
-	struct ubx_data *data = gnss_serial_get_drvdata(gserial);
 
 	gnss_serial_deregister(gserial);
-	if (data->v_bckp)
-		regulator_disable(data->v_bckp);
 	gnss_serial_free(gserial);
 }