[media] si4713: switch reset gpio to devm_gpiod API

This updates the driver to use the managed gpiod interface
instead of the unmanged old GPIO API. This is a preperation
for the introduction of device tree support.

Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
[hans.verkuil@cisco.com: fixed trivial compiler warning]

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

2 files changed, 19 insertions, 22 deletions

diff --git a/drivers/media/radio/si4713/si4713.c b/drivers/media/radio/si4713/si4713.c
index 5c2a2fcb8965..952550e7be8f 100644
--- a/drivers/media/radio/si4713/si4713.c
+++ b/drivers/media/radio/si4713/si4713.c
@@ -383,9 +383,9 @@ static int si4713_powerup(struct si4713_device *sdev)
                 }
         }
 
-        if (gpio_is_valid(sdev->gpio_reset)) {
+        if (!IS_ERR(sdev->gpio_reset)) {
                 udelay(50);
-                gpio_set_value(sdev->gpio_reset, 1);
+                gpiod_set_value(sdev->gpio_reset, 1);
         }
 
         if (client->irq)
@@ -407,8 +407,8 @@ static int si4713_powerup(struct si4713_device *sdev)
                                                 SI4713_STC_INT | SI4713_CTS);
                 return err;
         }
-        if (gpio_is_valid(sdev->gpio_reset))
-                gpio_set_value(sdev->gpio_reset, 0);
+        if (!IS_ERR(sdev->gpio_reset))
+                gpiod_set_value(sdev->gpio_reset, 0);
 
 
         if (sdev->vdd) {
@@ -447,8 +447,8 @@ static int si4713_powerdown(struct si4713_device *sdev)
                 v4l2_dbg(1, debug, &sdev->sd, "Power down response: 0x%02x\n",
                                 resp[0]);
                 v4l2_dbg(1, debug, &sdev->sd, "Device in reset mode\n");
-                if (gpio_is_valid(sdev->gpio_reset))
-                        gpio_set_value(sdev->gpio_reset, 0);
+                if (!IS_ERR(sdev->gpio_reset))
+                        gpiod_set_value(sdev->gpio_reset, 0);
 
                 if (sdev->vdd) {
                         err = regulator_disable(sdev->vdd);
@@ -1446,7 +1446,6 @@ static int si4713_probe(struct i2c_client *client,
                                         const struct i2c_device_id *id)
 {
         struct si4713_device *sdev;
-        struct si4713_platform_data *pdata = client->dev.platform_data;
         struct v4l2_ctrl_handler *hdl;
         int rval;
 
@@ -1457,16 +1456,17 @@ static int si4713_probe(struct i2c_client *client,
                 goto exit;
         }
 
-        sdev->gpio_reset = -1;
-        if (pdata && gpio_is_valid(pdata->gpio_reset)) {
-                rval = gpio_request(pdata->gpio_reset, "si4713 reset");
-                if (rval) {
-                        dev_err(&client->dev,
-                                "Failed to request gpio: %d\n", rval);
-                        goto free_sdev;
-                }
-                sdev->gpio_reset = pdata->gpio_reset;
-                gpio_direction_output(sdev->gpio_reset, 0);
+        sdev->gpio_reset = devm_gpiod_get(&client->dev, "reset");
+        if (!IS_ERR(sdev->gpio_reset)) {
+                gpiod_direction_output(sdev->gpio_reset, 0);
+        } else if (PTR_ERR(sdev->gpio_reset) == -ENOENT) {
+                dev_dbg(&client->dev, "No reset GPIO assigned\n");
+        } else if (PTR_ERR(sdev->gpio_reset) == -ENOSYS) {
+                dev_dbg(&client->dev, "No reset GPIO support\n");
+        } else {
+                rval = PTR_ERR(sdev->gpio_reset);
+                dev_err(&client->dev, "Failed to request gpio: %d\n", rval);
+                goto free_sdev;
         }
 
         sdev->vdd = devm_regulator_get_optional(&client->dev, "vdd");
@@ -1614,8 +1614,6 @@ free_irq:
                 free_irq(client->irq, sdev);
 free_ctrls:
         v4l2_ctrl_handler_free(hdl);
-        if (gpio_is_valid(sdev->gpio_reset))
-                gpio_free(sdev->gpio_reset);
 free_sdev:
         kfree(sdev);
 exit:
@@ -1636,8 +1634,6 @@ static int si4713_remove(struct i2c_client *client)
 
         v4l2_device_unregister_subdev(sd);
         v4l2_ctrl_handler_free(sd->ctrl_handler);
-        if (gpio_is_valid(sdev->gpio_reset))
-                gpio_free(sdev->gpio_reset);
         kfree(sdev);
 
         return 0;
diff --git a/drivers/media/radio/si4713/si4713.h b/drivers/media/radio/si4713/si4713.h
index ed28ed27c95f..7c2479f42329 100644
--- a/drivers/media/radio/si4713/si4713.h
+++ b/drivers/media/radio/si4713/si4713.h
@@ -16,6 +16,7 @@
 #define SI4713_I2C_H
 
 #include <linux/regulator/consumer.h>
+#include <linux/gpio/consumer.h>
 #include <media/v4l2-subdev.h>
 #include <media/v4l2-ctrls.h>
 #include <media/si4713.h>
@@ -236,7 +237,7 @@ struct si4713_device {
         struct completion work;
         struct regulator *vdd;
         struct regulator *vio;
-        int gpio_reset;
+        struct gpio_desc *gpio_reset;
         u32 power_state;
         u32 rds_enabled;
         u32 frequency;