[PATCH 4/5] proximity: vl53l0x: Handle the reset GPIO

[Markuss Broks <markuss.broks@xxxxxxxxx>]

Handle the GPIO connected to the XSHUT/RST_N pin of VL53L0X.

Signed-off-by: Markuss Broks <markuss.broks@xxxxxxxxx>
---
 drivers/iio/proximity/vl53l0x-i2c.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/iio/proximity/vl53l0x-i2c.c b/drivers/iio/proximity/vl53l0x-i2c.c
index 74aeb2548ef6..47022bc1504e 100644
--- a/drivers/iio/proximity/vl53l0x-i2c.c
+++ b/drivers/iio/proximity/vl53l0x-i2c.c
@@ -15,6 +15,7 @@
  */
 
 #include <linux/delay.h>
+#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
@@ -43,6 +44,7 @@ struct vl53l0x_data {
 	struct i2c_client *client;
 	struct completion completion;
 	struct regulator *vdd_supply;
+	struct gpio_desc *reset_gpio;
 };
 
 static irqreturn_t vl53l0x_handle_irq(int irq, void *priv)
@@ -192,6 +194,8 @@ static void vl53l0x_power_off(void *_data)
 {
 	struct vl53l0x_data *data = _data;
 
+	gpiod_set_value_cansleep(data->reset_gpio, 1);
+
 	regulator_disable(data->vdd_supply);
 }
 
@@ -203,6 +207,8 @@ static int vl53l0x_power_on(struct vl53l0x_data *data)
 	if (ret)
 		return ret;
 
+	gpiod_set_value_cansleep(data->reset_gpio, 0);
+
 	usleep_range(3200, 5000);
 
 	return 0;
@@ -232,6 +238,11 @@ static int vl53l0x_probe(struct i2c_client *client)
 		return dev_err_probe(&client->dev, PTR_ERR(data->vdd_supply),
 				     "Unable to get VDD regulator\n");
 
+	data->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(data->reset_gpio))
+		return dev_err_probe(&client->dev, PTR_ERR(data->reset_gpio),
+				     "Cannot get reset GPIO\n");
+
 	error = devm_add_action_or_reset(&client->dev, vl53l0x_power_off, data);
 	if (error)
 		return dev_err_probe(&client->dev, error,
-- 
2.35.1